Containing Group/Sub-Group relationships (#5105)

* Add UI support for setting containing groups
* Show containing groups in group details panel
* Move tag hierarchical filter code into separate type
* Add depth to scene_count and add sub_group_count
* Add sub-groups tab to groups page
* Add containing groups to edit groups dialog
* Show containing group description in sub-group view
* Show group scene number in group scenes view
* Add ability to drag move grid cards
* Add sub group order option
* Add reorder sub-groups interface
* Separate page size selector component
* Add interfaces to add and remove sub-groups to a group
* Separate MultiSet components
* Allow setting description while setting containing groups

graphql/schema/schema.graphql

@@ -359,6 +359,12 @@ type Mutation {
   groupsDestroy(ids: [ID!]!): Boolean!
   bulkGroupUpdate(input: BulkGroupUpdateInput!): [Group!]
 
+  addGroupSubGroups(input: GroupSubGroupAddInput!): Boolean!
+  removeGroupSubGroups(input: GroupSubGroupRemoveInput!): Boolean!
+
+  "Reorder sub groups within a group. Returns true if successful."
+  reorderSubGroups(input: ReorderSubGroupsInput!): Boolean!
+
   tagCreate(input: TagCreateInput!): Tag
   tagUpdate(input: TagUpdateInput!): Tag
   tagDestroy(input: TagDestroyInput!): Boolean!

graphql/schema/types/filters.graphql

@@ -261,7 +261,7 @@ input SceneFilterType {
   "Filter to only include scenes with this movie"
   movies: MultiCriterionInput @deprecated(reason: "use groups instead")
   "Filter to only include scenes with this group"
-  groups: MultiCriterionInput
+  groups: HierarchicalMultiCriterionInput
   "Filter to only include scenes with this gallery"
   galleries: MultiCriterionInput
   "Filter to only include scenes with these tags"
@@ -390,6 +390,15 @@ input GroupFilterType {
   "Filter by last update time"
   updated_at: TimestampCriterionInput
 
+  "Filter by containing groups"
+  containing_groups: HierarchicalMultiCriterionInput
+  "Filter by sub groups"
+  sub_groups: HierarchicalMultiCriterionInput
+  "Filter by number of containing groups the group has"
+  containing_group_count: IntCriterionInput
+  "Filter by number of sub-groups the group has"
+  sub_group_count: IntCriterionInput
+
   "Filter by related scenes that meet this criteria"
   scenes_filter: SceneFilterType
   "Filter by related studios that meet this criteria"

graphql/schema/types/group.graphql

@@ -1,3 +1,9 @@
+"GroupDescription represents a relationship to a group with a description of the relationship"
+type GroupDescription {
+  group: Group!
+  description: String
+}
+
 type Group {
   id: ID!
   name: String!
@@ -15,12 +21,21 @@ type Group {
   created_at: Time!
   updated_at: Time!
 
+  containing_groups: [GroupDescription!]!
+  sub_groups: [GroupDescription!]!
+
   front_image_path: String # Resolver
   back_image_path: String # Resolver
-  scene_count: Int! # Resolver
+  scene_count(depth: Int): Int! # Resolver
+  sub_group_count(depth: Int): Int! # Resolver
   scenes: [Scene!]!
 }
 
+input GroupDescriptionInput {
+  group_id: ID!
+  description: String
+}
+
 input GroupCreateInput {
   name: String!
   aliases: String
@@ -34,6 +49,10 @@ input GroupCreateInput {
   synopsis: String
   urls: [String!]
   tag_ids: [ID!]
+
+  containing_groups: [GroupDescriptionInput!]
+  sub_groups: [GroupDescriptionInput!]
+
   "This should be a URL or a base64 encoded data URL"
   front_image: String
   "This should be a URL or a base64 encoded data URL"
@@ -53,12 +72,21 @@ input GroupUpdateInput {
   synopsis: String
   urls: [String!]
   tag_ids: [ID!]
+
+  containing_groups: [GroupDescriptionInput!]
+  sub_groups: [GroupDescriptionInput!]
+
   "This should be a URL or a base64 encoded data URL"
   front_image: String
   "This should be a URL or a base64 encoded data URL"
   back_image: String
 }
 
+input BulkUpdateGroupDescriptionsInput {
+  groups: [GroupDescriptionInput!]!
+  mode: BulkUpdateIdMode!
+}
+
 input BulkGroupUpdateInput {
   clientMutationId: String
   ids: [ID!]
@@ -68,13 +96,42 @@ input BulkGroupUpdateInput {
   director: String
   urls: BulkUpdateStrings
   tag_ids: BulkUpdateIds
+
+  containing_groups: BulkUpdateGroupDescriptionsInput
+  sub_groups: BulkUpdateGroupDescriptionsInput
 }
 
 input GroupDestroyInput {
   id: ID!
 }
 
+input ReorderSubGroupsInput {
+  "ID of the group to reorder sub groups for"
+  group_id: ID!
+  """
+  IDs of the sub groups to reorder. These must be a subset of the current sub groups.
+  Sub groups will be inserted in this order at the insert_index
+  """
+  sub_group_ids: [ID!]!
+  "The sub-group ID at which to insert the sub groups"
+  insert_at_id: ID!
+  "If true, the sub groups will be inserted after the insert_index, otherwise they will be inserted before"
+  insert_after: Boolean
+}
+
 type FindGroupsResultType {
   count: Int!
   groups: [Group!]!
 }
+
+input GroupSubGroupAddInput {
+  containing_group_id: ID!
+  sub_groups: [GroupDescriptionInput!]!
+  "The index at which to insert the sub groups. If not provided, the sub groups will be appended to the end"
+  insert_index: Int
+}
+
+input GroupSubGroupRemoveInput {
+  containing_group_id: ID!
+  sub_group_ids: [ID!]!
+}

graphql/schema/types/movie.graphql

@@ -18,7 +18,7 @@ type Movie {
 
   front_image_path: String # Resolver
   back_image_path: String # Resolver
-  scene_count: Int! # Resolver
+  scene_count(depth: Int): Int! # Resolver
   scenes: [Scene!]!
 }
 

graphql/schema/types/performer.graphql

@@ -56,7 +56,7 @@ type Performer {
   weight: Int
   created_at: Time!
   updated_at: Time!
-  groups: [Group!]! @deprecated(reason: "use groups instead")
+  groups: [Group!]!
   movies: [Movie!]! @deprecated(reason: "use groups instead")
 }
 

internal/api/changeset_translator.go

@@ -434,3 +434,64 @@ func (t changesetTranslator) updateGroupIDsBulk(value *BulkUpdateIds, field stri
 		Mode:   value.Mode,
 	}, nil
 }
+
+func groupsDescriptionsFromGroupInput(input []*GroupDescriptionInput) ([]models.GroupIDDescription, error) {
+	ret := make([]models.GroupIDDescription, len(input))
+
+	for i, v := range input {
+		gID, err := strconv.Atoi(v.GroupID)
+		if err != nil {
+			return nil, fmt.Errorf("invalid group ID: %s", v.GroupID)
+		}
+
+		ret[i] = models.GroupIDDescription{
+			GroupID: gID,
+		}
+		if v.Description != nil {
+			ret[i].Description = *v.Description
+		}
+	}
+
+	return ret, nil
+}
+
+func (t changesetTranslator) groupIDDescriptions(value []*GroupDescriptionInput) (models.RelatedGroupDescriptions, error) {
+	groupsScenes, err := groupsDescriptionsFromGroupInput(value)
+	if err != nil {
+		return models.RelatedGroupDescriptions{}, err
+	}
+
+	return models.NewRelatedGroupDescriptions(groupsScenes), nil
+}
+
+func (t changesetTranslator) updateGroupIDDescriptions(value []*GroupDescriptionInput, field string) (*models.UpdateGroupDescriptions, error) {
+	if !t.hasField(field) {
+		return nil, nil
+	}
+
+	groupsScenes, err := groupsDescriptionsFromGroupInput(value)
+	if err != nil {
+		return nil, err
+	}
+
+	return &models.UpdateGroupDescriptions{
+		Groups: groupsScenes,
+		Mode:   models.RelationshipUpdateModeSet,
+	}, nil
+}
+
+func (t changesetTranslator) updateGroupIDDescriptionsBulk(value *BulkUpdateGroupDescriptionsInput, field string) (*models.UpdateGroupDescriptions, error) {
+	if !t.hasField(field) || value == nil {
+		return nil, nil
+	}
+
+	groups, err := groupsDescriptionsFromGroupInput(value.Groups)
+	if err != nil {
+		return nil, err
+	}
+
+	return &models.UpdateGroupDescriptions{
+		Groups: groups,
+		Mode:   value.Mode,
+	}, nil
+}

internal/api/resolver.go

@@ -37,6 +37,7 @@ type Resolver struct {
 	sceneService   manager.SceneService
 	imageService   manager.ImageService
 	galleryService manager.GalleryService
+	groupService   manager.GroupService
 
 	hookExecutor hookExecutor
 }

internal/api/resolver_model_movie.go

@@ -5,7 +5,9 @@ import (
 
 	"github.com/stashapp/stash/internal/api/loaders"
 	"github.com/stashapp/stash/internal/api/urlbuilders"
+	"github.com/stashapp/stash/pkg/group"
 	"github.com/stashapp/stash/pkg/models"
+	"github.com/stashapp/stash/pkg/scene"
 )
 
 func (r *groupResolver) Date(ctx context.Context, obj *models.Group) (*string, error) {
@@ -71,6 +73,68 @@ func (r groupResolver) Tags(ctx context.Context, obj *models.Group) (ret []*mode
 	return ret, firstError(errs)
 }
 
+func (r groupResolver) relatedGroups(ctx context.Context, rgd models.RelatedGroupDescriptions) (ret []*GroupDescription, err error) {
+	// rgd must be loaded
+	gds := rgd.List()
+	ids := make([]int, len(gds))
+	for i, gd := range gds {
+		ids[i] = gd.GroupID
+	}
+
+	groups, errs := loaders.From(ctx).GroupByID.LoadAll(ids)
+
+	err = firstError(errs)
+	if err != nil {
+		return
+	}
+
+	ret = make([]*GroupDescription, len(groups))
+	for i, group := range groups {
+		ret[i] = &GroupDescription{Group: group}
+		d := gds[i].Description
+		if d != "" {
+			ret[i].Description = &d
+		}
+	}
+
+	return ret, firstError(errs)
+}
+
+func (r groupResolver) ContainingGroups(ctx context.Context, obj *models.Group) (ret []*GroupDescription, err error) {
+	if !obj.ContainingGroups.Loaded() {
+		if err := r.withReadTxn(ctx, func(ctx context.Context) error {
+			return obj.LoadContainingGroupIDs(ctx, r.repository.Group)
+		}); err != nil {
+			return nil, err
+		}
+	}
+
+	return r.relatedGroups(ctx, obj.ContainingGroups)
+}
+
+func (r groupResolver) SubGroups(ctx context.Context, obj *models.Group) (ret []*GroupDescription, err error) {
+	if !obj.SubGroups.Loaded() {
+		if err := r.withReadTxn(ctx, func(ctx context.Context) error {
+			return obj.LoadSubGroupIDs(ctx, r.repository.Group)
+		}); err != nil {
+			return nil, err
+		}
+	}
+
+	return r.relatedGroups(ctx, obj.SubGroups)
+}
+
+func (r *groupResolver) SubGroupCount(ctx context.Context, obj *models.Group, depth *int) (ret int, err error) {
+	if err := r.withReadTxn(ctx, func(ctx context.Context) error {
+		ret, err = group.CountByContainingGroupID(ctx, r.repository.Group, obj.ID, depth)
+		return err
+	}); err != nil {
+		return 0, err
+	}
+
+	return ret, nil
+}
+
 func (r *groupResolver) FrontImagePath(ctx context.Context, obj *models.Group) (*string, error) {
 	var hasImage bool
 	if err := r.withReadTxn(ctx, func(ctx context.Context) error {
@@ -106,9 +170,9 @@ func (r *groupResolver) BackImagePath(ctx context.Context, obj *models.Group) (*
 	return &imagePath, nil
 }
 
-func (r *groupResolver) SceneCount(ctx context.Context, obj *models.Group) (ret int, err error) {
+func (r *groupResolver) SceneCount(ctx context.Context, obj *models.Group, depth *int) (ret int, err error) {
 	if err := r.withReadTxn(ctx, func(ctx context.Context) error {
-		ret, err = r.repository.Scene.CountByGroupID(ctx, obj.ID)
+		ret, err = scene.CountByGroupID(ctx, r.repository.Scene, obj.ID, depth)
 		return err
 	}); err != nil {
 		return 0, err

internal/api/resolver_mutation_group.go

@@ -6,6 +6,7 @@ import (
 	"strconv"
 
 	"github.com/stashapp/stash/internal/static"
+	"github.com/stashapp/stash/pkg/group"
 	"github.com/stashapp/stash/pkg/models"
 	"github.com/stashapp/stash/pkg/plugin/hook"
 	"github.com/stashapp/stash/pkg/sliceutil/stringslice"
@@ -43,6 +44,16 @@ func groupFromGroupCreateInput(ctx context.Context, input GroupCreateInput) (*mo
 		return nil, fmt.Errorf("converting tag ids: %w", err)
 	}
 
+	newGroup.ContainingGroups, err = translator.groupIDDescriptions(input.ContainingGroups)
+	if err != nil {
+		return nil, fmt.Errorf("converting containing group ids: %w", err)
+	}
+
+	newGroup.SubGroups, err = translator.groupIDDescriptions(input.SubGroups)
+	if err != nil {
+		return nil, fmt.Errorf("converting containing group ids: %w", err)
+	}
+
 	if input.Urls != nil {
 		newGroup.URLs = models.NewRelatedStrings(input.Urls)
 	}
@@ -82,26 +93,10 @@ func (r *mutationResolver) GroupCreate(ctx context.Context, input GroupCreateInp
 
 	// Start the transaction and save the group
 	if err := r.withTxn(ctx, func(ctx context.Context) error {
-		qb := r.repository.Group
-
-		err = qb.Create(ctx, newGroup)
-		if err != nil {
+		if err = r.groupService.Create(ctx, newGroup, frontimageData, backimageData); err != nil {
 			return err
 		}
 
-		// update image table
-		if len(frontimageData) > 0 {
-			if err := qb.UpdateFrontImage(ctx, newGroup.ID, frontimageData); err != nil {
-				return err
-			}
-		}
-
-		if len(backimageData) > 0 {
-			if err := qb.UpdateBackImage(ctx, newGroup.ID, backimageData); err != nil {
-				return err
-			}
-		}
-
 		return nil
 	}); err != nil {
 		return nil, err
@@ -141,6 +136,18 @@ func groupPartialFromGroupUpdateInput(translator changesetTranslator, input Grou
 		return
 	}
 
+	updatedGroup.ContainingGroups, err = translator.updateGroupIDDescriptions(input.ContainingGroups, "containing_groups")
+	if err != nil {
+		err = fmt.Errorf("converting containing group ids: %w", err)
+		return
+	}
+
+	updatedGroup.SubGroups, err = translator.updateGroupIDDescriptions(input.SubGroups, "sub_groups")
+	if err != nil {
+		err = fmt.Errorf("converting containing group ids: %w", err)
+		return
+	}
+
 	updatedGroup.URLs = translator.updateStrings(input.Urls, "urls")
 
 	return updatedGroup, nil
@@ -179,37 +186,31 @@ func (r *mutationResolver) GroupUpdate(ctx context.Context, input GroupUpdateInp
 		}
 	}
 
-	// Start the transaction and save the group
-	var group *models.Group
 	if err := r.withTxn(ctx, func(ctx context.Context) error {
-		qb := r.repository.Group
-		group, err = qb.UpdatePartial(ctx, groupID, updatedGroup)
+		frontImage := group.ImageInput{
+			Image: frontimageData,
+			Set:   frontImageIncluded,
+		}
+
+		backImage := group.ImageInput{
+			Image: backimageData,
+			Set:   backImageIncluded,
+		}
+
+		_, err = r.groupService.UpdatePartial(ctx, groupID, updatedGroup, frontImage, backImage)
 		if err != nil {
 			return err
 		}
 
-		// update image table
-		if frontImageIncluded {
-			if err := qb.UpdateFrontImage(ctx, group.ID, frontimageData); err != nil {
-				return err
-			}
-		}
-
-		if backImageIncluded {
-			if err := qb.UpdateBackImage(ctx, group.ID, backimageData); err != nil {
-				return err
-			}
-		}
-
 		return nil
 	}); err != nil {
 		return nil, err
 	}
 
 	// for backwards compatibility - run both movie and group hooks
-	r.hookExecutor.ExecutePostHooks(ctx, group.ID, hook.GroupUpdatePost, input, translator.getFields())
-	r.hookExecutor.ExecutePostHooks(ctx, group.ID, hook.MovieUpdatePost, input, translator.getFields())
-	return r.getGroup(ctx, group.ID)
+	r.hookExecutor.ExecutePostHooks(ctx, groupID, hook.GroupUpdatePost, input, translator.getFields())
+	r.hookExecutor.ExecutePostHooks(ctx, groupID, hook.MovieUpdatePost, input, translator.getFields())
+	return r.getGroup(ctx, groupID)
 }
 
 func groupPartialFromBulkGroupUpdateInput(translator changesetTranslator, input BulkGroupUpdateInput) (ret models.GroupPartial, err error) {
@@ -230,6 +231,18 @@ func groupPartialFromBulkGroupUpdateInput(translator changesetTranslator, input
 		return
 	}
 
+	updatedGroup.ContainingGroups, err = translator.updateGroupIDDescriptionsBulk(input.ContainingGroups, "containing_groups")
+	if err != nil {
+		err = fmt.Errorf("converting containing group ids: %w", err)
+		return
+	}
+
+	updatedGroup.SubGroups, err = translator.updateGroupIDDescriptionsBulk(input.SubGroups, "sub_groups")
+	if err != nil {
+		err = fmt.Errorf("converting containing group ids: %w", err)
+		return
+	}
+
 	updatedGroup.URLs = translator.optionalURLsBulk(input.Urls, nil)
 
 	return updatedGroup, nil
@@ -254,10 +267,8 @@ func (r *mutationResolver) BulkGroupUpdate(ctx context.Context, input BulkGroupU
 	ret := []*models.Group{}
 
 	if err := r.withTxn(ctx, func(ctx context.Context) error {
-		qb := r.repository.Group
-
 		for _, groupID := range groupIDs {
-			group, err := qb.UpdatePartial(ctx, groupID, updatedGroup)
+			group, err := r.groupService.UpdatePartial(ctx, groupID, updatedGroup, group.ImageInput{}, group.ImageInput{})
 			if err != nil {
 				return err
 			}
@@ -333,3 +344,70 @@ func (r *mutationResolver) GroupsDestroy(ctx context.Context, groupIDs []string)
 
 	return true, nil
 }
+
+func (r *mutationResolver) AddGroupSubGroups(ctx context.Context, input GroupSubGroupAddInput) (bool, error) {
+	groupID, err := strconv.Atoi(input.ContainingGroupID)
+	if err != nil {
+		return false, fmt.Errorf("converting group id: %w", err)
+	}
+
+	subGroups, err := groupsDescriptionsFromGroupInput(input.SubGroups)
+	if err != nil {
+		return false, fmt.Errorf("converting sub group ids: %w", err)
+	}
+
+	if err := r.withTxn(ctx, func(ctx context.Context) error {
+		return r.groupService.AddSubGroups(ctx, groupID, subGroups, input.InsertIndex)
+	}); err != nil {
+		return false, err
+	}
+
+	return true, nil
+}
+
+func (r *mutationResolver) RemoveGroupSubGroups(ctx context.Context, input GroupSubGroupRemoveInput) (bool, error) {
+	groupID, err := strconv.Atoi(input.ContainingGroupID)
+	if err != nil {
+		return false, fmt.Errorf("converting group id: %w", err)
+	}
+
+	subGroupIDs, err := stringslice.StringSliceToIntSlice(input.SubGroupIds)
+	if err != nil {
+		return false, fmt.Errorf("converting sub group ids: %w", err)
+	}
+
+	if err := r.withTxn(ctx, func(ctx context.Context) error {
+		return r.groupService.RemoveSubGroups(ctx, groupID, subGroupIDs)
+	}); err != nil {
+		return false, err
+	}
+
+	return true, nil
+}
+
+func (r *mutationResolver) ReorderSubGroups(ctx context.Context, input ReorderSubGroupsInput) (bool, error) {
+	groupID, err := strconv.Atoi(input.GroupID)
+	if err != nil {
+		return false, fmt.Errorf("converting group id: %w", err)
+	}
+
+	subGroupIDs, err := stringslice.StringSliceToIntSlice(input.SubGroupIds)
+	if err != nil {
+		return false, fmt.Errorf("converting sub group ids: %w", err)
+	}
+
+	insertPointID, err := strconv.Atoi(input.InsertAtID)
+	if err != nil {
+		return false, fmt.Errorf("converting insert at id: %w", err)
+	}
+
+	insertAfter := utils.IsTrue(input.InsertAfter)
+
+	if err := r.withTxn(ctx, func(ctx context.Context) error {
+		return r.groupService.ReorderSubGroups(ctx, groupID, subGroupIDs, insertPointID, insertAfter)
+	}); err != nil {
+		return false, err
+	}
+
+	return true, nil
+}

internal/api/server.go

@@ -158,11 +158,13 @@ func Initialize() (*Server, error) {
 	sceneService := mgr.SceneService
 	imageService := mgr.ImageService
 	galleryService := mgr.GalleryService
+	groupService := mgr.GroupService
 	resolver := &Resolver{
 		repository:     repo,
 		sceneService:   sceneService,
 		imageService:   imageService,
 		galleryService: galleryService,
+		groupService:   groupService,
 		hookExecutor:   pluginCache,
 	}
 

internal/dlna/cds.go

@@ -682,7 +682,7 @@ func (me *contentDirectoryService) getGroups() []interface{} {
 
 func (me *contentDirectoryService) getGroupScenes(paths []string, host string) []interface{} {
 	sceneFilter := &models.SceneFilterType{
-		Groups: &models.MultiCriterionInput{
+		Groups: &models.HierarchicalMultiCriterionInput{
 			Modifier: models.CriterionModifierIncludes,
 			Value:    []string{paths[0]},
 		},

internal/manager/init.go

@@ -17,6 +17,7 @@ import (
 	"github.com/stashapp/stash/pkg/ffmpeg"
 	"github.com/stashapp/stash/pkg/fsutil"
 	"github.com/stashapp/stash/pkg/gallery"
+	"github.com/stashapp/stash/pkg/group"
 	"github.com/stashapp/stash/pkg/image"
 	"github.com/stashapp/stash/pkg/job"
 	"github.com/stashapp/stash/pkg/logger"
@@ -67,6 +68,10 @@ func Initialize(cfg *config.Config, l *log.Logger) (*Manager, error) {
 		Folder:       db.Folder,
 	}
 
+	groupService := &group.Service{
+		Repository: db.Group,
+	}
+
 	sceneServer := &SceneServer{
 		TxnManager:       repo.TxnManager,
 		SceneCoverGetter: repo.Scene,
@@ -99,6 +104,7 @@ func Initialize(cfg *config.Config, l *log.Logger) (*Manager, error) {
 		SceneService:   sceneService,
 		ImageService:   imageService,
 		GalleryService: galleryService,
+		GroupService:   groupService,
 
 		scanSubs: &subscriptionManager{},
 	}

internal/manager/manager.go

@@ -66,6 +66,7 @@ type Manager struct {
 	SceneService   SceneService
 	ImageService   ImageService
 	GalleryService GalleryService
+	GroupService   GroupService
 
 	scanSubs *subscriptionManager
 }

internal/manager/repository.go

@@ -3,6 +3,7 @@ package manager
 import (
 	"context"
 
+	"github.com/stashapp/stash/pkg/group"
 	"github.com/stashapp/stash/pkg/image"
 	"github.com/stashapp/stash/pkg/models"
 	"github.com/stashapp/stash/pkg/scene"
@@ -33,3 +34,12 @@ type GalleryService interface {
 
 	Updated(ctx context.Context, galleryID int) error
 }
+
+type GroupService interface {
+	Create(ctx context.Context, group *models.Group, frontimageData []byte, backimageData []byte) error
+	UpdatePartial(ctx context.Context, id int, updatedGroup models.GroupPartial, frontImage group.ImageInput, backImage group.ImageInput) (*models.Group, error)
+
+	AddSubGroups(ctx context.Context, groupID int, subGroups []models.GroupIDDescription, insertIndex *int) error
+	RemoveSubGroups(ctx context.Context, groupID int, subGroupIDs []int) error
+	ReorderSubGroups(ctx context.Context, groupID int, subGroupIDs []int, insertPointID int, insertAfter bool) error
+}

internal/manager/task_export.go

@@ -1134,6 +1134,10 @@ func (t *ExportTask) exportGroup(ctx context.Context, wg *sync.WaitGroup, jobCha
 			logger.Errorf("[groups] <%s> error getting group urls: %v", m.Name, err)
 			continue
 		}
+		if err := m.LoadSubGroupIDs(ctx, r.Group); err != nil {
+			logger.Errorf("[groups] <%s> error getting group sub-groups: %v", m.Name, err)
+			continue
+		}
 
 		newGroupJSON, err := group.ToJSON(ctx, groupReader, studioReader, m)
 
@@ -1150,6 +1154,25 @@ func (t *ExportTask) exportGroup(ctx context.Context, wg *sync.WaitGroup, jobCha
 
 		newGroupJSON.Tags = tag.GetNames(tags)
 
+		subGroups := m.SubGroups.List()
+		if err := func() error {
+			for _, sg := range subGroups {
+				subGroup, err := groupReader.Find(ctx, sg.GroupID)
+				if err != nil {
+					return fmt.Errorf("error getting sub group: %v", err)
+				}
+
+				newGroupJSON.SubGroups = append(newGroupJSON.SubGroups, jsonschema.SubGroupDescription{
+					// TODO - this won't be unique
+					Group:       subGroup.Name,
+					Description: sg.Description,
+				})
+			}
+			return nil
+		}(); err != nil {
+			logger.Errorf("[groups] <%s> %v", m.Name, err)
+		}
+
 		if t.includeDependencies {
 			if m.StudioID != nil {
 				t.studios.IDs = sliceutil.AppendUnique(t.studios.IDs, *m.StudioID)

internal/manager/task_import.go

@@ -327,6 +327,7 @@ func (t *ImportTask) importStudio(ctx context.Context, studioJSON *jsonschema.St
 
 func (t *ImportTask) ImportGroups(ctx context.Context) {
 	logger.Info("[groups] importing")
+	pendingSubs := make(map[string][]*jsonschema.Group)
 
 	path := t.json.json.Groups
 	files, err := os.ReadDir(path)
@@ -351,7 +352,38 @@ func (t *ImportTask) ImportGroups(ctx context.Context) {
 		logger.Progressf("[groups] %d of %d", index, len(files))
 
 		if err := r.WithTxn(ctx, func(ctx context.Context) error {
-			groupImporter := &group.Importer{
+			return t.importGroup(ctx, groupJSON, pendingSubs, false)
+		}); err != nil {
+			var subError group.SubGroupNotExistError
+			if errors.As(err, &subError) {
+				missingSub := subError.MissingSubGroup()
+				pendingSubs[missingSub] = append(pendingSubs[missingSub], groupJSON)
+				continue
+			}
+
+			logger.Errorf("[groups] <%s> failed to import: %v", fi.Name(), err)
+			continue
+		}
+	}
+
+	for _, s := range pendingSubs {
+		for _, orphanGroupJSON := range s {
+			if err := r.WithTxn(ctx, func(ctx context.Context) error {
+				return t.importGroup(ctx, orphanGroupJSON, nil, true)
+			}); err != nil {
+				logger.Errorf("[groups] <%s> failed to create: %v", orphanGroupJSON.Name, err)
+				continue
+			}
+		}
+	}
+
+	logger.Info("[groups] import complete")
+}
+
+func (t *ImportTask) importGroup(ctx context.Context, groupJSON *jsonschema.Group, pendingSub map[string][]*jsonschema.Group, fail bool) error {
+	r := t.repository
+
+	importer := &group.Importer{
 		ReaderWriter:        r.Group,
 		StudioWriter:        r.Studio,
 		TagWriter:           r.Tag,
@@ -359,14 +391,31 @@ func (t *ImportTask) ImportGroups(ctx context.Context) {
 		MissingRefBehaviour: t.MissingRefBehaviour,
 	}
 
-			return performImport(ctx, groupImporter, t.DuplicateBehaviour)
-		}); err != nil {
-			logger.Errorf("[groups] <%s> import failed: %v", fi.Name(), err)
+	// first phase: return error if parent does not exist
+	if !fail {
+		importer.MissingRefBehaviour = models.ImportMissingRefEnumFail
+	}
+
+	if err := performImport(ctx, importer, t.DuplicateBehaviour); err != nil {
+		return err
+	}
+
+	for _, containingGroupJSON := range pendingSub[groupJSON.Name] {
+		if err := t.importGroup(ctx, containingGroupJSON, pendingSub, fail); err != nil {
+			var subError group.SubGroupNotExistError
+			if errors.As(err, &subError) {
+				missingSub := subError.MissingSubGroup()
+				pendingSub[missingSub] = append(pendingSub[missingSub], containingGroupJSON)
 				continue
 			}
+
+			return fmt.Errorf("failed to create containing group <%s>: %v", containingGroupJSON.Name, err)
+		}
 	}
 
-	logger.Info("[groups] import complete")
+	delete(pendingSub, groupJSON.Name)
+
+	return nil
 }
 
 func (t *ImportTask) ImportFiles(ctx context.Context) {

pkg/group/create.go

@@ -0,0 +1,41 @@
+package group
+
+import (
+	"context"
+	"errors"
+
+	"github.com/stashapp/stash/pkg/models"
+)
+
+var (
+	ErrEmptyName     = errors.New("name cannot be empty")
+	ErrHierarchyLoop = errors.New("a group cannot be contained by one of its subgroups")
+)
+
+func (s *Service) Create(ctx context.Context, group *models.Group, frontimageData []byte, backimageData []byte) error {
+	r := s.Repository
+
+	if err := s.validateCreate(ctx, group); err != nil {
+		return err
+	}
+
+	err := r.Create(ctx, group)
+	if err != nil {
+		return err
+	}
+
+	// update image table
+	if len(frontimageData) > 0 {
+		if err := r.UpdateFrontImage(ctx, group.ID, frontimageData); err != nil {
+			return err
+		}
+	}
+
+	if len(backimageData) > 0 {
+		if err := r.UpdateBackImage(ctx, group.ID, backimageData); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

pkg/group/import.go

@@ -16,6 +16,18 @@ type ImporterReaderWriter interface {
 	FindByName(ctx context.Context, name string, nocase bool) (*models.Group, error)
 }
 
+type SubGroupNotExistError struct {
+	missingSubGroup string
+}
+
+func (e SubGroupNotExistError) Error() string {
+	return fmt.Sprintf("sub group <%s> does not exist", e.missingSubGroup)
+}
+
+func (e SubGroupNotExistError) MissingSubGroup() string {
+	return e.missingSubGroup
+}
+
 type Importer struct {
 	ReaderWriter        ImporterReaderWriter
 	StudioWriter        models.StudioFinderCreator
@@ -202,6 +214,22 @@ func (i *Importer) createStudio(ctx context.Context, name string) (int, error) {
 }
 
 func (i *Importer) PostImport(ctx context.Context, id int) error {
+	subGroups, err := i.getSubGroups(ctx)
+	if err != nil {
+		return err
+	}
+
+	if len(subGroups) > 0 {
+		if _, err := i.ReaderWriter.UpdatePartial(ctx, id, models.GroupPartial{
+			SubGroups: &models.UpdateGroupDescriptions{
+				Groups: subGroups,
+				Mode:   models.RelationshipUpdateModeSet,
+			},
+		}); err != nil {
+			return fmt.Errorf("error setting parents: %v", err)
+		}
+	}
+
 	if len(i.frontImageData) > 0 {
 		if err := i.ReaderWriter.UpdateFrontImage(ctx, id, i.frontImageData); err != nil {
 			return fmt.Errorf("error setting group front image: %v", err)
@@ -256,3 +284,53 @@ func (i *Importer) Update(ctx context.Context, id int) error {
 
 	return nil
 }
+
+func (i *Importer) getSubGroups(ctx context.Context) ([]models.GroupIDDescription, error) {
+	var subGroups []models.GroupIDDescription
+	for _, subGroup := range i.Input.SubGroups {
+		group, err := i.ReaderWriter.FindByName(ctx, subGroup.Group, false)
+		if err != nil {
+			return nil, fmt.Errorf("error finding parent by name: %v", err)
+		}
+
+		if group == nil {
+			if i.MissingRefBehaviour == models.ImportMissingRefEnumFail {
+				return nil, SubGroupNotExistError{missingSubGroup: subGroup.Group}
+			}
+
+			if i.MissingRefBehaviour == models.ImportMissingRefEnumIgnore {
+				continue
+			}
+
+			if i.MissingRefBehaviour == models.ImportMissingRefEnumCreate {
+				parentID, err := i.createSubGroup(ctx, subGroup.Group)
+				if err != nil {
+					return nil, err
+				}
+				subGroups = append(subGroups, models.GroupIDDescription{
+					GroupID:     parentID,
+					Description: subGroup.Description,
+				})
+			}
+		} else {
+			subGroups = append(subGroups, models.GroupIDDescription{
+				GroupID:     group.ID,
+				Description: subGroup.Description,
+			})
+		}
+	}
+
+	return subGroups, nil
+}
+
+func (i *Importer) createSubGroup(ctx context.Context, name string) (int, error) {
+	newGroup := models.NewGroup()
+	newGroup.Name = name
+
+	err := i.ReaderWriter.Create(ctx, &newGroup)
+	if err != nil {
+		return 0, err
+	}
+
+	return newGroup.ID, nil
+}

pkg/group/query.go

@@ -30,3 +30,15 @@ func CountByTagID(ctx context.Context, r models.GroupQueryer, id int, depth *int
 
 	return r.QueryCount(ctx, filter, nil)
 }
+
+func CountByContainingGroupID(ctx context.Context, r models.GroupQueryer, id int, depth *int) (int, error) {
+	filter := &models.GroupFilterType{
+		ContainingGroups: &models.HierarchicalMultiCriterionInput{
+			Value:    []string{strconv.Itoa(id)},
+			Modifier: models.CriterionModifierIncludes,
+			Depth:    depth,
+		},
+	}
+
+	return r.QueryCount(ctx, filter, nil)
+}

pkg/group/reorder.go

@@ -0,0 +1,33 @@
+package group
+
+import (
+	"context"
+	"errors"
+
+	"github.com/stashapp/stash/pkg/models"
+)
+
+var ErrInvalidInsertIndex = errors.New("invalid insert index")
+
+func (s *Service) ReorderSubGroups(ctx context.Context, groupID int, subGroupIDs []int, insertPointID int, insertAfter bool) error {
+	// get the group
+	existing, err := s.Repository.Find(ctx, groupID)
+	if err != nil {
+		return err
+	}
+
+	// ensure it exists
+	if existing == nil {
+		return models.ErrNotFound
+	}
+
+	// TODO - ensure the subgroups exist in the group
+
+	// ensure the insert index is valid
+	if insertPointID < 0 {
+		return ErrInvalidInsertIndex
+	}
+
+	// reorder the subgroups
+	return s.Repository.ReorderSubGroups(ctx, groupID, subGroupIDs, insertPointID, insertAfter)
+}

pkg/group/service.go

@@ -0,0 +1,46 @@
+package group
+
+import (
+	"context"
+
+	"github.com/stashapp/stash/pkg/models"
+)
+
+type CreatorUpdater interface {
+	models.GroupGetter
+	models.GroupCreator
+	models.GroupUpdater
+
+	models.ContainingGroupLoader
+	models.SubGroupLoader
+
+	AnscestorFinder
+	SubGroupIDFinder
+	SubGroupAdder
+	SubGroupRemover
+	SubGroupReorderer
+}
+
+type AnscestorFinder interface {
+	FindInAncestors(ctx context.Context, ascestorIDs []int, ids []int) ([]int, error)
+}
+
+type SubGroupIDFinder interface {
+	FindSubGroupIDs(ctx context.Context, containingID int, ids []int) ([]int, error)
+}
+
+type SubGroupAdder interface {
+	AddSubGroups(ctx context.Context, groupID int, subGroups []models.GroupIDDescription, insertIndex *int) error
+}
+
+type SubGroupRemover interface {
+	RemoveSubGroups(ctx context.Context, groupID int, subGroupIDs []int) error
+}
+
+type SubGroupReorderer interface {
+	ReorderSubGroups(ctx context.Context, groupID int, subGroupIDs []int, insertID int, insertAfter bool) error
+}
+
+type Service struct {
+	Repository CreatorUpdater
+}

pkg/group/update.go

@@ -0,0 +1,112 @@
+package group
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/stashapp/stash/pkg/models"
+	"github.com/stashapp/stash/pkg/sliceutil"
+)
+
+type SubGroupAlreadyInGroupError struct {
+	GroupIDs []int
+}
+
+func (e *SubGroupAlreadyInGroupError) Error() string {
+	return fmt.Sprintf("subgroups with IDs %v already in group", e.GroupIDs)
+}
+
+type ImageInput struct {
+	Image []byte
+	Set   bool
+}
+
+func (s *Service) UpdatePartial(ctx context.Context, id int, updatedGroup models.GroupPartial, frontImage ImageInput, backImage ImageInput) (*models.Group, error) {
+	if err := s.validateUpdate(ctx, id, updatedGroup); err != nil {
+		return nil, err
+	}
+
+	r := s.Repository
+
+	group, err := r.UpdatePartial(ctx, id, updatedGroup)
+	if err != nil {
+		return nil, err
+	}
+
+	// update image table
+	if frontImage.Set {
+		if err := r.UpdateFrontImage(ctx, id, frontImage.Image); err != nil {
+			return nil, err
+		}
+	}
+
+	if backImage.Set {
+		if err := r.UpdateBackImage(ctx, id, backImage.Image); err != nil {
+			return nil, err
+		}
+	}
+
+	return group, nil
+}
+
+func (s *Service) AddSubGroups(ctx context.Context, groupID int, subGroups []models.GroupIDDescription, insertIndex *int) error {
+	// get the group
+	existing, err := s.Repository.Find(ctx, groupID)
+	if err != nil {
+		return err
+	}
+
+	// ensure it exists
+	if existing == nil {
+		return models.ErrNotFound
+	}
+
+	// ensure the subgroups aren't already sub-groups of the group
+	subGroupIDs := sliceutil.Map(subGroups, func(sg models.GroupIDDescription) int {
+		return sg.GroupID
+	})
+
+	existingSubGroupIDs, err := s.Repository.FindSubGroupIDs(ctx, groupID, subGroupIDs)
+	if err != nil {
+		return err
+	}
+
+	if len(existingSubGroupIDs) > 0 {
+		return &SubGroupAlreadyInGroupError{
+			GroupIDs: existingSubGroupIDs,
+		}
+	}
+
+	// validate the hierarchy
+	d := &models.UpdateGroupDescriptions{
+		Groups: subGroups,
+		Mode:   models.RelationshipUpdateModeAdd,
+	}
+	if err := s.validateUpdateGroupHierarchy(ctx, existing, nil, d); err != nil {
+		return err
+	}
+
+	// validate insert index
+	if insertIndex != nil && *insertIndex < 0 {
+		return ErrInvalidInsertIndex
+	}
+
+	// add the subgroups
+	return s.Repository.AddSubGroups(ctx, groupID, subGroups, insertIndex)
+}
+
+func (s *Service) RemoveSubGroups(ctx context.Context, groupID int, subGroupIDs []int) error {
+	// get the group
+	existing, err := s.Repository.Find(ctx, groupID)
+	if err != nil {
+		return err
+	}
+
+	// ensure it exists
+	if existing == nil {
+		return models.ErrNotFound
+	}
+
+	// add the subgroups
+	return s.Repository.RemoveSubGroups(ctx, groupID, subGroupIDs)
+}

pkg/group/validate.go

@@ -0,0 +1,117 @@
+package group
+
+import (
+	"context"
+	"strings"
+
+	"github.com/stashapp/stash/pkg/models"
+	"github.com/stashapp/stash/pkg/sliceutil"
+)
+
+func (s *Service) validateCreate(ctx context.Context, group *models.Group) error {
+	if err := validateName(group.Name); err != nil {
+		return err
+	}
+
+	containingIDs := group.ContainingGroups.IDs()
+	subIDs := group.SubGroups.IDs()
+
+	if err := s.validateGroupHierarchy(ctx, containingIDs, subIDs); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (s *Service) validateUpdate(ctx context.Context, id int, partial models.GroupPartial) error {
+	// get the existing group - ensure it exists
+	existing, err := s.Repository.Find(ctx, id)
+	if err != nil {
+		return err
+	}
+
+	if existing == nil {
+		return models.ErrNotFound
+	}
+
+	if partial.Name.Set {
+		if err := validateName(partial.Name.Value); err != nil {
+			return err
+		}
+	}
+
+	if err := s.validateUpdateGroupHierarchy(ctx, existing, partial.ContainingGroups, partial.SubGroups); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func validateName(n string) error {
+	// ensure name is not empty
+	if strings.TrimSpace(n) == "" {
+		return ErrEmptyName
+	}
+
+	return nil
+}
+
+func (s *Service) validateGroupHierarchy(ctx context.Context, containingIDs []int, subIDs []int) error {
+	// only need to validate if both are non-empty
+	if len(containingIDs) == 0 || len(subIDs) == 0 {
+		return nil
+	}
+
+	// ensure none of the containing groups are in the sub groups
+	found, err := s.Repository.FindInAncestors(ctx, containingIDs, subIDs)
+	if err != nil {
+		return err
+	}
+
+	if len(found) > 0 {
+		return ErrHierarchyLoop
+	}
+
+	return nil
+}
+
+func (s *Service) validateUpdateGroupHierarchy(ctx context.Context, existing *models.Group, containingGroups *models.UpdateGroupDescriptions, subGroups *models.UpdateGroupDescriptions) error {
+	// no need to validate if there are no changes
+	if containingGroups == nil && subGroups == nil {
+		return nil
+	}
+
+	if err := existing.LoadContainingGroupIDs(ctx, s.Repository); err != nil {
+		return err
+	}
+	existingContainingGroups := existing.ContainingGroups.List()
+
+	if err := existing.LoadSubGroupIDs(ctx, s.Repository); err != nil {
+		return err
+	}
+	existingSubGroups := existing.SubGroups.List()
+
+	effectiveContainingGroups := existingContainingGroups
+	if containingGroups != nil {
+		effectiveContainingGroups = containingGroups.Apply(existingContainingGroups)
+	}
+
+	effectiveSubGroups := existingSubGroups
+	if subGroups != nil {
+		effectiveSubGroups = subGroups.Apply(existingSubGroups)
+	}
+
+	containingIDs := idsFromGroupDescriptions(effectiveContainingGroups)
+	subIDs := idsFromGroupDescriptions(effectiveSubGroups)
+
+	// ensure we haven't set the group as a subgroup of itself
+	if sliceutil.Contains(containingIDs, existing.ID) || sliceutil.Contains(subIDs, existing.ID) {
+		return ErrHierarchyLoop
+	}
+
+	return s.validateGroupHierarchy(ctx, containingIDs, subIDs)
+}
+
+func idsFromGroupDescriptions(v []models.GroupIDDescription) []int {
+	return sliceutil.Map(v, func(g models.GroupIDDescription) int { return g.GroupID })
+}

pkg/models/group.go

@@ -23,6 +23,14 @@ type GroupFilterType struct {
 	TagCount *IntCriterionInput `json:"tag_count"`
 	// Filter by date
 	Date *DateCriterionInput `json:"date"`
+	// Filter by containing groups
+	ContainingGroups *HierarchicalMultiCriterionInput `json:"containing_groups"`
+	// Filter by sub groups
+	SubGroups *HierarchicalMultiCriterionInput `json:"sub_groups"`
+	// Filter by number of containing groups the group has
+	ContainingGroupCount *IntCriterionInput `json:"containing_group_count"`
+	// Filter by number of sub-groups the group has
+	SubGroupCount *IntCriterionInput `json:"sub_group_count"`
 	// Filter by related scenes that meet this criteria
 	ScenesFilter *SceneFilterType `json:"scenes_filter"`
 	// Filter by related studios that meet this criteria

pkg/models/jsonschema/group.go

@@ -11,6 +11,11 @@ import (
 	"github.com/stashapp/stash/pkg/models/json"
 )
 
+type SubGroupDescription struct {
+	Group       string `json:"name,omitempty"`
+	Description string `json:"description,omitempty"`
+}
+
 type Group struct {
 	Name       string                `json:"name,omitempty"`
 	Aliases    string                `json:"aliases,omitempty"`
@@ -24,6 +29,7 @@ type Group struct {
 	URLs       []string              `json:"urls,omitempty"`
 	Studio     string                `json:"studio,omitempty"`
 	Tags       []string              `json:"tags,omitempty"`
+	SubGroups  []SubGroupDescription `json:"sub_groups,omitempty"`
 	CreatedAt  json.JSONTime         `json:"created_at,omitempty"`
 	UpdatedAt  json.JSONTime         `json:"updated_at,omitempty"`
 

pkg/models/mocks/GroupReaderWriter.go

@@ -289,6 +289,29 @@ func (_m *GroupReaderWriter) GetBackImage(ctx context.Context, groupID int) ([]b
 	return r0, r1
 }
 
+// GetContainingGroupDescriptions provides a mock function with given fields: ctx, id
+func (_m *GroupReaderWriter) GetContainingGroupDescriptions(ctx context.Context, id int) ([]models.GroupIDDescription, error) {
+	ret := _m.Called(ctx, id)
+
+	var r0 []models.GroupIDDescription
+	if rf, ok := ret.Get(0).(func(context.Context, int) []models.GroupIDDescription); ok {
+		r0 = rf(ctx, id)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]models.GroupIDDescription)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, int) error); ok {
+		r1 = rf(ctx, id)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // GetFrontImage provides a mock function with given fields: ctx, groupID
 func (_m *GroupReaderWriter) GetFrontImage(ctx context.Context, groupID int) ([]byte, error) {
 	ret := _m.Called(ctx, groupID)
@@ -312,6 +335,29 @@ func (_m *GroupReaderWriter) GetFrontImage(ctx context.Context, groupID int) ([]
 	return r0, r1
 }
 
+// GetSubGroupDescriptions provides a mock function with given fields: ctx, id
+func (_m *GroupReaderWriter) GetSubGroupDescriptions(ctx context.Context, id int) ([]models.GroupIDDescription, error) {
+	ret := _m.Called(ctx, id)
+
+	var r0 []models.GroupIDDescription
+	if rf, ok := ret.Get(0).(func(context.Context, int) []models.GroupIDDescription); ok {
+		r0 = rf(ctx, id)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]models.GroupIDDescription)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, int) error); ok {
+		r1 = rf(ctx, id)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // GetTagIDs provides a mock function with given fields: ctx, relatedID
 func (_m *GroupReaderWriter) GetTagIDs(ctx context.Context, relatedID int) ([]int, error) {
 	ret := _m.Called(ctx, relatedID)

pkg/models/model_group.go

@@ -21,6 +21,9 @@ type Group struct {
 
 	URLs   RelatedStrings `json:"urls"`
 	TagIDs RelatedIDs     `json:"tag_ids"`
+
+	ContainingGroups RelatedGroupDescriptions `json:"containing_groups"`
+	SubGroups        RelatedGroupDescriptions `json:"sub_groups"`
 }
 
 func NewGroup() Group {
@@ -43,6 +46,18 @@ func (m *Group) LoadTagIDs(ctx context.Context, l TagIDLoader) error {
 	})
 }
 
+func (m *Group) LoadContainingGroupIDs(ctx context.Context, l ContainingGroupLoader) error {
+	return m.ContainingGroups.load(func() ([]GroupIDDescription, error) {
+		return l.GetContainingGroupDescriptions(ctx, m.ID)
+	})
+}
+
+func (m *Group) LoadSubGroupIDs(ctx context.Context, l SubGroupLoader) error {
+	return m.SubGroups.load(func() ([]GroupIDDescription, error) {
+		return l.GetSubGroupDescriptions(ctx, m.ID)
+	})
+}
+
 type GroupPartial struct {
 	Name     OptionalString
 	Aliases  OptionalString
@@ -55,6 +70,8 @@ type GroupPartial struct {
 	Synopsis         OptionalString
 	URLs             *UpdateStrings
 	TagIDs           *UpdateIDs
+	ContainingGroups *UpdateGroupDescriptions
+	SubGroups        *UpdateGroupDescriptions
 	CreatedAt        OptionalTime
 	UpdatedAt        OptionalTime
 }

pkg/models/model_joins.go

@@ -68,3 +68,8 @@ func GroupsScenesFromInput(input []SceneMovieInput) ([]GroupsScenes, error) {
 
 	return ret, nil
 }
+
+type GroupIDDescription struct {
+	GroupID     int    `json:"group_id"`
+	Description string `json:"description"`
+}

pkg/models/relationships.go

@@ -2,6 +2,8 @@ package models
 
 import (
 	"context"
+
+	"github.com/stashapp/stash/pkg/sliceutil"
 )
 
 type SceneIDLoader interface {
@@ -37,6 +39,14 @@ type SceneGroupLoader interface {
 	GetGroups(ctx context.Context, id int) ([]GroupsScenes, error)
 }
 
+type ContainingGroupLoader interface {
+	GetContainingGroupDescriptions(ctx context.Context, id int) ([]GroupIDDescription, error)
+}
+
+type SubGroupLoader interface {
+	GetSubGroupDescriptions(ctx context.Context, id int) ([]GroupIDDescription, error)
+}
+
 type StashIDLoader interface {
 	GetStashIDs(ctx context.Context, relatedID int) ([]StashID, error)
 }
@@ -185,6 +195,82 @@ func (r *RelatedGroups) load(fn func() ([]GroupsScenes, error)) error {
 	return nil
 }
 
+type RelatedGroupDescriptions struct {
+	list []GroupIDDescription
+}
+
+// NewRelatedGroups returns a loaded RelateGroups object with the provided groups.
+// Loaded will return true when called on the returned object if the provided slice is not nil.
+func NewRelatedGroupDescriptions(list []GroupIDDescription) RelatedGroupDescriptions {
+	return RelatedGroupDescriptions{
+		list: list,
+	}
+}
+
+// Loaded returns true if the relationship has been loaded.
+func (r RelatedGroupDescriptions) Loaded() bool {
+	return r.list != nil
+}
+
+func (r RelatedGroupDescriptions) mustLoaded() {
+	if !r.Loaded() {
+		panic("list has not been loaded")
+	}
+}
+
+// List returns the related Groups. Panics if the relationship has not been loaded.
+func (r RelatedGroupDescriptions) List() []GroupIDDescription {
+	r.mustLoaded()
+
+	return r.list
+}
+
+// List returns the related Groups. Panics if the relationship has not been loaded.
+func (r RelatedGroupDescriptions) IDs() []int {
+	r.mustLoaded()
+
+	return sliceutil.Map(r.list, func(d GroupIDDescription) int { return d.GroupID })
+}
+
+// Add adds the provided ids to the list. Panics if the relationship has not been loaded.
+func (r *RelatedGroupDescriptions) Add(groups ...GroupIDDescription) {
+	r.mustLoaded()
+
+	r.list = append(r.list, groups...)
+}
+
+// ForID returns the GroupsScenes object for the given group ID. Returns nil if not found.
+func (r *RelatedGroupDescriptions) ForID(id int) *GroupIDDescription {
+	r.mustLoaded()
+
+	for _, v := range r.list {
+		if v.GroupID == id {
+			return &v
+		}
+	}
+
+	return nil
+}
+
+func (r *RelatedGroupDescriptions) load(fn func() ([]GroupIDDescription, error)) error {
+	if r.Loaded() {
+		return nil
+	}
+
+	ids, err := fn()
+	if err != nil {
+		return err
+	}
+
+	if ids == nil {
+		ids = []GroupIDDescription{}
+	}
+
+	r.list = ids
+
+	return nil
+}
+
 type RelatedStashIDs struct {
 	list []StashID
 }

pkg/models/repository_group.go

@@ -66,6 +66,8 @@ type GroupReader interface {
 	GroupCounter
 	URLLoader
 	TagIDLoader
+	ContainingGroupLoader
+	SubGroupLoader
 
 	All(ctx context.Context) ([]*Group, error)
 	GetFrontImage(ctx context.Context, groupID int) ([]byte, error)

pkg/models/repository_scene.go

@@ -37,10 +37,7 @@ type SceneQueryer interface {
 type SceneCounter interface {
 	Count(ctx context.Context) (int, error)
 	CountByPerformerID(ctx context.Context, performerID int) (int, error)
-	CountByGroupID(ctx context.Context, groupID int) (int, error)
 	CountByFileID(ctx context.Context, fileID FileID) (int, error)
-	CountByStudioID(ctx context.Context, studioID int) (int, error)
-	CountByTagID(ctx context.Context, tagID int) (int, error)
 	CountMissingChecksum(ctx context.Context) (int, error)
 	CountMissingOSHash(ctx context.Context) (int, error)
 	OCountByPerformerID(ctx context.Context, performerID int) (int, error)

pkg/models/scene.go

@@ -56,7 +56,7 @@ type SceneFilterType struct {
 	// Filter to only include scenes with this studio
 	Studios *HierarchicalMultiCriterionInput `json:"studios"`
 	// Filter to only include scenes with this group
-	Groups *MultiCriterionInput `json:"groups"`
+	Groups *HierarchicalMultiCriterionInput `json:"groups"`
 	// Filter to only include scenes with this movie
 	Movies *MultiCriterionInput `json:"movies"`
 	// Filter to only include scenes with this gallery

pkg/models/update.go

@@ -133,3 +133,68 @@ func applyUpdate[T comparable](values []T, mode RelationshipUpdateMode, existing
 
 	return nil
 }
+
+type UpdateGroupDescriptions struct {
+	Groups []GroupIDDescription   `json:"groups"`
+	Mode   RelationshipUpdateMode `json:"mode"`
+}
+
+// Apply applies the update to a list of existing ids, returning the result.
+func (u *UpdateGroupDescriptions) Apply(existing []GroupIDDescription) []GroupIDDescription {
+	if u == nil {
+		return existing
+	}
+
+	switch u.Mode {
+	case RelationshipUpdateModeAdd:
+		return u.applyAdd(existing)
+	case RelationshipUpdateModeRemove:
+		return u.applyRemove(existing)
+	case RelationshipUpdateModeSet:
+		return u.Groups
+	}
+
+	return nil
+}
+
+func (u *UpdateGroupDescriptions) applyAdd(existing []GroupIDDescription) []GroupIDDescription {
+	// overwrite any existing values with the same id
+	ret := append([]GroupIDDescription{}, existing...)
+	for _, v := range u.Groups {
+		found := false
+		for i, vv := range ret {
+			if vv.GroupID == v.GroupID {
+				ret[i] = v
+				found = true
+				break
+			}
+		}
+
+		if !found {
+			ret = append(ret, v)
+		}
+	}
+
+	return ret
+}
+
+func (u *UpdateGroupDescriptions) applyRemove(existing []GroupIDDescription) []GroupIDDescription {
+	// remove any existing values with the same id
+	var ret []GroupIDDescription
+	for _, v := range existing {
+		found := false
+		for _, vv := range u.Groups {
+			if vv.GroupID == v.GroupID {
+				found = true
+				break
+			}
+		}
+
+		// if not found in the remove list, keep it
+		if !found {
+			ret = append(ret, v)
+		}
+	}
+
+	return ret
+}

pkg/scene/query.go

@@ -144,3 +144,15 @@ func CountByTagID(ctx context.Context, r models.SceneQueryer, id int, depth *int
 
 	return r.QueryCount(ctx, filter, nil)
 }
+
+func CountByGroupID(ctx context.Context, r models.SceneQueryer, id int, depth *int) (int, error) {
+	filter := &models.SceneFilterType{
+		Groups: &models.HierarchicalMultiCriterionInput{
+			Value:    []string{strconv.Itoa(id)},
+			Modifier: models.CriterionModifierIncludes,
+			Depth:    depth,
+		},
+	}
+
+	return r.QueryCount(ctx, filter, nil)
+}

pkg/sliceutil/collections.go

@@ -146,7 +146,7 @@ func Filter[T any](vs []T, f func(T) bool) []T {
 	return ret
 }
 
-// Filter returns the result of applying f to each element of the vs slice.
+// Map returns the result of applying f to each element of the vs slice.
 func Map[T any, V any](vs []T, f func(T) V) []V {
 	ret := make([]V, len(vs))
 	for i, v := range vs {

pkg/sqlite/database.go

@@ -30,7 +30,7 @@ const (
 	dbConnTimeout = 30
 )
 
-var appSchemaVersion uint = 66
+var appSchemaVersion uint = 67
 
 //go:embed migrations/*.sql
 var migrationsBox embed.FS

pkg/sqlite/filter_hierarchical.go

@@ -0,0 +1,222 @@
+package sqlite
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/stashapp/stash/pkg/models"
+	"github.com/stashapp/stash/pkg/utils"
+)
+
+// hierarchicalRelationshipHandler provides handlers for parent, children, parent count, and child count criteria.
+type hierarchicalRelationshipHandler struct {
+	primaryTable  string
+	relationTable string
+	aliasPrefix   string
+	parentIDCol   string
+	childIDCol    string
+}
+
+func (h hierarchicalRelationshipHandler) validateModifier(m models.CriterionModifier) error {
+	switch m {
+	case models.CriterionModifierIncludesAll, models.CriterionModifierIncludes, models.CriterionModifierExcludes, models.CriterionModifierIsNull, models.CriterionModifierNotNull:
+		// valid
+		return nil
+	default:
+		return fmt.Errorf("invalid modifier %s", m)
+	}
+}
+
+func (h hierarchicalRelationshipHandler) handleNullNotNull(f *filterBuilder, m models.CriterionModifier, isParents bool) {
+	var notClause string
+	if m == models.CriterionModifierNotNull {
+		notClause = "NOT"
+	}
+
+	as := h.aliasPrefix + "_parents"
+	col := h.childIDCol
+	if !isParents {
+		as = h.aliasPrefix + "_children"
+		col = h.parentIDCol
+	}
+
+	// Based on:
+	// f.addLeftJoin("tags_relations", "parent_relations", "tags.id = parent_relations.child_id")
+	// f.addWhere(fmt.Sprintf("parent_relations.parent_id IS %s NULL", notClause))
+
+	f.addLeftJoin(h.relationTable, as, fmt.Sprintf("%s.id = %s.%s", h.primaryTable, as, col))
+	f.addWhere(fmt.Sprintf("%s.%s IS %s NULL", as, col, notClause))
+}
+
+func (h hierarchicalRelationshipHandler) parentsAlias() string {
+	return h.aliasPrefix + "_parents"
+}
+
+func (h hierarchicalRelationshipHandler) childrenAlias() string {
+	return h.aliasPrefix + "_children"
+}
+
+func (h hierarchicalRelationshipHandler) valueQuery(value []string, depth int, alias string, isParents bool) string {
+	var depthCondition string
+	if depth != -1 {
+		depthCondition = fmt.Sprintf("WHERE depth < %d", depth)
+	}
+
+	queryTempl := `{alias} AS (
+SELECT {root_id_col} AS root_id, {item_id_col} AS item_id, 0 AS depth FROM {relation_table} WHERE {root_id_col} IN` + getInBinding(len(value)) + `
+UNION
+SELECT root_id, {item_id_col}, depth + 1 FROM {relation_table} INNER JOIN {alias} ON item_id = {root_id_col} ` + depthCondition + `
+)`
+
+	var queryMap utils.StrFormatMap
+	if isParents {
+		queryMap = utils.StrFormatMap{
+			"root_id_col": h.parentIDCol,
+			"item_id_col": h.childIDCol,
+		}
+	} else {
+		queryMap = utils.StrFormatMap{
+			"root_id_col": h.childIDCol,
+			"item_id_col": h.parentIDCol,
+		}
+	}
+
+	queryMap["alias"] = alias
+	queryMap["relation_table"] = h.relationTable
+
+	return utils.StrFormat(queryTempl, queryMap)
+}
+
+func (h hierarchicalRelationshipHandler) handleValues(f *filterBuilder, c models.HierarchicalMultiCriterionInput, isParents bool, aliasSuffix string) {
+	if len(c.Value) == 0 {
+		return
+	}
+
+	var args []interface{}
+	for _, val := range c.Value {
+		args = append(args, val)
+	}
+
+	depthVal := 0
+	if c.Depth != nil {
+		depthVal = *c.Depth
+	}
+
+	tableAlias := h.parentsAlias()
+	if !isParents {
+		tableAlias = h.childrenAlias()
+	}
+	tableAlias += aliasSuffix
+
+	query := h.valueQuery(c.Value, depthVal, tableAlias, isParents)
+	f.addRecursiveWith(query, args...)
+
+	f.addLeftJoin(tableAlias, "", fmt.Sprintf("%s.item_id = %s.id", tableAlias, h.primaryTable))
+	addHierarchicalConditionClauses(f, c, tableAlias, "root_id")
+}
+
+func (h hierarchicalRelationshipHandler) handleValuesSimple(f *filterBuilder, value string, isParents bool) {
+	joinCol := h.childIDCol
+	valueCol := h.parentIDCol
+	if !isParents {
+		joinCol = h.parentIDCol
+		valueCol = h.childIDCol
+	}
+
+	tableAlias := h.parentsAlias()
+	if !isParents {
+		tableAlias = h.childrenAlias()
+	}
+
+	f.addInnerJoin(h.relationTable, tableAlias, fmt.Sprintf("%s.%s = %s.id", tableAlias, joinCol, h.primaryTable))
+	f.addWhere(fmt.Sprintf("%s.%s = ?", tableAlias, valueCol), value)
+}
+
+func (h hierarchicalRelationshipHandler) hierarchicalCriterionHandler(criterion *models.HierarchicalMultiCriterionInput, isParents bool) criterionHandlerFunc {
+	return func(ctx context.Context, f *filterBuilder) {
+		if criterion != nil {
+			c := criterion.CombineExcludes()
+
+			// validate the modifier
+			if err := h.validateModifier(c.Modifier); err != nil {
+				f.setError(err)
+				return
+			}
+
+			if c.Modifier == models.CriterionModifierIsNull || c.Modifier == models.CriterionModifierNotNull {
+				h.handleNullNotNull(f, c.Modifier, isParents)
+				return
+			}
+
+			if len(c.Value) == 0 && len(c.Excludes) == 0 {
+				return
+			}
+
+			depth := 0
+			if c.Depth != nil {
+				depth = *c.Depth
+			}
+
+			// if we have a single include, no excludes, and no depth, we can use a simple join and where clause
+			if (c.Modifier == models.CriterionModifierIncludes || c.Modifier == models.CriterionModifierIncludesAll) && len(c.Value) == 1 && len(c.Excludes) == 0 && depth == 0 {
+				h.handleValuesSimple(f, c.Value[0], isParents)
+				return
+			}
+
+			aliasSuffix := ""
+			h.handleValues(f, c, isParents, aliasSuffix)
+
+			if len(c.Excludes) > 0 {
+				exCriterion := models.HierarchicalMultiCriterionInput{
+					Value:    c.Excludes,
+					Depth:    c.Depth,
+					Modifier: models.CriterionModifierExcludes,
+				}
+
+				aliasSuffix := "2"
+				h.handleValues(f, exCriterion, isParents, aliasSuffix)
+			}
+		}
+	}
+}
+
+func (h hierarchicalRelationshipHandler) ParentsCriterionHandler(criterion *models.HierarchicalMultiCriterionInput) criterionHandlerFunc {
+	const isParents = true
+	return h.hierarchicalCriterionHandler(criterion, isParents)
+}
+
+func (h hierarchicalRelationshipHandler) ChildrenCriterionHandler(criterion *models.HierarchicalMultiCriterionInput) criterionHandlerFunc {
+	const isParents = false
+	return h.hierarchicalCriterionHandler(criterion, isParents)
+}
+
+func (h hierarchicalRelationshipHandler) countCriterionHandler(c *models.IntCriterionInput, isParents bool) criterionHandlerFunc {
+	tableAlias := h.parentsAlias()
+	col := h.childIDCol
+	otherCol := h.parentIDCol
+	if !isParents {
+		tableAlias = h.childrenAlias()
+		col = h.parentIDCol
+		otherCol = h.childIDCol
+	}
+	tableAlias += "_count"
+
+	return func(ctx context.Context, f *filterBuilder) {
+		if c != nil {
+			f.addLeftJoin(h.relationTable, tableAlias, fmt.Sprintf("%s.%s = %s.id", tableAlias, col, h.primaryTable))
+			clause, args := getIntCriterionWhereClause(fmt.Sprintf("count(distinct %s.%s)", tableAlias, otherCol), *c)
+
+			f.addHaving(clause, args...)
+		}
+	}
+}
+
+func (h hierarchicalRelationshipHandler) ParentCountCriterionHandler(parentCount *models.IntCriterionInput) criterionHandlerFunc {
+	const isParents = true
+	return h.countCriterionHandler(parentCount, isParents)
+}
+
+func (h hierarchicalRelationshipHandler) ChildCountCriterionHandler(childCount *models.IntCriterionInput) criterionHandlerFunc {
+	const isParents = false
+	return h.countCriterionHandler(childCount, isParents)
+}

pkg/sqlite/group.go

@@ -27,6 +27,8 @@ const (
 
 	groupURLsTable = "group_urls"
 	groupURLColumn = "url"
+
+	groupRelationsTable = "groups_relations"
 )
 
 type groupRow struct {
@@ -128,6 +130,7 @@ var (
 type GroupStore struct {
 	blobJoinQueryBuilder
 	tagRelationshipStore
+	groupRelationshipStore
 
 	tableMgr *table
 }
@@ -143,6 +146,9 @@ func NewGroupStore(blobStore *BlobStore) *GroupStore {
 				joinTable: groupsTagsTableMgr,
 			},
 		},
+		groupRelationshipStore: groupRelationshipStore{
+			table: groupRelationshipTableMgr,
+		},
 
 		tableMgr: groupTableMgr,
 	}
@@ -176,6 +182,14 @@ func (qb *GroupStore) Create(ctx context.Context, newObject *models.Group) error
 		return err
 	}
 
+	if err := qb.groupRelationshipStore.createContainingRelationships(ctx, id, newObject.ContainingGroups); err != nil {
+		return err
+	}
+
+	if err := qb.groupRelationshipStore.createSubRelationships(ctx, id, newObject.SubGroups); err != nil {
+		return err
+	}
+
 	updated, err := qb.find(ctx, id)
 	if err != nil {
 		return fmt.Errorf("finding after create: %w", err)
@@ -211,6 +225,14 @@ func (qb *GroupStore) UpdatePartial(ctx context.Context, id int, partial models.
 		return nil, err
 	}
 
+	if err := qb.groupRelationshipStore.modifyContainingRelationships(ctx, id, partial.ContainingGroups); err != nil {
+		return nil, err
+	}
+
+	if err := qb.groupRelationshipStore.modifySubRelationships(ctx, id, partial.SubGroups); err != nil {
+		return nil, err
+	}
+
 	return qb.find(ctx, id)
 }
 
@@ -232,6 +254,14 @@ func (qb *GroupStore) Update(ctx context.Context, updatedObject *models.Group) e
 		return err
 	}
 
+	if err := qb.groupRelationshipStore.replaceContainingRelationships(ctx, updatedObject.ID, updatedObject.ContainingGroups); err != nil {
+		return err
+	}
+
+	if err := qb.groupRelationshipStore.replaceSubRelationships(ctx, updatedObject.ID, updatedObject.SubGroups); err != nil {
+		return err
+	}
+
 	return nil
 }
 
@@ -412,9 +442,7 @@ func (qb *GroupStore) makeQuery(ctx context.Context, groupFilter *models.GroupFi
 		return nil, err
 	}
 
-	var err error
-	query.sortAndPagination, err = qb.getGroupSort(findFilter)
-	if err != nil {
+	if err := qb.setGroupSort(&query, findFilter); err != nil {
 		return nil, err
 	}
 
@@ -460,11 +488,12 @@ var groupSortOptions = sortOptions{
 	"random",
 	"rating",
 	"scenes_count",
+	"sub_group_order",
 	"tag_count",
 	"updated_at",
 }
 
-func (qb *GroupStore) getGroupSort(findFilter *models.FindFilterType) (string, error) {
+func (qb *GroupStore) setGroupSort(query *queryBuilder, findFilter *models.FindFilterType) error {
 	var sort string
 	var direction string
 	if findFilter == nil {
@@ -477,22 +506,31 @@ func (qb *GroupStore) getGroupSort(findFilter *models.FindFilterType) (string, e
 
 	// CVE-2024-32231 - ensure sort is in the list of allowed sorts
 	if err := groupSortOptions.validateSort(sort); err != nil {
-		return "", err
+		return err
 	}
 
-	sortQuery := ""
 	switch sort {
+	case "sub_group_order":
+		// sub_group_order is a special sort that sorts by the order_index of the subgroups
+		if query.hasJoin("groups_parents") {
+			query.sortAndPagination += getSort("order_index", direction, "groups_parents")
+		} else {
+			// this will give unexpected results if the query is not filtered by a parent group and
+			// the group has multiple parents and order indexes
+			query.join(groupRelationsTable, "", "groups.id = groups_relations.sub_id")
+			query.sortAndPagination += getSort("order_index", direction, groupRelationsTable)
+		}
 	case "tag_count":
-		sortQuery += getCountSort(groupTable, groupsTagsTable, groupIDColumn, direction)
+		query.sortAndPagination += getCountSort(groupTable, groupsTagsTable, groupIDColumn, direction)
 	case "scenes_count": // generic getSort won't work for this
-		sortQuery += getCountSort(groupTable, groupsScenesTable, groupIDColumn, direction)
+		query.sortAndPagination += getCountSort(groupTable, groupsScenesTable, groupIDColumn, direction)
 	default:
-		sortQuery += getSort(sort, direction, "groups")
+		query.sortAndPagination += getSort(sort, direction, "groups")
 	}
 
 	// Whatever the sorting, always use name/id as a final sort
-	sortQuery += ", COALESCE(groups.name, groups.id) COLLATE NATURAL_CI ASC"
-	return sortQuery, nil
+	query.sortAndPagination += ", COALESCE(groups.name, groups.id) COLLATE NATURAL_CI ASC"
+	return nil
 }
 
 func (qb *GroupStore) queryGroups(ctx context.Context, query string, args []interface{}) ([]*models.Group, error) {
@@ -592,3 +630,74 @@ WHERE groups.studio_id = ?
 func (qb *GroupStore) GetURLs(ctx context.Context, groupID int) ([]string, error) {
 	return groupsURLsTableMgr.get(ctx, groupID)
 }
+
+// FindSubGroupIDs returns a list of group IDs where a group in the ids list is a sub-group of the parent group
+func (qb *GroupStore) FindSubGroupIDs(ctx context.Context, containingID int, ids []int) ([]int, error) {
+	/*
+		SELECT gr.sub_id FROM groups_relations gr
+		WHERE gr.containing_id = :parentID AND gr.sub_id IN (:ids);
+	*/
+	table := groupRelationshipTableMgr.table
+	q := dialect.From(table).Prepared(true).
+		Select(table.Col("sub_id")).Where(
+		table.Col("containing_id").Eq(containingID),
+		table.Col("sub_id").In(ids),
+	)
+
+	const single = false
+	var ret []int
+	if err := queryFunc(ctx, q, single, func(r *sqlx.Rows) error {
+		var id int
+		if err := r.Scan(&id); err != nil {
+			return err
+		}
+
+		ret = append(ret, id)
+		return nil
+	}); err != nil {
+		return nil, err
+	}
+
+	return ret, nil
+}
+
+// FindInAscestors returns a list of group IDs where a group in the ids list is an ascestor of the ancestor group IDs
+func (qb *GroupStore) FindInAncestors(ctx context.Context, ascestorIDs []int, ids []int) ([]int, error) {
+	/*
+		WITH RECURSIVE ascestors AS (
+		 SELECT g.id AS parent_id FROM groups g WHERE g.id IN (:ascestorIDs)
+		 UNION
+		 SELECT gr.containing_id FROM groups_relations gr INNER JOIN ascestors a ON a.parent_id = gr.sub_id
+		)
+		SELECT p.parent_id FROM ascestors p WHERE p.parent_id IN (:ids);
+	*/
+	table := qb.table()
+	const ascestors = "ancestors"
+	const parentID = "parent_id"
+	q := dialect.From(ascestors).Prepared(true).
+		WithRecursive(ascestors,
+			dialect.From(qb.table()).Select(table.Col(idColumn).As(parentID)).
+				Where(table.Col(idColumn).In(ascestorIDs)).
+				Union(
+					dialect.From(groupRelationsJoinTable).InnerJoin(
+						goqu.I(ascestors), goqu.On(goqu.I("parent_id").Eq(goqu.I("sub_id"))),
+					).Select("containing_id"),
+				),
+		).Select(parentID).Where(goqu.I(parentID).In(ids))
+
+	const single = false
+	var ret []int
+	if err := queryFunc(ctx, q, single, func(r *sqlx.Rows) error {
+		var id int
+		if err := r.Scan(&id); err != nil {
+			return err
+		}
+
+		ret = append(ret, id)
+		return nil
+	}); err != nil {
+		return nil, err
+	}
+
+	return ret, nil
+}

pkg/sqlite/group_filter.go

@@ -51,6 +51,14 @@ func (qb *groupFilterHandler) handle(ctx context.Context, f *filterBuilder) {
 	f.handleCriterion(ctx, qb.criterionHandler())
 }
 
+var groupHierarchyHandler = hierarchicalRelationshipHandler{
+	primaryTable:  groupTable,
+	relationTable: groupRelationsTable,
+	aliasPrefix:   groupTable,
+	parentIDCol:   "containing_id",
+	childIDCol:    "sub_id",
+}
+
 func (qb *groupFilterHandler) criterionHandler() criterionHandler {
 	groupFilter := qb.groupFilter
 	return compoundHandler{
@@ -66,6 +74,10 @@ func (qb *groupFilterHandler) criterionHandler() criterionHandler {
 		qb.tagsCriterionHandler(groupFilter.Tags),
 		qb.tagCountCriterionHandler(groupFilter.TagCount),
 		&dateCriterionHandler{groupFilter.Date, "groups.date", nil},
+		groupHierarchyHandler.ParentsCriterionHandler(groupFilter.ContainingGroups),
+		groupHierarchyHandler.ChildrenCriterionHandler(groupFilter.SubGroups),
+		groupHierarchyHandler.ParentCountCriterionHandler(groupFilter.ContainingGroupCount),
+		groupHierarchyHandler.ChildCountCriterionHandler(groupFilter.SubGroupCount),
 		&timestampCriterionHandler{groupFilter.CreatedAt, "groups.created_at", nil},
 		&timestampCriterionHandler{groupFilter.UpdatedAt, "groups.updated_at", nil},
 

pkg/sqlite/group_relationships.go

@@ -0,0 +1,457 @@
+package sqlite
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/doug-martin/goqu/v9"
+	"github.com/doug-martin/goqu/v9/exp"
+	"github.com/jmoiron/sqlx"
+	"github.com/stashapp/stash/pkg/models"
+	"gopkg.in/guregu/null.v4"
+	"gopkg.in/guregu/null.v4/zero"
+)
+
+type groupRelationshipRow struct {
+	ContainingID int         `db:"containing_id"`
+	SubID        int         `db:"sub_id"`
+	OrderIndex   int         `db:"order_index"`
+	Description  zero.String `db:"description"`
+}
+
+func (r groupRelationshipRow) resolve(useContainingID bool) models.GroupIDDescription {
+	id := r.ContainingID
+	if !useContainingID {
+		id = r.SubID
+	}
+
+	return models.GroupIDDescription{
+		GroupID:     id,
+		Description: r.Description.String,
+	}
+}
+
+type groupRelationshipStore struct {
+	table *table
+}
+
+func (s *groupRelationshipStore) GetContainingGroupDescriptions(ctx context.Context, id int) ([]models.GroupIDDescription, error) {
+	const idIsContaining = false
+	return s.getGroupRelationships(ctx, id, idIsContaining)
+}
+
+func (s *groupRelationshipStore) GetSubGroupDescriptions(ctx context.Context, id int) ([]models.GroupIDDescription, error) {
+	const idIsContaining = true
+	return s.getGroupRelationships(ctx, id, idIsContaining)
+}
+
+func (s *groupRelationshipStore) getGroupRelationships(ctx context.Context, id int, idIsContaining bool) ([]models.GroupIDDescription, error) {
+	col := "containing_id"
+	if !idIsContaining {
+		col = "sub_id"
+	}
+
+	table := s.table.table
+	q := dialect.Select(table.All()).
+		From(table).
+		Where(table.Col(col).Eq(id)).
+		Order(table.Col("order_index").Asc())
+
+	const single = false
+	var ret []models.GroupIDDescription
+	if err := queryFunc(ctx, q, single, func(rows *sqlx.Rows) error {
+		var row groupRelationshipRow
+		if err := rows.StructScan(&row); err != nil {
+			return err
+		}
+
+		ret = append(ret, row.resolve(!idIsContaining))
+
+		return nil
+	}); err != nil {
+		return nil, fmt.Errorf("getting group relationships from %s: %w", table.GetTable(), err)
+	}
+
+	return ret, nil
+}
+
+// getMaxOrderIndex gets the maximum order index for the containing group with the given id
+func (s *groupRelationshipStore) getMaxOrderIndex(ctx context.Context, containingID int) (int, error) {
+	idColumn := s.table.table.Col("containing_id")
+
+	q := dialect.Select(goqu.MAX("order_index")).
+		From(s.table.table).
+		Where(idColumn.Eq(containingID))
+
+	var maxOrderIndex zero.Int
+	if err := querySimple(ctx, q, &maxOrderIndex); err != nil {
+		return 0, fmt.Errorf("getting max order index: %w", err)
+	}
+
+	return int(maxOrderIndex.Int64), nil
+}
+
+// createRelationships creates relationships between a group and other groups.
+// If idIsContaining is true, the provided id is the containing group.
+func (s *groupRelationshipStore) createRelationships(ctx context.Context, id int, d models.RelatedGroupDescriptions, idIsContaining bool) error {
+	if d.Loaded() {
+		for i, v := range d.List() {
+			orderIndex := i + 1
+
+			r := groupRelationshipRow{
+				ContainingID: id,
+				SubID:        v.GroupID,
+				OrderIndex:   orderIndex,
+				Description:  zero.StringFrom(v.Description),
+			}
+
+			if !idIsContaining {
+				// get the max order index of the containing groups sub groups
+				containingID := v.GroupID
+				maxOrderIndex, err := s.getMaxOrderIndex(ctx, containingID)
+				if err != nil {
+					return err
+				}
+
+				r.ContainingID = v.GroupID
+				r.SubID = id
+				r.OrderIndex = maxOrderIndex + 1
+			}
+
+			_, err := s.table.insert(ctx, r)
+			if err != nil {
+				return fmt.Errorf("inserting into %s: %w", s.table.table.GetTable(), err)
+			}
+		}
+
+		return nil
+	}
+
+	return nil
+}
+
+// createRelationships creates relationships between a group and other groups.
+// If idIsContaining is true, the provided id is the containing group.
+func (s *groupRelationshipStore) createContainingRelationships(ctx context.Context, id int, d models.RelatedGroupDescriptions) error {
+	const idIsContaining = false
+	return s.createRelationships(ctx, id, d, idIsContaining)
+}
+
+// createRelationships creates relationships between a group and other groups.
+// If idIsContaining is true, the provided id is the containing group.
+func (s *groupRelationshipStore) createSubRelationships(ctx context.Context, id int, d models.RelatedGroupDescriptions) error {
+	const idIsContaining = true
+	return s.createRelationships(ctx, id, d, idIsContaining)
+}
+
+func (s *groupRelationshipStore) replaceRelationships(ctx context.Context, id int, d models.RelatedGroupDescriptions, idIsContaining bool) error {
+	// always destroy the existing relationships even if the new list is empty
+	if err := s.destroyAllJoins(ctx, id, idIsContaining); err != nil {
+		return err
+	}
+
+	return s.createRelationships(ctx, id, d, idIsContaining)
+}
+
+func (s *groupRelationshipStore) replaceContainingRelationships(ctx context.Context, id int, d models.RelatedGroupDescriptions) error {
+	const idIsContaining = false
+	return s.replaceRelationships(ctx, id, d, idIsContaining)
+}
+
+func (s *groupRelationshipStore) replaceSubRelationships(ctx context.Context, id int, d models.RelatedGroupDescriptions) error {
+	const idIsContaining = true
+	return s.replaceRelationships(ctx, id, d, idIsContaining)
+}
+
+func (s *groupRelationshipStore) modifyRelationships(ctx context.Context, id int, v *models.UpdateGroupDescriptions, idIsContaining bool) error {
+	if v == nil {
+		return nil
+	}
+
+	switch v.Mode {
+	case models.RelationshipUpdateModeSet:
+		return s.replaceJoins(ctx, id, *v, idIsContaining)
+	case models.RelationshipUpdateModeAdd:
+		return s.addJoins(ctx, id, v.Groups, idIsContaining)
+	case models.RelationshipUpdateModeRemove:
+		toRemove := make([]int, len(v.Groups))
+		for i, vv := range v.Groups {
+			toRemove[i] = vv.GroupID
+		}
+		return s.destroyJoins(ctx, id, toRemove, idIsContaining)
+	}
+
+	return nil
+}
+
+func (s *groupRelationshipStore) modifyContainingRelationships(ctx context.Context, id int, v *models.UpdateGroupDescriptions) error {
+	const idIsContaining = false
+	return s.modifyRelationships(ctx, id, v, idIsContaining)
+}
+
+func (s *groupRelationshipStore) modifySubRelationships(ctx context.Context, id int, v *models.UpdateGroupDescriptions) error {
+	const idIsContaining = true
+	return s.modifyRelationships(ctx, id, v, idIsContaining)
+}
+
+func (s *groupRelationshipStore) addJoins(ctx context.Context, id int, groups []models.GroupIDDescription, idIsContaining bool) error {
+	// if we're adding to a containing group, get the max order index first
+	var maxOrderIndex int
+	if idIsContaining {
+		var err error
+		maxOrderIndex, err = s.getMaxOrderIndex(ctx, id)
+		if err != nil {
+			return err
+		}
+	}
+
+	for i, vv := range groups {
+		r := groupRelationshipRow{
+			Description: zero.StringFrom(vv.Description),
+		}
+
+		if idIsContaining {
+			r.ContainingID = id
+			r.SubID = vv.GroupID
+			r.OrderIndex = maxOrderIndex + (i + 1)
+		} else {
+			// get the max order index of the containing groups sub groups
+			containingMaxOrderIndex, err := s.getMaxOrderIndex(ctx, vv.GroupID)
+			if err != nil {
+				return err
+			}
+
+			r.ContainingID = vv.GroupID
+			r.SubID = id
+			r.OrderIndex = containingMaxOrderIndex + 1
+		}
+
+		_, err := s.table.insert(ctx, r)
+		if err != nil {
+			return fmt.Errorf("inserting into %s: %w", s.table.table.GetTable(), err)
+		}
+	}
+
+	return nil
+}
+
+func (s *groupRelationshipStore) destroyAllJoins(ctx context.Context, id int, idIsContaining bool) error {
+	table := s.table.table
+	idColumn := table.Col("containing_id")
+	if !idIsContaining {
+		idColumn = table.Col("sub_id")
+	}
+
+	q := dialect.Delete(table).Where(idColumn.Eq(id))
+
+	if _, err := exec(ctx, q); err != nil {
+		return fmt.Errorf("destroying %s: %w", table.GetTable(), err)
+	}
+
+	return nil
+}
+
+func (s *groupRelationshipStore) replaceJoins(ctx context.Context, id int, v models.UpdateGroupDescriptions, idIsContaining bool) error {
+	if err := s.destroyAllJoins(ctx, id, idIsContaining); err != nil {
+		return err
+	}
+
+	// convert to RelatedGroupDescriptions
+	rgd := models.NewRelatedGroupDescriptions(v.Groups)
+	return s.createRelationships(ctx, id, rgd, idIsContaining)
+}
+
+func (s *groupRelationshipStore) destroyJoins(ctx context.Context, id int, toRemove []int, idIsContaining bool) error {
+	table := s.table.table
+	idColumn := table.Col("containing_id")
+	fkColumn := table.Col("sub_id")
+	if !idIsContaining {
+		idColumn = table.Col("sub_id")
+		fkColumn = table.Col("containing_id")
+	}
+
+	q := dialect.Delete(table).Where(idColumn.Eq(id), fkColumn.In(toRemove))
+
+	if _, err := exec(ctx, q); err != nil {
+		return fmt.Errorf("destroying %s: %w", table.GetTable(), err)
+	}
+
+	return nil
+}
+
+func (s *groupRelationshipStore) getOrderIndexOfSubGroup(ctx context.Context, containingGroupID int, subGroupID int) (int, error) {
+	table := s.table.table
+	q := dialect.Select("order_index").
+		From(table).
+		Where(
+			table.Col("containing_id").Eq(containingGroupID),
+			table.Col("sub_id").Eq(subGroupID),
+		)
+
+	var orderIndex null.Int
+	if err := querySimple(ctx, q, &orderIndex); err != nil {
+		return 0, fmt.Errorf("getting order index: %w", err)
+	}
+
+	if !orderIndex.Valid {
+		return 0, fmt.Errorf("sub-group %d not found in containing group %d", subGroupID, containingGroupID)
+	}
+
+	return int(orderIndex.Int64), nil
+}
+
+func (s *groupRelationshipStore) getGroupIDAtOrderIndex(ctx context.Context, containingGroupID int, orderIndex int) (*int, error) {
+	table := s.table.table
+	q := dialect.Select(table.Col("sub_id")).From(table).Where(
+		table.Col("containing_id").Eq(containingGroupID),
+		table.Col("order_index").Eq(orderIndex),
+	)
+
+	var ret null.Int
+	if err := querySimple(ctx, q, &ret); err != nil {
+		return nil, fmt.Errorf("getting sub id for order index: %w", err)
+	}
+
+	if !ret.Valid {
+		return nil, nil
+	}
+
+	intRet := int(ret.Int64)
+	return &intRet, nil
+}
+
+func (s *groupRelationshipStore) getOrderIndexAfterOrderIndex(ctx context.Context, containingGroupID int, orderIndex int) (int, error) {
+	table := s.table.table
+	q := dialect.Select(goqu.MIN("order_index")).From(table).Where(
+		table.Col("containing_id").Eq(containingGroupID),
+		table.Col("order_index").Gt(orderIndex),
+	)
+
+	var ret null.Int
+	if err := querySimple(ctx, q, &ret); err != nil {
+		return 0, fmt.Errorf("getting order index: %w", err)
+	}
+
+	if !ret.Valid {
+		return orderIndex + 1, nil
+	}
+
+	return int(ret.Int64), nil
+}
+
+// incrementOrderIndexes increments the order_index value of all sub-groups in the containing group at or after the given index
+func (s *groupRelationshipStore) incrementOrderIndexes(ctx context.Context, groupID int, indexBefore int) error {
+	table := s.table.table
+
+	// WORKAROUND - sqlite won't allow incrementing the value directly since it causes a
+	// unique constraint violation.
+	// Instead, we first set the order index to a negative value temporarily
+	// see https://stackoverflow.com/a/7703239/695786
+	q := dialect.Update(table).Set(exp.Record{
+		"order_index": goqu.L("-order_index"),
+	}).Where(
+		table.Col("containing_id").Eq(groupID),
+		table.Col("order_index").Gte(indexBefore),
+	)
+
+	if _, err := exec(ctx, q); err != nil {
+		return fmt.Errorf("updating %s: %w", table.GetTable(), err)
+	}
+
+	q = dialect.Update(table).Set(exp.Record{
+		"order_index": goqu.L("1-order_index"),
+	}).Where(
+		table.Col("containing_id").Eq(groupID),
+		table.Col("order_index").Lt(0),
+	)
+
+	if _, err := exec(ctx, q); err != nil {
+		return fmt.Errorf("updating %s: %w", table.GetTable(), err)
+	}
+
+	return nil
+}
+
+func (s *groupRelationshipStore) reorderSubGroup(ctx context.Context, groupID int, subGroupID int, insertPointID int, insertAfter bool) error {
+	insertPointIndex, err := s.getOrderIndexOfSubGroup(ctx, groupID, insertPointID)
+	if err != nil {
+		return err
+	}
+
+	// if we're setting before
+	if insertAfter {
+		insertPointIndex, err = s.getOrderIndexAfterOrderIndex(ctx, groupID, insertPointIndex)
+		if err != nil {
+			return err
+		}
+	}
+
+	// increment the order index of all sub-groups after and including the insertion point
+	if err := s.incrementOrderIndexes(ctx, groupID, int(insertPointIndex)); err != nil {
+		return err
+	}
+
+	// set the order index of the sub-group to the insertion point
+	table := s.table.table
+	q := dialect.Update(table).Set(exp.Record{
+		"order_index": insertPointIndex,
+	}).Where(
+		table.Col("containing_id").Eq(groupID),
+		table.Col("sub_id").Eq(subGroupID),
+	)
+
+	if _, err := exec(ctx, q); err != nil {
+		return fmt.Errorf("updating %s: %w", table.GetTable(), err)
+	}
+
+	return nil
+}
+
+func (s *groupRelationshipStore) AddSubGroups(ctx context.Context, groupID int, subGroups []models.GroupIDDescription, insertIndex *int) error {
+	const idIsContaining = true
+
+	if err := s.addJoins(ctx, groupID, subGroups, idIsContaining); err != nil {
+		return err
+	}
+
+	ids := make([]int, len(subGroups))
+	for i, v := range subGroups {
+		ids[i] = v.GroupID
+	}
+
+	if insertIndex != nil {
+		// get the id of the sub-group at the insert index
+		insertPointID, err := s.getGroupIDAtOrderIndex(ctx, groupID, *insertIndex)
+		if err != nil {
+			return err
+		}
+
+		if insertPointID == nil {
+			// if the insert index is out of bounds, just assume adding to the end
+			return nil
+		}
+
+		// reorder the sub-groups
+		const insertAfter = false
+		if err := s.ReorderSubGroups(ctx, groupID, ids, *insertPointID, insertAfter); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+func (s *groupRelationshipStore) RemoveSubGroups(ctx context.Context, groupID int, subGroupIDs []int) error {
+	const idIsContaining = true
+	return s.destroyJoins(ctx, groupID, subGroupIDs, idIsContaining)
+}
+
+func (s *groupRelationshipStore) ReorderSubGroups(ctx context.Context, groupID int, subGroupIDs []int, insertPointID int, insertAfter bool) error {
+	for _, id := range subGroupIDs {
+		if err := s.reorderSubGroup(ctx, groupID, id, insertPointID, insertAfter); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

pkg/sqlite/migrations/67_group_relationships.up.sql

@@ -0,0 +1,13 @@
+CREATE TABLE `groups_relations` (
+  `containing_id` integer not null,
+  `sub_id` integer not null,
+  `order_index` integer not null,
+  `description` varchar(255),
+  primary key (`containing_id`, `sub_id`),
+  foreign key (`containing_id`) references `groups`(`id`) on delete cascade,
+  foreign key (`sub_id`) references `groups`(`id`) on delete cascade,
+  check (`containing_id` != `sub_id`)
+);
+
+CREATE INDEX `index_groups_relations_sub_id` ON `groups_relations` (`sub_id`);
+CREATE UNIQUE INDEX `index_groups_relations_order_index_unique` ON `groups_relations` (`containing_id`, `order_index`);

pkg/sqlite/query.go

@@ -110,6 +110,16 @@ func (qb *queryBuilder) addArg(args ...interface{}) {
 	qb.args = append(qb.args, args...)
 }
 
+func (qb *queryBuilder) hasJoin(alias string) bool {
+	for _, j := range qb.joins {
+		if j.alias() == alias {
+			return true
+		}
+	}
+
+	return false
+}
+
 func (qb *queryBuilder) join(table, as, onClause string) {
 	newJoin := join{
 		table:    table,

pkg/sqlite/scene.go

@@ -791,13 +791,6 @@ func (qb *SceneStore) FindByGroupID(ctx context.Context, groupID int) ([]*models
 	return ret, nil
 }
 
-func (qb *SceneStore) CountByGroupID(ctx context.Context, groupID int) (int, error) {
-	joinTable := scenesGroupsJoinTable
-
-	q := dialect.Select(goqu.COUNT("*")).From(joinTable).Where(joinTable.Col(groupIDColumn).Eq(groupID))
-	return count(ctx, q)
-}
-
 func (qb *SceneStore) Count(ctx context.Context) (int, error) {
 	q := dialect.Select(goqu.COUNT("*")).From(qb.table())
 	return count(ctx, q)
@@ -858,6 +851,7 @@ func (qb *SceneStore) PlayDuration(ctx context.Context) (float64, error) {
 	return ret, nil
 }
 
+// TODO - currently only used by unit test
 func (qb *SceneStore) CountByStudioID(ctx context.Context, studioID int) (int, error) {
 	table := qb.table()
 
@@ -865,13 +859,6 @@ func (qb *SceneStore) CountByStudioID(ctx context.Context, studioID int) (int, e
 	return count(ctx, q)
 }
 
-func (qb *SceneStore) CountByTagID(ctx context.Context, tagID int) (int, error) {
-	joinTable := scenesTagsJoinTable
-
-	q := dialect.Select(goqu.COUNT("*")).From(joinTable).Where(joinTable.Col(tagIDColumn).Eq(tagID))
-	return count(ctx, q)
-}
-
 func (qb *SceneStore) countMissingFingerprints(ctx context.Context, fpType string) (int, error) {
 	fpTable := fingerprintTableMgr.table.As("fingerprints_temp")
 

pkg/sqlite/scene_filter.go

@@ -149,7 +149,7 @@ func (qb *sceneFilterHandler) criterionHandler() criterionHandler {
 		studioCriterionHandler(sceneTable, sceneFilter.Studios),
 
 		qb.groupsCriterionHandler(sceneFilter.Groups),
-		qb.groupsCriterionHandler(sceneFilter.Movies),
+		qb.moviesCriterionHandler(sceneFilter.Movies),
 
 		qb.galleriesCriterionHandler(sceneFilter.Galleries),
 		qb.performerTagsCriterionHandler(sceneFilter.PerformerTags),
@@ -483,7 +483,8 @@ func (qb *sceneFilterHandler) performerAgeCriterionHandler(performerAge *models.
 	}
 }
 
-func (qb *sceneFilterHandler) groupsCriterionHandler(movies *models.MultiCriterionInput) criterionHandlerFunc {
+// legacy handler
+func (qb *sceneFilterHandler) moviesCriterionHandler(movies *models.MultiCriterionInput) criterionHandlerFunc {
 	addJoinsFunc := func(f *filterBuilder) {
 		sceneRepository.groups.join(f, "", "scenes.id")
 		f.addLeftJoin("groups", "", "groups_scenes.group_id = groups.id")
@@ -492,6 +493,23 @@ func (qb *sceneFilterHandler) groupsCriterionHandler(movies *models.MultiCriteri
 	return h.handler(movies)
 }
 
+func (qb *sceneFilterHandler) groupsCriterionHandler(groups *models.HierarchicalMultiCriterionInput) criterionHandlerFunc {
+	h := joinedHierarchicalMultiCriterionHandlerBuilder{
+		primaryTable: sceneTable,
+		foreignTable: groupTable,
+		foreignFK:    "group_id",
+
+		relationsTable: groupRelationsTable,
+		parentFK:       "containing_id",
+		childFK:        "sub_id",
+		joinAs:         "scene_group",
+		joinTable:      groupsScenesTable,
+		primaryFK:      sceneIDColumn,
+	}
+
+	return h.handler(groups)
+}
+
 func (qb *sceneFilterHandler) galleriesCriterionHandler(galleries *models.MultiCriterionInput) criterionHandlerFunc {
 	addJoinsFunc := func(f *filterBuilder) {
 		sceneRepository.galleries.join(f, "", "scenes.id")

pkg/sqlite/scene_test.go

@@ -16,6 +16,7 @@ import (
 
 	"github.com/stashapp/stash/pkg/models"
 	"github.com/stashapp/stash/pkg/sliceutil"
+	"github.com/stashapp/stash/pkg/sliceutil/intslice"
 	"github.com/stretchr/testify/assert"
 )
 
@@ -2217,7 +2218,7 @@ func TestSceneQuery(t *testing.T) {
 				},
 			})
 			if (err != nil) != tt.wantErr {
-				t.Errorf("PerformerStore.Query() error = %v, wantErr %v", err, tt.wantErr)
+				t.Errorf("SceneStore.Query() error = %v, wantErr %v", err, tt.wantErr)
 				return
 			}
 
@@ -3873,6 +3874,100 @@ func TestSceneQueryStudioDepth(t *testing.T) {
 	})
 }
 
+func TestSceneGroups(t *testing.T) {
+	type criterion struct {
+		valueIdxs []int
+		modifier  models.CriterionModifier
+		depth     int
+	}
+
+	tests := []struct {
+		name        string
+		c           criterion
+		q           string
+		includeIdxs []int
+		excludeIdxs []int
+	}{
+		{
+			"includes",
+			criterion{
+				[]int{groupIdxWithScene},
+				models.CriterionModifierIncludes,
+				0,
+			},
+			"",
+			[]int{sceneIdxWithGroup},
+			nil,
+		},
+		{
+			"excludes",
+			criterion{
+				[]int{groupIdxWithScene},
+				models.CriterionModifierExcludes,
+				0,
+			},
+			getSceneStringValue(sceneIdxWithGroup, titleField),
+			nil,
+			[]int{sceneIdxWithGroup},
+		},
+		{
+			"includes (depth = 1)",
+			criterion{
+				[]int{groupIdxWithChildWithScene},
+				models.CriterionModifierIncludes,
+				1,
+			},
+			"",
+			[]int{sceneIdxWithGroupWithParent},
+			nil,
+		},
+	}
+
+	for _, tt := range tests {
+		valueIDs := indexesToIDs(groupIDs, tt.c.valueIdxs)
+
+		runWithRollbackTxn(t, tt.name, func(t *testing.T, ctx context.Context) {
+			assert := assert.New(t)
+
+			sceneFilter := &models.SceneFilterType{
+				Groups: &models.HierarchicalMultiCriterionInput{
+					Value:    intslice.IntSliceToStringSlice(valueIDs),
+					Modifier: tt.c.modifier,
+				},
+			}
+
+			if tt.c.depth != 0 {
+				sceneFilter.Groups.Depth = &tt.c.depth
+			}
+
+			findFilter := &models.FindFilterType{}
+			if tt.q != "" {
+				findFilter.Q = &tt.q
+			}
+
+			results, err := db.Scene.Query(ctx, models.SceneQueryOptions{
+				SceneFilter: sceneFilter,
+				QueryOptions: models.QueryOptions{
+					FindFilter: findFilter,
+				},
+			})
+			if err != nil {
+				t.Errorf("SceneStore.Query() error = %v", err)
+				return
+			}
+
+			include := indexesToIDs(sceneIDs, tt.includeIdxs)
+			exclude := indexesToIDs(sceneIDs, tt.excludeIdxs)
+
+			assert.Subset(results.IDs, include)
+
+			for _, e := range exclude {
+				assert.NotContains(results.IDs, e)
+			}
+		})
+	}
+}
+
 func TestSceneQueryMovies(t *testing.T) {
 	withTxn(func(ctx context.Context) error {
 		sqb := db.Scene
@@ -4188,78 +4283,6 @@ func verifyScenesPerformerCount(t *testing.T, performerCountCriterion models.Int
 	})
 }
 
-func TestSceneCountByTagID(t *testing.T) {
-	withTxn(func(ctx context.Context) error {
-		sqb := db.Scene
-
-		sceneCount, err := sqb.CountByTagID(ctx, tagIDs[tagIdxWithScene])
-
-		if err != nil {
-			t.Errorf("error calling CountByTagID: %s", err.Error())
-		}
-
-		assert.Equal(t, 1, sceneCount)
-
-		sceneCount, err = sqb.CountByTagID(ctx, 0)
-
-		if err != nil {
-			t.Errorf("error calling CountByTagID: %s", err.Error())
-		}
-
-		assert.Equal(t, 0, sceneCount)
-
-		return nil
-	})
-}
-
-func TestSceneCountByGroupID(t *testing.T) {
-	withTxn(func(ctx context.Context) error {
-		sqb := db.Scene
-
-		sceneCount, err := sqb.CountByGroupID(ctx, groupIDs[groupIdxWithScene])
-
-		if err != nil {
-			t.Errorf("error calling CountByGroupID: %s", err.Error())
-		}
-
-		assert.Equal(t, 1, sceneCount)
-
-		sceneCount, err = sqb.CountByGroupID(ctx, 0)
-
-		if err != nil {
-			t.Errorf("error calling CountByGroupID: %s", err.Error())
-		}
-
-		assert.Equal(t, 0, sceneCount)
-
-		return nil
-	})
-}
-
-func TestSceneCountByStudioID(t *testing.T) {
-	withTxn(func(ctx context.Context) error {
-		sqb := db.Scene
-
-		sceneCount, err := sqb.CountByStudioID(ctx, studioIDs[studioIdxWithScene])
-
-		if err != nil {
-			t.Errorf("error calling CountByStudioID: %s", err.Error())
-		}
-
-		assert.Equal(t, 1, sceneCount)
-
-		sceneCount, err = sqb.CountByStudioID(ctx, 0)
-
-		if err != nil {
-			t.Errorf("error calling CountByStudioID: %s", err.Error())
-		}
-
-		assert.Equal(t, 0, sceneCount)
-
-		return nil
-	})
-}
-
 func TestFindByMovieID(t *testing.T) {
 	withTxn(func(ctx context.Context) error {
 		sqb := db.Scene

pkg/sqlite/setup_test.go

@@ -78,6 +78,7 @@ const (
 	sceneIdxWithGrandChildStudio
 	sceneIdxMissingPhash
 	sceneIdxWithPerformerParentTag
+	sceneIdxWithGroupWithParent
 	// new indexes above
 	lastSceneIdx
 
@@ -153,9 +154,15 @@ const (
 	groupIdxWithTag
 	groupIdxWithTwoTags
 	groupIdxWithThreeTags
+	groupIdxWithGrandChild
+	groupIdxWithChild
+	groupIdxWithParentAndChild
+	groupIdxWithParent
+	groupIdxWithGrandParent
+	groupIdxWithParentAndScene
+	groupIdxWithChildWithScene
 	// groups with dup names start from the end
-	// create 7 more basic groups (can remove this if we add more indexes)
-	groupIdxWithDupName = groupIdxWithStudio + 7
+	groupIdxWithDupName
 
 	groupsNameCase   = groupIdxWithDupName
 	groupsNameNoCase = 1
@@ -391,6 +398,7 @@ var (
 
 	sceneGroups = linkMap{
 		sceneIdxWithGroup:           {groupIdxWithScene},
+		sceneIdxWithGroupWithParent: {groupIdxWithParentAndScene},
 	}
 
 	sceneStudios = map[int]int{
@@ -541,15 +549,31 @@ var (
 	}
 )
 
+var (
+	groupParentLinks = [][2]int{
+		{groupIdxWithChild, groupIdxWithParent},
+		{groupIdxWithGrandChild, groupIdxWithParentAndChild},
+		{groupIdxWithParentAndChild, groupIdxWithGrandParent},
+		{groupIdxWithChildWithScene, groupIdxWithParentAndScene},
+	}
+)
+
 func indexesToIDs(ids []int, indexes []int) []int {
 	ret := make([]int, len(indexes))
 	for i, idx := range indexes {
-		ret[i] = ids[idx]
+		ret[i] = indexToID(ids, idx)
 	}
 
 	return ret
 }
 
+func indexToID(ids []int, idx int) int {
+	if idx < 0 {
+		return invalidID
+	}
+	return ids[idx]
+}
+
 func indexFromID(ids []int, id int) int {
 	for i, v := range ids {
 		if v == id {
@@ -697,6 +721,10 @@ func populateDB() error {
 			return fmt.Errorf("error linking tags parent: %s", err.Error())
 		}
 
+		if err := linkGroupsParent(ctx, db.Group); err != nil {
+			return fmt.Errorf("error linking tags parent: %s", err.Error())
+		}
+
 		for _, ms := range markerSpecs {
 			if err := createMarker(ctx, db.SceneMarker, ms); err != nil {
 				return fmt.Errorf("error creating scene marker: %s", err.Error())
@@ -1885,6 +1913,24 @@ func linkTagsParent(ctx context.Context, qb models.TagReaderWriter) error {
 	})
 }
 
+func linkGroupsParent(ctx context.Context, qb models.GroupReaderWriter) error {
+	return doLinks(groupParentLinks, func(parentIndex, childIndex int) error {
+		groupID := groupIDs[childIndex]
+
+		p := models.GroupPartial{
+			ContainingGroups: &models.UpdateGroupDescriptions{
+				Groups: []models.GroupIDDescription{
+					{GroupID: groupIDs[parentIndex]},
+				},
+				Mode: models.RelationshipUpdateModeAdd,
+			},
+		}
+
+		_, err := qb.UpdatePartial(ctx, groupID, p)
+		return err
+	})
+}
+
 func addTagImage(ctx context.Context, qb models.TagWriter, tagIndex int) error {
 	return qb.UpdateImage(ctx, tagIDs[tagIndex], []byte("image"))
 }

pkg/sqlite/tables.go

@@ -39,6 +39,7 @@ var (
 
 	groupsURLsJoinTable     = goqu.T(groupURLsTable)
 	groupsTagsJoinTable     = goqu.T(groupsTagsTable)
+	groupRelationsJoinTable = goqu.T(groupRelationsTable)
 
 	tagsAliasesJoinTable  = goqu.T(tagAliasesTable)
 	tagRelationsJoinTable = goqu.T(tagRelationsTable)
@@ -361,6 +362,10 @@ var (
 		foreignTable: tagTableMgr,
 		orderBy:      tagTableMgr.table.Col("name").Asc(),
 	}
+
+	groupRelationshipTableMgr = &table{
+		table: groupRelationsJoinTable,
+	}
 )
 
 var (

pkg/sqlite/tag_filter.go

@@ -2,7 +2,6 @@ package sqlite
 
 import (
 	"context"
-	"fmt"
 
 	"github.com/stashapp/stash/pkg/models"
 )
@@ -51,6 +50,14 @@ func (qb *tagFilterHandler) handle(ctx context.Context, f *filterBuilder) {
 	f.handleCriterion(ctx, qb.criterionHandler())
 }
 
+var tagHierarchyHandler = hierarchicalRelationshipHandler{
+	primaryTable:  tagTable,
+	relationTable: tagRelationsTable,
+	aliasPrefix:   tagTable,
+	parentIDCol:   "parent_id",
+	childIDCol:    "child_id",
+}
+
 func (qb *tagFilterHandler) criterionHandler() criterionHandler {
 	tagFilter := qb.tagFilter
 	return compoundHandler{
@@ -72,10 +79,10 @@ func (qb *tagFilterHandler) criterionHandler() criterionHandler {
 		qb.groupCountCriterionHandler(tagFilter.MovieCount),
 
 		qb.markerCountCriterionHandler(tagFilter.MarkerCount),
-		qb.parentsCriterionHandler(tagFilter.Parents),
-		qb.childrenCriterionHandler(tagFilter.Children),
-		qb.parentCountCriterionHandler(tagFilter.ParentCount),
-		qb.childCountCriterionHandler(tagFilter.ChildCount),
+		tagHierarchyHandler.ParentsCriterionHandler(tagFilter.Parents),
+		tagHierarchyHandler.ChildrenCriterionHandler(tagFilter.Children),
+		tagHierarchyHandler.ParentCountCriterionHandler(tagFilter.ParentCount),
+		tagHierarchyHandler.ChildCountCriterionHandler(tagFilter.ChildCount),
 		&timestampCriterionHandler{tagFilter.CreatedAt, "tags.created_at", nil},
 		&timestampCriterionHandler{tagFilter.UpdatedAt, "tags.updated_at", nil},
 
@@ -212,213 +219,3 @@ func (qb *tagFilterHandler) markerCountCriterionHandler(markerCount *models.IntC
 		}
 	}
 }
-
-func (qb *tagFilterHandler) parentsCriterionHandler(criterion *models.HierarchicalMultiCriterionInput) criterionHandlerFunc {
-	return func(ctx context.Context, f *filterBuilder) {
-		if criterion != nil {
-			tags := criterion.CombineExcludes()
-
-			// validate the modifier
-			switch tags.Modifier {
-			case models.CriterionModifierIncludesAll, models.CriterionModifierIncludes, models.CriterionModifierExcludes, models.CriterionModifierIsNull, models.CriterionModifierNotNull:
-				// valid
-			default:
-				f.setError(fmt.Errorf("invalid modifier %s for tag parent/children", criterion.Modifier))
-			}
-
-			if tags.Modifier == models.CriterionModifierIsNull || tags.Modifier == models.CriterionModifierNotNull {
-				var notClause string
-				if tags.Modifier == models.CriterionModifierNotNull {
-					notClause = "NOT"
-				}
-
-				f.addLeftJoin("tags_relations", "parent_relations", "tags.id = parent_relations.child_id")
-
-				f.addWhere(fmt.Sprintf("parent_relations.parent_id IS %s NULL", notClause))
-				return
-			}
-
-			if len(tags.Value) == 0 && len(tags.Excludes) == 0 {
-				return
-			}
-
-			if len(tags.Value) > 0 {
-				var args []interface{}
-				for _, val := range tags.Value {
-					args = append(args, val)
-				}
-
-				depthVal := 0
-				if tags.Depth != nil {
-					depthVal = *tags.Depth
-				}
-
-				var depthCondition string
-				if depthVal != -1 {
-					depthCondition = fmt.Sprintf("WHERE depth < %d", depthVal)
-				}
-
-				query := `parents AS (
-		SELECT parent_id AS root_id, child_id AS item_id, 0 AS depth FROM tags_relations WHERE parent_id IN` + getInBinding(len(tags.Value)) + `
-		UNION
-		SELECT root_id, child_id, depth + 1 FROM tags_relations INNER JOIN parents ON item_id = parent_id ` + depthCondition + `
-	)`
-
-				f.addRecursiveWith(query, args...)
-
-				f.addLeftJoin("parents", "", "parents.item_id = tags.id")
-
-				addHierarchicalConditionClauses(f, tags, "parents", "root_id")
-			}
-
-			if len(tags.Excludes) > 0 {
-				var args []interface{}
-				for _, val := range tags.Excludes {
-					args = append(args, val)
-				}
-
-				depthVal := 0
-				if tags.Depth != nil {
-					depthVal = *tags.Depth
-				}
-
-				var depthCondition string
-				if depthVal != -1 {
-					depthCondition = fmt.Sprintf("WHERE depth < %d", depthVal)
-				}
-
-				query := `parents2 AS (
-		SELECT parent_id AS root_id, child_id AS item_id, 0 AS depth FROM tags_relations WHERE parent_id IN` + getInBinding(len(tags.Excludes)) + `
-		UNION
-		SELECT root_id, child_id, depth + 1 FROM tags_relations INNER JOIN parents2 ON item_id = parent_id ` + depthCondition + `
-	)`
-
-				f.addRecursiveWith(query, args...)
-
-				f.addLeftJoin("parents2", "", "parents2.item_id = tags.id")
-
-				addHierarchicalConditionClauses(f, models.HierarchicalMultiCriterionInput{
-					Value:    tags.Excludes,
-					Depth:    tags.Depth,
-					Modifier: models.CriterionModifierExcludes,
-				}, "parents2", "root_id")
-			}
-		}
-	}
-}
-
-func (qb *tagFilterHandler) childrenCriterionHandler(criterion *models.HierarchicalMultiCriterionInput) criterionHandlerFunc {
-	return func(ctx context.Context, f *filterBuilder) {
-		if criterion != nil {
-			tags := criterion.CombineExcludes()
-
-			// validate the modifier
-			switch tags.Modifier {
-			case models.CriterionModifierIncludesAll, models.CriterionModifierIncludes, models.CriterionModifierExcludes, models.CriterionModifierIsNull, models.CriterionModifierNotNull:
-				// valid
-			default:
-				f.setError(fmt.Errorf("invalid modifier %s for tag parent/children", criterion.Modifier))
-			}
-
-			if tags.Modifier == models.CriterionModifierIsNull || tags.Modifier == models.CriterionModifierNotNull {
-				var notClause string
-				if tags.Modifier == models.CriterionModifierNotNull {
-					notClause = "NOT"
-				}
-
-				f.addLeftJoin("tags_relations", "child_relations", "tags.id = child_relations.parent_id")
-
-				f.addWhere(fmt.Sprintf("child_relations.child_id IS %s NULL", notClause))
-				return
-			}
-
-			if len(tags.Value) == 0 && len(tags.Excludes) == 0 {
-				return
-			}
-
-			if len(tags.Value) > 0 {
-				var args []interface{}
-				for _, val := range tags.Value {
-					args = append(args, val)
-				}
-
-				depthVal := 0
-				if tags.Depth != nil {
-					depthVal = *tags.Depth
-				}
-
-				var depthCondition string
-				if depthVal != -1 {
-					depthCondition = fmt.Sprintf("WHERE depth < %d", depthVal)
-				}
-
-				query := `children AS (
-		SELECT child_id AS root_id, parent_id AS item_id, 0 AS depth FROM tags_relations WHERE child_id IN` + getInBinding(len(tags.Value)) + `
-		UNION
-		SELECT root_id, parent_id, depth + 1 FROM tags_relations INNER JOIN children ON item_id = child_id ` + depthCondition + `
-	)`
-
-				f.addRecursiveWith(query, args...)
-
-				f.addLeftJoin("children", "", "children.item_id = tags.id")
-
-				addHierarchicalConditionClauses(f, tags, "children", "root_id")
-			}
-
-			if len(tags.Excludes) > 0 {
-				var args []interface{}
-				for _, val := range tags.Excludes {
-					args = append(args, val)
-				}
-
-				depthVal := 0
-				if tags.Depth != nil {
-					depthVal = *tags.Depth
-				}
-
-				var depthCondition string
-				if depthVal != -1 {
-					depthCondition = fmt.Sprintf("WHERE depth < %d", depthVal)
-				}
-
-				query := `children2 AS (
-		SELECT child_id AS root_id, parent_id AS item_id, 0 AS depth FROM tags_relations WHERE child_id IN` + getInBinding(len(tags.Excludes)) + `
-		UNION
-		SELECT root_id, parent_id, depth + 1 FROM tags_relations INNER JOIN children2 ON item_id = child_id ` + depthCondition + `
-	)`
-
-				f.addRecursiveWith(query, args...)
-
-				f.addLeftJoin("children2", "", "children2.item_id = tags.id")
-
-				addHierarchicalConditionClauses(f, models.HierarchicalMultiCriterionInput{
-					Value:    tags.Excludes,
-					Depth:    tags.Depth,
-					Modifier: models.CriterionModifierExcludes,
-				}, "children2", "root_id")
-			}
-		}
-	}
-}
-
-func (qb *tagFilterHandler) parentCountCriterionHandler(parentCount *models.IntCriterionInput) criterionHandlerFunc {
-	return func(ctx context.Context, f *filterBuilder) {
-		if parentCount != nil {
-			f.addLeftJoin("tags_relations", "parents_count", "parents_count.child_id = tags.id")
-			clause, args := getIntCriterionWhereClause("count(distinct parents_count.parent_id)", *parentCount)
-
-			f.addHaving(clause, args...)
-		}
-	}
-}
-
-func (qb *tagFilterHandler) childCountCriterionHandler(childCount *models.IntCriterionInput) criterionHandlerFunc {
-	return func(ctx context.Context, f *filterBuilder) {
-		if childCount != nil {
-			f.addLeftJoin("tags_relations", "children_count", "children_count.parent_id = tags.id")
-			clause, args := getIntCriterionWhereClause("count(distinct children_count.child_id)", *childCount)
-
-			f.addHaving(clause, args...)
-		}
-	}
-}

pkg/sqlite/tag_test.go

@@ -712,7 +712,7 @@ func TestTagQueryParent(t *testing.T) {
 		assert.Len(t, tags, 1)
 
 		// ensure id is correct
-		assert.Equal(t, sceneIDs[tagIdxWithParentTag], tags[0].ID)
+		assert.Equal(t, tagIDs[tagIdxWithParentTag], tags[0].ID)
 
 		tagCriterion.Modifier = models.CriterionModifierExcludes
 

ui/v2.5/graphql/data/group.graphql

@@ -15,11 +15,21 @@ fragment GroupData on Group {
     ...SlimTagData
   }
 
+  containing_groups {
+    group {
+      ...SlimGroupData
+    }
+    description
+  }
+
   synopsis
   urls
   front_image_path
   back_image_path
   scene_count
+  scene_count_all: scene_count(depth: -1)
+  sub_group_count
+  sub_group_count_all: sub_group_count(depth: -1)
 
   scenes {
     id

ui/v2.5/graphql/mutations/group.graphql

@@ -23,3 +23,15 @@ mutation GroupDestroy($id: ID!) {
 mutation GroupsDestroy($ids: [ID!]!) {
   groupsDestroy(ids: $ids)
 }
+
+mutation AddGroupSubGroups($input: GroupSubGroupAddInput!) {
+  addGroupSubGroups(input: $input)
+}
+
+mutation RemoveGroupSubGroups($input: GroupSubGroupRemoveInput!) {
+  removeGroupSubGroups(input: $input)
+}
+
+mutation ReorderSubGroups($input: ReorderSubGroupsInput!) {
+  reorderSubGroups(input: $input)
+}

ui/v2.5/src/components/Groups/ContainingGroupsMultiSet.tsx

@@ -0,0 +1,61 @@
+import React from "react";
+import * as GQL from "src/core/generated-graphql";
+import { MultiSetModeButtons } from "../Shared/MultiSet";
+import {
+  IRelatedGroupEntry,
+  RelatedGroupTable,
+} from "./GroupDetails/RelatedGroupTable";
+import { Group, GroupSelect } from "./GroupSelect";
+
+export const ContainingGroupsMultiSet: React.FC<{
+  existingValue?: IRelatedGroupEntry[];
+  value: IRelatedGroupEntry[];
+  mode: GQL.BulkUpdateIdMode;
+  disabled?: boolean;
+  onUpdate: (value: IRelatedGroupEntry[]) => void;
+  onSetMode: (mode: GQL.BulkUpdateIdMode) => void;
+}> = (props) => {
+  const { mode, onUpdate, existingValue } = props;
+
+  function onSetMode(m: GQL.BulkUpdateIdMode) {
+    if (m === mode) {
+      return;
+    }
+
+    // if going to Set, set the existing ids
+    if (m === GQL.BulkUpdateIdMode.Set && existingValue) {
+      onUpdate(existingValue);
+      // if going from Set, wipe the ids
+    } else if (
+      m !== GQL.BulkUpdateIdMode.Set &&
+      mode === GQL.BulkUpdateIdMode.Set
+    ) {
+      onUpdate([]);
+    }
+
+    props.onSetMode(m);
+  }
+
+  function onRemoveSet(items: Group[]) {
+    onUpdate(items.map((group) => ({ group })));
+  }
+
+  return (
+    <div className="multi-set">
+      <MultiSetModeButtons mode={mode} onSetMode={onSetMode} />
+      {mode !== GQL.BulkUpdateIdMode.Remove ? (
+        <RelatedGroupTable
+          value={props.value}
+          onUpdate={props.onUpdate}
+          disabled={props.disabled}
+        />
+      ) : (
+        <GroupSelect
+          onSelect={(items) => onRemoveSet(items)}
+          values={[]}
+          isDisabled={props.disabled}
+        />
+      )}
+    </div>
+  );
+};

ui/v2.5/src/components/Groups/EditGroupsDialog.tsx

@@ -9,6 +9,7 @@ import { useToast } from "src/hooks/Toast";
 import * as FormUtils from "src/utils/form";
 import { RatingSystem } from "../Shared/Rating/RatingSystem";
 import {
+  getAggregateIds,
   getAggregateInputIDs,
   getAggregateInputValue,
   getAggregateRating,
@@ -18,12 +19,54 @@ import {
 import { faPencilAlt } from "@fortawesome/free-solid-svg-icons";
 import { isEqual } from "lodash-es";
 import { MultiSet } from "../Shared/MultiSet";
+import { ContainingGroupsMultiSet } from "./ContainingGroupsMultiSet";
+import { IRelatedGroupEntry } from "./GroupDetails/RelatedGroupTable";
 
 interface IListOperationProps {
   selected: GQL.GroupDataFragment[];
   onClose: (applied: boolean) => void;
 }
 
+export function getAggregateContainingGroups(
+  state: Pick<GQL.GroupDataFragment, "containing_groups">[]
+) {
+  const sortedLists: IRelatedGroupEntry[][] = state.map((o) =>
+    o.containing_groups
+      .map((oo) => ({
+        group: oo.group,
+        description: oo.description,
+      }))
+      .sort((a, b) => a.group.id.localeCompare(b.group.id))
+  );
+
+  return getAggregateIds(sortedLists);
+}
+
+function getAggregateContainingGroupInput(
+  mode: GQL.BulkUpdateIdMode,
+  input: IRelatedGroupEntry[] | undefined,
+  aggregateValues: IRelatedGroupEntry[]
+): GQL.BulkUpdateGroupDescriptionsInput | undefined {
+  if (mode === GQL.BulkUpdateIdMode.Set && (!input || input.length === 0)) {
+    // and all scenes have the same ids,
+    if (aggregateValues.length > 0) {
+      // then unset, otherwise ignore
+      return { mode, groups: [] };
+    }
+  } else {
+    // if input non-empty, then we are setting them
+    return {
+      mode,
+      groups:
+        input?.map((e) => {
+          return { group_id: e.group.id, description: e.description };
+        }) || [],
+    };
+  }
+
+  return undefined;
+}
+
 export const EditGroupsDialog: React.FC<IListOperationProps> = (
   props: IListOperationProps
 ) => {
@@ -39,6 +82,12 @@ export const EditGroupsDialog: React.FC<IListOperationProps> = (
   const [tagIds, setTagIds] = useState<string[]>();
   const [existingTagIds, setExistingTagIds] = useState<string[]>();
 
+  const [containingGroupsMode, setGroupMode] =
+    React.useState<GQL.BulkUpdateIdMode>(GQL.BulkUpdateIdMode.Add);
+  const [containingGroups, setGroups] = useState<IRelatedGroupEntry[]>();
+  const [existingContainingGroups, setExistingContainingGroups] =
+    useState<IRelatedGroupEntry[]>();
+
   const [updateGroups] = useBulkGroupUpdate(getGroupInput());
 
   const [isUpdating, setIsUpdating] = useState(false);
@@ -47,17 +96,23 @@ export const EditGroupsDialog: React.FC<IListOperationProps> = (
     const aggregateRating = getAggregateRating(props.selected);
     const aggregateStudioId = getAggregateStudioId(props.selected);
     const aggregateTagIds = getAggregateTagIds(props.selected);
+    const aggregateGroups = getAggregateContainingGroups(props.selected);
 
     const groupInput: GQL.BulkGroupUpdateInput = {
       ids: props.selected.map((group) => group.id),
       director,
     };
 
-    // if rating is undefined
     groupInput.rating100 = getAggregateInputValue(rating100, aggregateRating);
     groupInput.studio_id = getAggregateInputValue(studioId, aggregateStudioId);
     groupInput.tag_ids = getAggregateInputIDs(tagMode, tagIds, aggregateTagIds);
 
+    groupInput.containing_groups = getAggregateContainingGroupInput(
+      containingGroupsMode,
+      containingGroups,
+      aggregateGroups
+    );
+
     return groupInput;
   }
 
@@ -85,17 +140,22 @@ export const EditGroupsDialog: React.FC<IListOperationProps> = (
     let updateRating: number | undefined;
     let updateStudioId: string | undefined;
     let updateTagIds: string[] = [];
+    let updateContainingGroupIds: IRelatedGroupEntry[] = [];
     let updateDirector: string | undefined;
     let first = true;
 
     state.forEach((group: GQL.GroupDataFragment) => {
       const groupTagIDs = (group.tags ?? []).map((p) => p.id).sort();
+      const groupContainingGroupIDs = (group.containing_groups ?? []).sort(
+        (a, b) => a.group.id.localeCompare(b.group.id)
+      );
 
       if (first) {
         first = false;
         updateRating = group.rating100 ?? undefined;
         updateStudioId = group.studio?.id ?? undefined;
         updateTagIds = groupTagIDs;
+        updateContainingGroupIds = groupContainingGroupIDs;
         updateDirector = group.director ?? undefined;
       } else {
         if (group.rating100 !== updateRating) {
@@ -110,12 +170,16 @@ export const EditGroupsDialog: React.FC<IListOperationProps> = (
         if (!isEqual(groupTagIDs, updateTagIds)) {
           updateTagIds = [];
         }
+        if (!isEqual(groupContainingGroupIDs, updateContainingGroupIds)) {
+          updateTagIds = [];
+        }
       }
     });
 
     setRating(updateRating);
     setStudioId(updateStudioId);
     setExistingTagIds(updateTagIds);
+    setExistingContainingGroups(updateContainingGroupIds);
     setDirector(updateDirector);
   }, [props.selected]);
 
@@ -166,6 +230,19 @@ export const EditGroupsDialog: React.FC<IListOperationProps> = (
               />
             </Col>
           </Form.Group>
+          <Form.Group controlId="containing-groups">
+            <Form.Label>
+              <FormattedMessage id="containing_groups" />
+            </Form.Label>
+            <ContainingGroupsMultiSet
+              disabled={isUpdating}
+              onUpdate={(v) => setGroups(v)}
+              onSetMode={(newMode) => setGroupMode(newMode)}
+              existingValue={existingContainingGroups ?? []}
+              value={containingGroups ?? []}
+              mode={containingGroupsMode}
+            />
+          </Form.Group>
           <Form.Group controlId="director">
             <Form.Label>
               <FormattedMessage id="director" />

ui/v2.5/src/components/Groups/GroupCard.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useState } from "react";
+import React, { useEffect, useMemo, useState } from "react";
 import { Button, ButtonGroup } from "react-bootstrap";
 import * as GQL from "src/core/generated-graphql";
 import { GridCard, calculateCardWidth } from "../Shared/GridCard/GridCard";
@@ -10,26 +10,66 @@ import { FormattedMessage } from "react-intl";
 import { RatingBanner } from "../Shared/RatingBanner";
 import { faPlayCircle, faTag } from "@fortawesome/free-solid-svg-icons";
 import ScreenUtils from "src/utils/screen";
+import { RelatedGroupPopoverButton } from "./RelatedGroupPopover";
+
+const Description: React.FC<{
+  sceneNumber?: number;
+  description?: string;
+}> = ({ sceneNumber, description }) => {
+  if (!sceneNumber && !description) return null;
+
+  return (
+    <>
+      <hr />
+      {sceneNumber !== undefined && (
+        <span className="group-scene-number">
+          <FormattedMessage id="scene" /> #{sceneNumber}
+        </span>
+      )}
+      {description !== undefined && (
+        <span className="group-containing-group-description">
+          {description}
+        </span>
+      )}
+    </>
+  );
+};
 
 interface IProps {
   group: GQL.GroupDataFragment;
   containerWidth?: number;
-  sceneIndex?: number;
+  sceneNumber?: number;
   selecting?: boolean;
   selected?: boolean;
   onSelectedChanged?: (selected: boolean, shiftKey: boolean) => void;
+  fromGroupId?: string;
+  onMove?: (srcIds: string[], targetId: string, after: boolean) => void;
 }
 
 export const GroupCard: React.FC<IProps> = ({
   group,
-  sceneIndex,
+  sceneNumber,
   containerWidth,
   selecting,
   selected,
   onSelectedChanged,
+  fromGroupId,
+  onMove,
 }) => {
   const [cardWidth, setCardWidth] = useState<number>();
 
+  const groupDescription = useMemo(() => {
+    if (!fromGroupId) {
+      return undefined;
+    }
+
+    const containingGroup = group.containing_groups.find(
+      (cg) => cg.group.id === fromGroupId
+    );
+
+    return containingGroup?.description ?? undefined;
+  }, [fromGroupId, group.containing_groups]);
+
   useEffect(() => {
     if (!containerWidth || ScreenUtils.isMobile()) return;
 
@@ -41,19 +81,6 @@ export const GroupCard: React.FC<IProps> = ({
     setCardWidth(fittedCardWidth);
   }, [containerWidth]);
 
-  function maybeRenderSceneNumber() {
-    if (!sceneIndex) return;
-
-    return (
-      <>
-        <hr />
-        <span className="group-scene-number">
-          <FormattedMessage id="scene" /> #{sceneIndex}
-        </span>
-      </>
-    );
-  }
-
   function maybeRenderScenesPopoverButton() {
     if (group.scenes.length === 0) return;
 
@@ -93,14 +120,28 @@ export const GroupCard: React.FC<IProps> = ({
   }
 
   function maybeRenderPopoverButtonGroup() {
-    if (sceneIndex || group.scenes.length > 0 || group.tags.length > 0) {
+    if (
+      sceneNumber ||
+      groupDescription ||
+      group.scenes.length > 0 ||
+      group.tags.length > 0 ||
+      group.containing_groups.length > 0 ||
+      group.sub_group_count > 0
+    ) {
       return (
         <>
-          {maybeRenderSceneNumber()}
+          <Description
+            sceneNumber={sceneNumber}
+            description={groupDescription}
+          />
           <hr />
           <ButtonGroup className="card-popovers">
             {maybeRenderScenesPopoverButton()}
             {maybeRenderTagPopoverButton()}
+            {(group.sub_group_count > 0 ||
+              group.containing_groups.length > 0) && (
+              <RelatedGroupPopoverButton group={group} />
+            )}
           </ButtonGroup>
         </>
       );
@@ -110,6 +151,8 @@ export const GroupCard: React.FC<IProps> = ({
   return (
     <GridCard
       className="group-card"
+      objectId={group.id}
+      onMove={onMove}
       url={`/groups/${group.id}`}
       width={cardWidth}
       title={group.name}

ui/v2.5/src/components/Groups/GroupCardGrid.tsx

@@ -7,12 +7,16 @@ interface IGroupCardGrid {
   groups: GQL.GroupDataFragment[];
   selectedIds: Set<string>;
   onSelectChange: (id: string, selected: boolean, shiftKey: boolean) => void;
+  fromGroupId?: string;
+  onMove?: (srcIds: string[], targetId: string, after: boolean) => void;
 }
 
 export const GroupCardGrid: React.FC<IGroupCardGrid> = ({
   groups,
   selectedIds,
   onSelectChange,
+  fromGroupId,
+  onMove,
 }) => {
   const [componentRef, { width }] = useContainerDimensions();
   return (
@@ -27,6 +31,8 @@ export const GroupCardGrid: React.FC<IGroupCardGrid> = ({
           onSelectedChanged={(selected: boolean, shiftKey: boolean) =>
             onSelectChange(p.id, selected, shiftKey)
           }
+          fromGroupId={fromGroupId}
+          onMove={onMove}
         />
       ))}
     </div>

ui/v2.5/src/components/Groups/GroupDetails/AddGroupsDialog.tsx

@@ -0,0 +1,121 @@
+import React, { useCallback, useMemo, useState } from "react";
+import { Form } from "react-bootstrap";
+import { useIntl } from "react-intl";
+import * as GQL from "src/core/generated-graphql";
+import { useToast } from "src/hooks/Toast";
+import { faPlus } from "@fortawesome/free-solid-svg-icons";
+import { RelatedGroupTable, IRelatedGroupEntry } from "./RelatedGroupTable";
+import { ModalComponent } from "src/components/Shared/Modal";
+import { useAddSubGroups } from "src/core/StashService";
+import { ListFilterModel } from "src/models/list-filter/filter";
+import {
+  ContainingGroupsCriterionOption,
+  GroupsCriterion,
+} from "src/models/list-filter/criteria/groups";
+
+interface IListOperationProps {
+  containingGroup: GQL.GroupDataFragment;
+  onClose: (applied: boolean) => void;
+}
+
+export const AddSubGroupsDialog: React.FC<IListOperationProps> = (
+  props: IListOperationProps
+) => {
+  const intl = useIntl();
+  const [isUpdating, setIsUpdating] = useState(false);
+
+  const addSubGroups = useAddSubGroups();
+
+  const Toast = useToast();
+
+  const [entries, setEntries] = useState<IRelatedGroupEntry[]>([]);
+
+  const excludeIDs = useMemo(
+    () => [
+      ...props.containingGroup.containing_groups.map((m) => m.group.id),
+      props.containingGroup.id,
+    ],
+    [props.containingGroup]
+  );
+
+  const filterHook = useCallback(
+    (f: ListFilterModel) => {
+      const groupValue = {
+        id: props.containingGroup.id,
+        label: props.containingGroup.name,
+      };
+
+      // filter out sub groups that are already in the containing group
+      const criterion = new GroupsCriterion(ContainingGroupsCriterionOption);
+      criterion.value = {
+        items: [groupValue],
+        depth: 1,
+        excluded: [],
+      };
+      criterion.modifier = GQL.CriterionModifier.Excludes;
+      f.criteria.push(criterion);
+
+      return f;
+    },
+    [props.containingGroup]
+  );
+
+  const onSave = async () => {
+    setIsUpdating(true);
+    try {
+      // add the sub groups
+      await addSubGroups(
+        props.containingGroup.id,
+        entries.map((m) => ({
+          group_id: m.group.id,
+          description: m.description,
+        }))
+      );
+
+      const imageCount = entries.length;
+      Toast.success(
+        intl.formatMessage(
+          { id: "toast.added_entity" },
+          {
+            count: imageCount,
+            singularEntity: intl.formatMessage({ id: "group" }),
+            pluralEntity: intl.formatMessage({ id: "groups" }),
+          }
+        )
+      );
+
+      props.onClose(true);
+    } catch (err) {
+      Toast.error(err);
+    } finally {
+      setIsUpdating(false);
+    }
+  };
+
+  return (
+    <ModalComponent
+      show
+      icon={faPlus}
+      header={intl.formatMessage({ id: "actions.add_sub_groups" })}
+      accept={{
+        onClick: onSave,
+        text: intl.formatMessage({ id: "actions.add" }),
+      }}
+      cancel={{
+        onClick: () => props.onClose(false),
+        text: intl.formatMessage({ id: "actions.cancel" }),
+        variant: "secondary",
+      }}
+      isRunning={isUpdating}
+    >
+      <Form>
+        <RelatedGroupTable
+          value={entries}
+          onUpdate={(input) => setEntries(input)}
+          excludeIDs={excludeIDs}
+          filterHook={filterHook}
+        />
+      </Form>
+    </ModalComponent>
+  );
+};

ui/v2.5/src/components/Groups/GroupDetails/Group.tsx

@@ -9,7 +9,7 @@ import {
   useGroupUpdate,
   useGroupDestroy,
 } from "src/core/StashService";
-import { useHistory, RouteComponentProps } from "react-router-dom";
+import { useHistory, RouteComponentProps, Redirect } from "react-router-dom";
 import { DetailsEditNavbar } from "src/components/Shared/DetailsEditNavbar";
 import { ErrorMessage } from "src/components/Shared/ErrorMessage";
 import { LoadingIndicator } from "src/components/Shared/LoadingIndicator";
@@ -35,16 +35,89 @@ import { ExpandCollapseButton } from "src/components/Shared/CollapseButton";
 import { AliasList } from "src/components/Shared/DetailsPage/AliasList";
 import { HeaderImage } from "src/components/Shared/DetailsPage/HeaderImage";
 import { LightboxLink } from "src/hooks/Lightbox/LightboxLink";
+import {
+  TabTitleCounter,
+  useTabKey,
+} from "src/components/Shared/DetailsPage/Tabs";
+import { Tab, Tabs } from "react-bootstrap";
+import { GroupSubGroupsPanel } from "./GroupSubGroupsPanel";
+
+const validTabs = ["default", "scenes", "subgroups"] as const;
+type TabKey = (typeof validTabs)[number];
+
+function isTabKey(tab: string): tab is TabKey {
+  return validTabs.includes(tab as TabKey);
+}
+
+const GroupTabs: React.FC<{
+  tabKey?: TabKey;
+  group: GQL.GroupDataFragment;
+  abbreviateCounter: boolean;
+}> = ({ tabKey, group, abbreviateCounter }) => {
+  const { scene_count: sceneCount, sub_group_count: groupCount } = group;
+
+  const populatedDefaultTab = useMemo(() => {
+    if (sceneCount == 0 && groupCount !== 0) {
+      return "subgroups";
+    }
+
+    return "scenes";
+  }, [sceneCount, groupCount]);
+
+  const { setTabKey } = useTabKey({
+    tabKey,
+    validTabs,
+    defaultTabKey: populatedDefaultTab,
+    baseURL: `/groups/${group.id}`,
+  });
+
+  return (
+    <Tabs
+      id="group-tabs"
+      mountOnEnter
+      unmountOnExit
+      activeKey={tabKey}
+      onSelect={setTabKey}
+    >
+      <Tab
+        eventKey="scenes"
+        title={
+          <TabTitleCounter
+            messageID="scenes"
+            count={sceneCount}
+            abbreviateCounter={abbreviateCounter}
+          />
+        }
+      >
+        <GroupScenesPanel active={tabKey === "scenes"} group={group} />
+      </Tab>
+      <Tab
+        eventKey="subgroups"
+        title={
+          <TabTitleCounter
+            messageID="sub_groups"
+            count={groupCount}
+            abbreviateCounter={abbreviateCounter}
+          />
+        }
+      >
+        <GroupSubGroupsPanel active={tabKey === "subgroups"} group={group} />
+      </Tab>
+    </Tabs>
+  );
+};
 
 interface IProps {
   group: GQL.GroupDataFragment;
+  tabKey?: TabKey;
 }
 
 interface IGroupParams {
   id: string;
+  tab?: string;
 }
 
-const GroupPage: React.FC<IProps> = ({ group }) => {
+const GroupPage: React.FC<IProps> = ({ group, tabKey }) => {
   const intl = useIntl();
   const history = useHistory();
   const Toast = useToast();
@@ -55,6 +128,7 @@ const GroupPage: React.FC<IProps> = ({ group }) => {
   const enableBackgroundImage = uiConfig?.enableMovieBackgroundImage ?? false;
   const compactExpandedDetails = uiConfig?.compactExpandedDetails ?? false;
   const showAllDetails = uiConfig?.showAllDetails ?? true;
+  const abbreviateCounter = uiConfig?.abbreviateCounters ?? false;
 
   const [collapsed, setCollapsed] = useState<boolean>(!showAllDetails);
   const loadStickyHeader = useLoadStickyHeader();
@@ -230,14 +304,6 @@ const GroupPage: React.FC<IProps> = ({ group }) => {
     }
   }
 
-  const renderTabs = () => <GroupScenesPanel active={true} group={group} />;
-
-  function maybeRenderTab() {
-    if (!isEditing) {
-      return renderTabs();
-    }
-  }
-
   if (updating || deleting) return <LoadingIndicator />;
 
   const headerClassName = cx("detail-header", {
@@ -335,7 +401,15 @@ const GroupPage: React.FC<IProps> = ({ group }) => {
 
       <div className="detail-body">
         <div className="group-body">
-          <div className="group-tabs">{maybeRenderTab()}</div>
+          <div className="group-tabs">
+            {!isEditing && (
+              <GroupTabs
+                group={group}
+                tabKey={tabKey}
+                abbreviateCounter={abbreviateCounter}
+              />
+            )}
+          </div>
         </div>
       </div>
       {renderDeleteAlert()}
@@ -344,19 +418,33 @@ const GroupPage: React.FC<IProps> = ({ group }) => {
 };
 
 const GroupLoader: React.FC<RouteComponentProps<IGroupParams>> = ({
+  location,
   match,
 }) => {
-  const { id } = match.params;
+  const { id, tab } = match.params;
   const { data, loading, error } = useFindGroup(id);
 
   useScrollToTopOnMount();
 
+  if (tab && !isTabKey(tab)) {
+    return (
+      <Redirect
+        to={{
+          ...location,
+          pathname: `/groups/${id}`,
+        }}
+      />
+    );
+  }
+
   if (loading) return <LoadingIndicator />;
   if (error) return <ErrorMessage error={error.message} />;
   if (!data?.findGroup)
     return <ErrorMessage error={`No group found with id ${id}.`} />;
 
-  return <GroupPage group={data.findGroup} />;
+  return (
+    <GroupPage group={data.findGroup} tabKey={tab as TabKey | undefined} />
+  );
 };
 
 export default GroupLoader;

ui/v2.5/src/components/Groups/GroupDetails/GroupDetailsPanel.tsx

@@ -5,7 +5,28 @@ import TextUtils from "src/utils/text";
 import { DetailItem } from "src/components/Shared/DetailItem";
 import { Link } from "react-router-dom";
 import { DirectorLink } from "src/components/Shared/Link";
-import { TagLink } from "src/components/Shared/TagLink";
+import { GroupLink, TagLink } from "src/components/Shared/TagLink";
+
+interface IGroupDescription {
+  group: GQL.SlimGroupDataFragment;
+  description?: string | null;
+}
+
+const GroupsList: React.FC<{ groups: IGroupDescription[] }> = ({ groups }) => {
+  if (!groups.length) {
+    return null;
+  }
+
+  return (
+    <ul className="groups-list">
+      {groups.map((entry) => (
+        <li key={entry.group.id}>
+          <GroupLink group={entry.group} linkType="details" />
+        </li>
+      ))}
+    </ul>
+  );
+};
 
 interface IGroupDetailsPanel {
   group: GQL.GroupDataFragment;
@@ -48,6 +69,13 @@ export const GroupDetailsPanel: React.FC<IGroupDetailsPanel> = ({
             value={renderTagsField()}
             fullWidth={fullWidth}
           />
+          {group.containing_groups.length > 0 && (
+            <DetailItem
+              id="containing_groups"
+              value={<GroupsList groups={group.containing_groups} />}
+              fullWidth={fullWidth}
+            />
+          )}
         </>
       );
     }

ui/v2.5/src/components/Groups/GroupDetails/GroupEditPanel.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect, useState } from "react";
+import React, { useEffect, useMemo, useState } from "react";
 import { FormattedMessage, useIntl } from "react-intl";
 import * as GQL from "src/core/generated-graphql";
 import * as yup from "yup";
@@ -26,6 +26,8 @@ import {
 } from "src/utils/yup";
 import { Studio, StudioSelect } from "src/components/Studios/StudioSelect";
 import { useTagsEdit } from "src/hooks/tagsEdit";
+import { Group } from "src/components/Groups/GroupSelect";
+import { RelatedGroupTable, IRelatedGroupEntry } from "./RelatedGroupTable";
 
 interface IGroupEditPanel {
   group: Partial<GQL.GroupDataFragment>;
@@ -60,6 +62,7 @@ export const GroupEditPanel: React.FC<IGroupEditPanel> = ({
   const [scrapedGroup, setScrapedGroup] = useState<GQL.ScrapedGroup>();
 
   const [studio, setStudio] = useState<Studio | null>(null);
+  const [containingGroups, setContainingGroups] = useState<Group[]>([]);
 
   const schema = yup.object({
     name: yup.string().required(),
@@ -68,6 +71,14 @@ export const GroupEditPanel: React.FC<IGroupEditPanel> = ({
     date: yupDateString(intl),
     studio_id: yup.string().required().nullable(),
     tag_ids: yup.array(yup.string().required()).defined(),
+    containing_groups: yup
+      .array(
+        yup.object({
+          group_id: yup.string().required(),
+          description: yup.string().nullable().ensure(),
+        })
+      )
+      .defined(),
     director: yup.string().ensure(),
     urls: yupUniqueStringList(intl),
     synopsis: yup.string().ensure(),
@@ -82,6 +93,9 @@ export const GroupEditPanel: React.FC<IGroupEditPanel> = ({
     date: group?.date ?? "",
     studio_id: group?.studio?.id ?? null,
     tag_ids: (group?.tags ?? []).map((t) => t.id),
+    containing_groups: (group?.containing_groups ?? []).map((m) => {
+      return { group_id: m.group.id, description: m.description ?? "" };
+    }),
     director: group?.director ?? "",
     urls: group?.urls ?? [],
     synopsis: group?.synopsis ?? "",
@@ -101,6 +115,17 @@ export const GroupEditPanel: React.FC<IGroupEditPanel> = ({
     (ids) => formik.setFieldValue("tag_ids", ids)
   );
 
+  const containingGroupEntries = useMemo(() => {
+    return formik.values.containing_groups
+      .map((m) => {
+        return {
+          group: containingGroups.find((mm) => mm.id === m.group_id),
+          description: m.description,
+        };
+      })
+      .filter((m) => m.group !== undefined) as IRelatedGroupEntry[];
+  }, [formik.values.containing_groups, containingGroups]);
+
   function onSetStudio(item: Studio | null) {
     setStudio(item);
     formik.setFieldValue("studio_id", item ? item.id : null);
@@ -110,6 +135,10 @@ export const GroupEditPanel: React.FC<IGroupEditPanel> = ({
     setStudio(group.studio ?? null);
   }, [group.studio]);
 
+  useEffect(() => {
+    setContainingGroups(group.containing_groups?.map((m) => m.group) ?? []);
+  }, [group.containing_groups]);
+
   // set up hotkeys
   useEffect(() => {
     // Mousetrap.bind("u", (e) => {
@@ -366,6 +395,30 @@ export const GroupEditPanel: React.FC<IGroupEditPanel> = ({
     return renderField("tag_ids", title, tagsControl());
   }
 
+  function onSetContainingGroupEntries(input: IRelatedGroupEntry[]) {
+    setContainingGroups(input.map((m) => m.group));
+
+    const newGroups = input.map((m) => ({
+      group_id: m.group.id,
+      description: m.description,
+    }));
+
+    formik.setFieldValue("containing_groups", newGroups);
+  }
+
+  function renderContainingGroupsField() {
+    const title = intl.formatMessage({ id: "containing_groups" });
+    const control = (
+      <RelatedGroupTable
+        value={containingGroupEntries}
+        onUpdate={onSetContainingGroupEntries}
+        excludeIDs={group.id ? [group.id] : undefined}
+      />
+    );
+
+    return renderField("containing_groups", title, control);
+  }
+
   // TODO: CSS class
   return (
     <div>
@@ -394,6 +447,7 @@ export const GroupEditPanel: React.FC<IGroupEditPanel> = ({
         {renderInputField("aliases")}
         {renderDurationField("duration")}
         {renderDateField("date")}
+        {renderContainingGroupsField()}
         {renderStudioField()}
         {renderInputField("director")}
         {renderURLListField("urls", onScrapeGroupURL, urlScrapable)}

ui/v2.5/src/components/Groups/GroupDetails/GroupScenesPanel.tsx

@@ -1,6 +1,9 @@
 import React from "react";
 import * as GQL from "src/core/generated-graphql";
-import { GroupsCriterion } from "src/models/list-filter/criteria/groups";
+import {
+  GroupsCriterion,
+  GroupsCriterionOption,
+} from "src/models/list-filter/criteria/groups";
 import { ListFilterModel } from "src/models/list-filter/filter";
 import { SceneList } from "src/components/Scenes/SceneList";
 import { View } from "src/components/List/views";
@@ -8,13 +11,14 @@ import { View } from "src/components/List/views";
 interface IGroupScenesPanel {
   active: boolean;
   group: GQL.GroupDataFragment;
+  showSubGroupContent?: boolean;
 }
 
-export const GroupScenesPanel: React.FC<IGroupScenesPanel> = ({
-  active,
-  group,
-}) => {
-  function filterHook(filter: ListFilterModel) {
+function useFilterHook(
+  group: Pick<GQL.GroupDataFragment, "id" | "name">,
+  showSubGroupContent?: boolean
+) {
+  return (filter: ListFilterModel) => {
     const groupValue = { id: group.id, label: group.name };
     // if group is already present, then we modify it, otherwise add
     let groupCriterion = filter.criteria.find((c) => {
@@ -28,23 +32,35 @@ export const GroupScenesPanel: React.FC<IGroupScenesPanel> = ({
     ) {
       // add the group if not present
       if (
-        !groupCriterion.value.find((p) => {
+        !groupCriterion.value.items.find((p) => {
           return p.id === group.id;
         })
       ) {
-        groupCriterion.value.push(groupValue);
+        groupCriterion.value.items.push(groupValue);
       }
 
       groupCriterion.modifier = GQL.CriterionModifier.IncludesAll;
     } else {
       // overwrite
-      groupCriterion = new GroupsCriterion();
-      groupCriterion.value = [groupValue];
+      groupCriterion = new GroupsCriterion(GroupsCriterionOption);
+      groupCriterion.value = {
+        items: [groupValue],
+        depth: showSubGroupContent ? -1 : 0,
+        excluded: [],
+      };
       filter.criteria.push(groupCriterion);
     }
 
     return filter;
-  }
+  };
+}
+
+export const GroupScenesPanel: React.FC<IGroupScenesPanel> = ({
+  active,
+  group,
+  showSubGroupContent,
+}) => {
+  const filterHook = useFilterHook(group, showSubGroupContent);
 
   if (group && group.id) {
     return (
@@ -53,6 +69,7 @@ export const GroupScenesPanel: React.FC<IGroupScenesPanel> = ({
         defaultSort="group_scene_number"
         alterQuery={active}
         view={View.GroupScenes}
+        fromGroupId={group.id}
       />
     );
   }

ui/v2.5/src/components/Groups/GroupDetails/GroupSubGroupsPanel.tsx

@@ -0,0 +1,204 @@
+import React, { useMemo } from "react";
+import * as GQL from "src/core/generated-graphql";
+import { GroupList } from "../GroupList";
+import { ListFilterModel } from "src/models/list-filter/filter";
+import {
+  ContainingGroupsCriterionOption,
+  GroupsCriterion,
+} from "src/models/list-filter/criteria/groups";
+import {
+  useRemoveSubGroups,
+  useReorderSubGroupsMutation,
+} from "src/core/StashService";
+import { ButtonToolbar } from "react-bootstrap";
+import { ListOperationButtons } from "src/components/List/ListOperationButtons";
+import { useListContext } from "src/components/List/ListProvider";
+import {
+  PageSizeSelector,
+  SearchTermInput,
+} from "src/components/List/ListFilter";
+import { useFilter } from "src/components/List/FilterProvider";
+import { IFilteredListToolbar } from "src/components/List/FilteredListToolbar";
+import {
+  showWhenNoneSelected,
+  showWhenSelected,
+} from "src/components/List/ItemList";
+import { faMinus, faPlus } from "@fortawesome/free-solid-svg-icons";
+import { useIntl } from "react-intl";
+import { useToast } from "src/hooks/Toast";
+import { useModal } from "src/hooks/modal";
+import { AddSubGroupsDialog } from "./AddGroupsDialog";
+
+const useContainingGroupFilterHook = (
+  group: Pick<GQL.StudioDataFragment, "id" | "name">,
+  showSubGroupContent?: boolean
+) => {
+  return (filter: ListFilterModel) => {
+    const groupValue = { id: group.id, label: group.name };
+    // if studio is already present, then we modify it, otherwise add
+    let groupCriterion = filter.criteria.find((c) => {
+      return c.criterionOption.type === "containing_groups";
+    }) as GroupsCriterion | undefined;
+
+    if (groupCriterion) {
+      // add the group if not present
+      if (
+        !groupCriterion.value.items.find((p) => {
+          return p.id === group.id;
+        })
+      ) {
+        groupCriterion.value.items.push(groupValue);
+      }
+    } else {
+      groupCriterion = new GroupsCriterion(ContainingGroupsCriterionOption);
+      groupCriterion.value = {
+        items: [groupValue],
+        excluded: [],
+        depth: showSubGroupContent ? -1 : 0,
+      };
+      groupCriterion.modifier = GQL.CriterionModifier.Includes;
+      filter.criteria.push(groupCriterion);
+    }
+
+    filter.sortBy = "sub_group_order";
+    filter.sortDirection = GQL.SortDirectionEnum.Asc;
+
+    return filter;
+  };
+};
+
+const Toolbar: React.FC<IFilteredListToolbar> = ({
+  onEdit,
+  onDelete,
+  operations,
+}) => {
+  const { getSelected, onSelectAll, onSelectNone } = useListContext();
+  const { filter, setFilter } = useFilter();
+
+  return (
+    <ButtonToolbar className="filtered-list-toolbar">
+      <div>
+        <SearchTermInput filter={filter} onFilterUpdate={setFilter} />
+      </div>
+      <PageSizeSelector
+        pageSize={filter.itemsPerPage}
+        setPageSize={(size) => setFilter(filter.setPageSize(size))}
+      />
+      <ListOperationButtons
+        onSelectAll={onSelectAll}
+        onSelectNone={onSelectNone}
+        itemsSelected={getSelected().length > 0}
+        otherOperations={operations}
+        onEdit={onEdit}
+        onDelete={onDelete}
+      />
+    </ButtonToolbar>
+  );
+};
+
+interface IGroupSubGroupsPanel {
+  active: boolean;
+  group: GQL.GroupDataFragment;
+}
+
+export const GroupSubGroupsPanel: React.FC<IGroupSubGroupsPanel> = ({
+  active,
+  group,
+}) => {
+  const intl = useIntl();
+  const Toast = useToast();
+  const { modal, showModal, closeModal } = useModal();
+
+  const [reorderSubGroups] = useReorderSubGroupsMutation();
+  const mutateRemoveSubGroups = useRemoveSubGroups();
+
+  const filterHook = useContainingGroupFilterHook(group);
+
+  const defaultFilter = useMemo(() => {
+    const sortBy = "sub_group_order";
+    const ret = new ListFilterModel(GQL.FilterMode.Groups, undefined, {
+      defaultSortBy: sortBy,
+    });
+
+    // unset the sort by so that its not included in the URL
+    ret.sortBy = undefined;
+
+    return ret;
+  }, []);
+
+  async function removeSubGroups(
+    result: GQL.FindGroupsQueryResult,
+    filter: ListFilterModel,
+    selectedIds: Set<string>
+  ) {
+    try {
+      await mutateRemoveSubGroups(group.id, Array.from(selectedIds.values()));
+
+      Toast.success(
+        intl.formatMessage(
+          { id: "toast.removed_entity" },
+          {
+            count: selectedIds.size,
+            singularEntity: intl.formatMessage({ id: "group" }),
+            pluralEntity: intl.formatMessage({ id: "groups" }),
+          }
+        )
+      );
+    } catch (e) {
+      Toast.error(e);
+    }
+  }
+
+  async function onAddSubGroups() {
+    showModal(
+      <AddSubGroupsDialog containingGroup={group} onClose={closeModal} />
+    );
+  }
+
+  const otherOperations = [
+    {
+      text: intl.formatMessage({ id: "actions.add_sub_groups" }),
+      onClick: onAddSubGroups,
+      isDisplayed: showWhenNoneSelected,
+      postRefetch: true,
+      icon: faPlus,
+      buttonVariant: "secondary",
+    },
+    {
+      text: intl.formatMessage({ id: "actions.remove_from_containing_group" }),
+      onClick: removeSubGroups,
+      isDisplayed: showWhenSelected,
+      postRefetch: true,
+      icon: faMinus,
+      buttonVariant: "danger",
+    },
+  ];
+
+  function onMove(srcIds: string[], targetId: string, after: boolean) {
+    reorderSubGroups({
+      variables: {
+        input: {
+          group_id: group.id,
+          sub_group_ids: srcIds,
+          insert_at_id: targetId,
+          insert_after: after,
+        },
+      },
+    });
+  }
+
+  return (
+    <>
+      {modal}
+      <GroupList
+        defaultFilter={defaultFilter}
+        filterHook={filterHook}
+        alterQuery={active}
+        fromGroupId={group.id}
+        otherOperations={otherOperations}
+        onMove={onMove}
+        renderToolbar={(props) => <Toolbar {...props} />}
+      />
+    </>
+  );
+};

ui/v2.5/src/components/Groups/GroupDetails/RelatedGroupTable.tsx

@@ -0,0 +1,137 @@
+import React, { useMemo } from "react";
+import { FormattedMessage } from "react-intl";
+import * as GQL from "src/core/generated-graphql";
+import { Form, Row, Col } from "react-bootstrap";
+import { Group, GroupSelect } from "src/components/Groups/GroupSelect";
+import cx from "classnames";
+import { ListFilterModel } from "src/models/list-filter/filter";
+
+export type GroupSceneIndexMap = Map<string, number | undefined>;
+
+export interface IRelatedGroupEntry {
+  group: Group;
+  description?: GQL.InputMaybe<string> | undefined;
+}
+
+export const RelatedGroupTable: React.FC<{
+  value: IRelatedGroupEntry[];
+  onUpdate: (input: IRelatedGroupEntry[]) => void;
+  excludeIDs?: string[];
+  filterHook?: (f: ListFilterModel) => ListFilterModel;
+  disabled?: boolean;
+}> = (props) => {
+  const { value, onUpdate } = props;
+
+  const groupIDs = useMemo(() => value.map((m) => m.group.id), [value]);
+
+  const excludeIDs = useMemo(
+    () => [...groupIDs, ...(props.excludeIDs ?? [])],
+    [props.excludeIDs, groupIDs]
+  );
+
+  const updateFieldChanged = (index: number, description: string | null) => {
+    const newValues = value.map((existing, i) => {
+      if (i === index) {
+        return {
+          ...existing,
+          description,
+        };
+      }
+      return existing;
+    });
+
+    onUpdate(newValues);
+  };
+
+  function onGroupSet(index: number, groups: Group[]) {
+    if (!groups.length) {
+      // remove this entry
+      const newValues = value.filter((_, i) => i !== index);
+      onUpdate(newValues);
+      return;
+    }
+
+    const group = groups[0];
+
+    const newValues = value.map((existing, i) => {
+      if (i === index) {
+        return {
+          ...existing,
+          group: group,
+        };
+      }
+      return existing;
+    });
+
+    onUpdate(newValues);
+  }
+
+  function onNewGroupSet(groups: Group[]) {
+    if (!groups.length) {
+      return;
+    }
+
+    const group = groups[0];
+
+    const newValues = [
+      ...value,
+      {
+        group: group,
+        scene_index: null,
+      },
+    ];
+
+    onUpdate(newValues);
+  }
+
+  return (
+    <div className={cx("group-table", { "no-groups": !value.length })}>
+      <Row className="group-table-header">
+        <Col xs={9}></Col>
+        <Form.Label column xs={3} className="group-scene-number-header">
+          <FormattedMessage id="description" />
+        </Form.Label>
+      </Row>
+      {value.map((m, i) => (
+        <Row key={m.group.id} className="group-row">
+          <Col xs={9}>
+            <GroupSelect
+              onSelect={(items) => onGroupSet(i, items)}
+              values={[m.group!]}
+              excludeIds={excludeIDs}
+              filterHook={props.filterHook}
+              isDisabled={props.disabled}
+            />
+          </Col>
+          <Col xs={3}>
+            <Form.Control
+              className="text-input"
+              value={m.description ?? ""}
+              onChange={(e: React.ChangeEvent<HTMLInputElement>) => {
+                updateFieldChanged(
+                  i,
+                  e.currentTarget.value === "" ? null : e.currentTarget.value
+                );
+              }}
+              disabled={props.disabled}
+            />
+          </Col>
+        </Row>
+      ))}
+      <Row className="group-row">
+        <Col xs={12}>
+          <GroupSelect
+            // re-create this component to refresh the default values updating the excluded ids
+            // setting the key to the length of the groupIDs array will cause the component to re-render
+            key={groupIDs.length}
+            onSelect={(items) => onNewGroupSet(items)}
+            values={[]}
+            excludeIds={excludeIDs}
+            filterHook={props.filterHook}
+            isDisabled={props.disabled}
+          />
+        </Col>
+      </Row>
+    </div>
+  );
+};

ui/v2.5/src/components/Groups/GroupList.tsx

@@ -1,4 +1,4 @@
-import React, { useState } from "react";
+import React, { PropsWithChildren, useState } from "react";
 import { useIntl } from "react-intl";
 import cloneDeep from "lodash-es/cloneDeep";
 import Mousetrap from "mousetrap";
@@ -17,6 +17,35 @@ import { DeleteEntityDialog } from "../Shared/DeleteEntityDialog";
 import { GroupCardGrid } from "./GroupCardGrid";
 import { EditGroupsDialog } from "./EditGroupsDialog";
 import { View } from "../List/views";
+import {
+  IFilteredListToolbar,
+  IItemListOperation,
+} from "../List/FilteredListToolbar";
+
+const GroupExportDialog: React.FC<{
+  open?: boolean;
+  selectedIds: Set<string>;
+  isExportAll?: boolean;
+  onClose: () => void;
+}> = ({ open = false, selectedIds, isExportAll = false, onClose }) => {
+  if (!open) {
+    return null;
+  }
+
+  return (
+    <ExportDialog
+      exportInput={{
+        groups: {
+          ids: Array.from(selectedIds.values()),
+          all: isExportAll,
+        },
+      }}
+      onClose={onClose}
+    />
+  );
+};
+
+const filterMode = GQL.FilterMode.Groups;
 
 function getItems(result: GQL.FindGroupsQueryResult) {
   return result?.data?.findGroups?.groups ?? [];
@@ -26,24 +55,57 @@ function getCount(result: GQL.FindGroupsQueryResult) {
   return result?.data?.findGroups?.count ?? 0;
 }
 
-interface IGroupList {
+interface IGroupListContext {
   filterHook?: (filter: ListFilterModel) => ListFilterModel;
+  defaultFilter?: ListFilterModel;
   view?: View;
   alterQuery?: boolean;
+  selectable?: boolean;
+}
+
+export const GroupListContext: React.FC<
+  PropsWithChildren<IGroupListContext>
+> = ({ alterQuery, filterHook, defaultFilter, view, selectable, children }) => {
+  return (
+    <ItemListContext
+      filterMode={filterMode}
+      defaultFilter={defaultFilter}
+      useResult={useFindGroups}
+      getItems={getItems}
+      getCount={getCount}
+      alterQuery={alterQuery}
+      filterHook={filterHook}
+      view={view}
+      selectable={selectable}
+    >
+      {children}
+    </ItemListContext>
+  );
+};
+
+interface IGroupList extends IGroupListContext {
+  fromGroupId?: string;
+  onMove?: (srcIds: string[], targetId: string, after: boolean) => void;
+  renderToolbar?: (props: IFilteredListToolbar) => React.ReactNode;
+  otherOperations?: IItemListOperation<GQL.FindGroupsQueryResult>[];
 }
 
 export const GroupList: React.FC<IGroupList> = ({
   filterHook,
   alterQuery,
+  defaultFilter,
   view,
+  fromGroupId,
+  onMove,
+  selectable,
+  renderToolbar,
+  otherOperations: providedOperations = [],
 }) => {
   const intl = useIntl();
   const history = useHistory();
   const [isExportDialogOpen, setIsExportDialogOpen] = useState(false);
   const [isExportAll, setIsExportAll] = useState(false);
 
-  const filterMode = GQL.FilterMode.Groups;
-
   const otherOperations = [
     {
       text: intl.formatMessage({ id: "actions.view_random" }),
@@ -58,6 +120,7 @@ export const GroupList: React.FC<IGroupList> = ({
       text: intl.formatMessage({ id: "actions.export_all" }),
       onClick: onExportAll,
     },
+    ...providedOperations,
   ];
 
   function addKeybinds(
@@ -110,42 +173,23 @@ export const GroupList: React.FC<IGroupList> = ({
     selectedIds: Set<string>,
     onSelectChange: (id: string, selected: boolean, shiftKey: boolean) => void
   ) {
-    function maybeRenderGroupExportDialog() {
-      if (isExportDialogOpen) {
-        return (
-          <ExportDialog
-            exportInput={{
-              groups: {
-                ids: Array.from(selectedIds.values()),
-                all: isExportAll,
-              },
-            }}
-            onClose={() => setIsExportDialogOpen(false)}
-          />
-        );
-      }
-    }
-
-    function renderGroups() {
-      if (!result.data?.findGroups) return;
-
-      if (filter.displayMode === DisplayMode.Grid) {
-        return (
-          <GroupCardGrid
-            groups={result.data.findGroups.groups}
-            selectedIds={selectedIds}
-            onSelectChange={onSelectChange}
-          />
-        );
-      }
-      if (filter.displayMode === DisplayMode.List) {
-        return <h1>TODO</h1>;
-      }
-    }
     return (
       <>
-        {maybeRenderGroupExportDialog()}
-        {renderGroups()}
+        <GroupExportDialog
+          open={isExportDialogOpen}
+          selectedIds={selectedIds}
+          isExportAll={isExportAll}
+          onClose={() => setIsExportDialogOpen(false)}
+        />
+        {filter.displayMode === DisplayMode.Grid && (
+          <GroupCardGrid
+            groups={result.data?.findGroups.groups ?? []}
+            selectedIds={selectedIds}
+            onSelectChange={onSelectChange}
+            fromGroupId={fromGroupId}
+            onMove={onMove}
+          />
+        )}
       </>
     );
   }
@@ -173,15 +217,12 @@ export const GroupList: React.FC<IGroupList> = ({
   }
 
   return (
-    <ItemListContext
-      filterMode={filterMode}
-      useResult={useFindGroups}
-      getItems={getItems}
-      getCount={getCount}
+    <GroupListContext
       alterQuery={alterQuery}
       filterHook={filterHook}
       view={view}
-      selectable
+      defaultFilter={defaultFilter}
+      selectable={selectable}
     >
       <ItemList
         view={view}
@@ -190,7 +231,8 @@ export const GroupList: React.FC<IGroupList> = ({
         renderContent={renderContent}
         renderEditDialog={renderEditDialog}
         renderDeleteDialog={renderDeleteDialog}
+        renderToolbar={renderToolbar}
       />
-    </ItemListContext>
+    </GroupListContext>
   );
 };

ui/v2.5/src/components/Groups/GroupSelect.tsx

@@ -56,13 +56,14 @@ const groupSelectSort = PatchFunction(
   sortGroupsByRelevance
 );
 
-const _GroupSelect: React.FC<
+export const GroupSelect: React.FC<
   IFilterProps &
     IFilterValueProps<Group> & {
       hoverPlacement?: Placement;
       excludeIds?: string[];
+      filterHook?: (f: ListFilterModel) => ListFilterModel;
     }
-> = (props) => {
+> = PatchComponent("GroupSelect", (props) => {
   const [createGroup] = useGroupCreate();
 
   const { configuration } = React.useContext(ConfigurationContext);
@@ -75,12 +76,17 @@ const _GroupSelect: React.FC<
   const exclude = useMemo(() => props.excludeIds ?? [], [props.excludeIds]);
 
   async function loadGroups(input: string): Promise<Option[]> {
-    const filter = new ListFilterModel(GQL.FilterMode.Groups);
+    let filter = new ListFilterModel(GQL.FilterMode.Groups);
     filter.searchTerm = input;
     filter.currentPage = 1;
     filter.itemsPerPage = maxOptionsShown;
     filter.sortBy = "name";
     filter.sortDirection = GQL.SortDirectionEnum.Asc;
+
+    if (props.filterHook) {
+      filter = props.filterHook(filter);
+    }
+
     const query = await queryFindGroupsForSelect(filter);
     let ret = query.data.findGroups.groups.filter((group) => {
       // HACK - we should probably exclude these in the backend query, but
@@ -255,9 +261,7 @@ const _GroupSelect: React.FC<
       closeMenuOnSelect={!props.isMulti}
     />
   );
-};
-
-export const GroupSelect = PatchComponent("GroupSelect", _GroupSelect);
+});
 
 const _GroupIDSelect: React.FC<IFilterProps & IFilterIDProps<Group>> = (
   props

ui/v2.5/src/components/Groups/GroupTag.tsx

@@ -0,0 +1,28 @@
+import React from "react";
+import { Link } from "react-router-dom";
+import * as GQL from "src/core/generated-graphql";
+import { GroupLink } from "../Shared/TagLink";
+
+export const GroupTag: React.FC<{
+  group: Pick<GQL.GroupDataFragment, "id" | "name" | "front_image_path">;
+  linkType?: "scene" | "sub_group" | "details";
+  description?: string;
+}> = ({ group, linkType, description }) => {
+  return (
+    <div className="group-tag-container">
+      <Link to={`/groups/${group.id}`} className="group-tag col m-auto zoom-2">
+        <img
+          className="image-thumbnail"
+          alt={group.name ?? ""}
+          src={group.front_image_path ?? ""}
+        />
+      </Link>
+      <GroupLink
+        group={group}
+        description={description}
+        linkType={linkType}
+        className="d-block"
+      />
+    </div>
+  );
+};

ui/v2.5/src/components/Groups/RelatedGroupPopover.tsx

@@ -0,0 +1,110 @@
+import {
+  faFilm,
+  faArrowUpLong,
+  faArrowDownLong,
+} from "@fortawesome/free-solid-svg-icons";
+import React, { useMemo } from "react";
+import { Button, OverlayTrigger, Tooltip } from "react-bootstrap";
+import { Count } from "../Shared/PopoverCountButton";
+import { Icon } from "../Shared/Icon";
+import { HoverPopover } from "../Shared/HoverPopover";
+import { Link } from "react-router-dom";
+import NavUtils from "src/utils/navigation";
+import * as GQL from "src/core/generated-graphql";
+import { useIntl } from "react-intl";
+import { GroupTag } from "./GroupTag";
+
+interface IProps {
+  group: Pick<
+    GQL.GroupDataFragment,
+    "id" | "name" | "containing_groups" | "sub_group_count"
+  >;
+}
+
+const ContainingGroupsCount: React.FC<IProps> = ({ group }) => {
+  const { containing_groups: containingGroups } = group;
+
+  const popoverContent = useMemo(() => {
+    if (!containingGroups.length) {
+      return [];
+    }
+
+    return containingGroups.map((entry) => (
+      <GroupTag
+        key={entry.group.id}
+        linkType="sub_group"
+        group={entry.group}
+        description={entry.description ?? undefined}
+      />
+    ));
+  }, [containingGroups]);
+
+  if (!containingGroups.length) {
+    return null;
+  }
+
+  return (
+    <HoverPopover
+      className="containing-group-count"
+      placement="bottom"
+      content={popoverContent}
+    >
+      <Link
+        to={NavUtils.makeContainingGroupsUrl(group)}
+        className="related-group-count"
+      >
+        <Count count={containingGroups.length} />
+        <Icon icon={faArrowUpLong} transform="shrink-4" />
+      </Link>
+    </HoverPopover>
+  );
+};
+
+const SubGroupCount: React.FC<IProps> = ({ group }) => {
+  const intl = useIntl();
+
+  const count = group.sub_group_count;
+
+  if (!count) {
+    return null;
+  }
+
+  function getTitle() {
+    const pluralCategory = intl.formatPlural(count);
+    const options = {
+      one: "sub_group",
+      other: "sub_groups",
+    };
+    const plural = intl.formatMessage({
+      id: options[pluralCategory as "one"] || options.other,
+    });
+    return `${count} ${plural}`;
+  }
+
+  return (
+    <OverlayTrigger
+      overlay={<Tooltip id={`sub-group-count-tooltip`}>{getTitle()}</Tooltip>}
+      placement="bottom"
+    >
+      <Link
+        to={NavUtils.makeSubGroupsUrl(group)}
+        className="related-group-count"
+      >
+        <Count count={count} />
+        <Icon icon={faArrowDownLong} transform="shrink-4" />
+      </Link>
+    </OverlayTrigger>
+  );
+};
+
+export const RelatedGroupPopoverButton: React.FC<IProps> = ({ group }) => {
+  return (
+    <span className="related-group-popover-button">
+      <Button className="minimal">
+        <Icon icon={faFilm} />
+        <ContainingGroupsCount group={group} />
+        <SubGroupCount group={group} />
+      </Button>
+    </span>
+  );
+};

ui/v2.5/src/components/Groups/styles.scss

@@ -14,7 +14,8 @@
     width: 100%;
   }
 
-  .group-scene-number {
+  .group-scene-number,
+  .group-containing-group-description {
     text-align: center;
   }
 
@@ -89,3 +90,24 @@
     }
   }
 }
+
+.groups-list {
+  list-style-type: none;
+  padding-inline-start: 0;
+
+  li {
+    display: inline;
+  }
+}
+
+.related-group-popover-button {
+  .containing-group-count {
+    display: inline-block;
+  }
+
+  .related-group-count .fa-icon {
+    color: $text-muted;
+    margin-left: 0;
+    margin-right: 0.25rem;
+  }
+}

ui/v2.5/src/components/List/FilteredListToolbar.tsx

@@ -31,14 +31,16 @@ export interface IItemListOperation<T extends QueryResult> {
   buttonVariant?: string;
 }
 
-export const FilteredListToolbar: React.FC<{
-  showEditFilter: (editingCriterion?: string) => void;
+export interface IFilteredListToolbar {
+  showEditFilter?: (editingCriterion?: string) => void;
   view?: View;
   onEdit?: () => void;
   onDelete?: () => void;
   operations?: IListFilterOperation[];
   zoomable?: boolean;
-}> = ({
+}
+
+export const FilteredListToolbar: React.FC<IFilteredListToolbar> = ({
   showEditFilter,
   view,
   onEdit,
@@ -60,13 +62,15 @@ export const FilteredListToolbar: React.FC<{
   }
 
   return (
-    <ButtonToolbar className="justify-content-center">
+    <ButtonToolbar className="filtered-list-toolbar">
+      {showEditFilter && (
         <ListFilter
           onFilterUpdate={setFilter}
           filter={filter}
           openFilterDialog={() => showEditFilter()}
           view={view}
         />
+      )}
       <ListOperationButtons
         onSelectAll={onSelectAll}
         onSelectNone={onSelectNone}

ui/v2.5/src/components/List/Filters/HierarchicalLabelValueFilter.tsx

@@ -22,7 +22,8 @@ export const HierarchicalLabelValueFilter: React.FC<
     inputType !== "studios" &&
     inputType !== "tags" &&
     inputType !== "scene_tags" &&
-    inputType !== "performer_tags"
+    inputType !== "performer_tags" &&
+    inputType !== "groups"
   ) {
     return null;
   }
@@ -53,21 +54,30 @@ export const HierarchicalLabelValueFilter: React.FC<
     if (inputType === "studios") {
       return "include-sub-studios";
     }
+    if (inputType === "groups") {
+      return "include-sub-groups";
+    }
     if (type === "children") {
       return "include-parent-tags";
     }
+    console.log(inputType);
     return "include-sub-tags";
   }
 
   function criterionOptionTypeToIncludeUIString(): MessageDescriptor {
-    const optionType =
-      inputType === "studios"
-        ? "include_sub_studios"
-        : type === "children"
-        ? "include_parent_tags"
-        : "include_sub_tags";
+    let id: string;
+    if (inputType === "studios") {
+      id = "include_sub_studios";
+    } else if (inputType === "groups") {
+      id = "include-sub-groups";
+    } else if (type === "children") {
+      id = "include_parent_tags";
+    } else {
+      id = "include_sub_tags";
+    }
+
     return {
-      id: optionType,
+      id,
     };
   }
 

ui/v2.5/src/components/List/ItemList.tsx

@@ -30,7 +30,11 @@ import {
   useListKeyboardShortcuts,
   useScrollToTopOnPageChange,
 } from "./util";
-import { FilteredListToolbar, IItemListOperation } from "./FilteredListToolbar";
+import {
+  FilteredListToolbar,
+  IFilteredListToolbar,
+  IItemListOperation,
+} from "./FilteredListToolbar";
 import { PagedList } from "./PagedList";
 
 interface IItemListProps<T extends QueryResult, E extends IHasID> {
@@ -59,6 +63,7 @@ interface IItemListProps<T extends QueryResult, E extends IHasID> {
     filter: ListFilterModel,
     selectedIds: Set<string>
   ) => () => void;
+  renderToolbar?: (props: IFilteredListToolbar) => React.ReactNode;
 }
 
 export const ItemList = <T extends QueryResult, E extends IHasID>(
@@ -73,6 +78,7 @@ export const ItemList = <T extends QueryResult, E extends IHasID>(
     renderDeleteDialog,
     renderMetadataByline,
     addKeybinds,
+    renderToolbar: providedToolbar,
   } = props;
 
   const { filter, setFilter: updateFilter } = useFilter();
@@ -142,6 +148,7 @@ export const ItemList = <T extends QueryResult, E extends IHasID>(
     }
   }, [addKeybinds, result, effectiveFilter, selectedIds]);
 
+  const operations = useMemo(() => {
     async function onOperationClicked(o: IItemListOperation<T>) {
       await o.onClick(result, effectiveFilter, selectedIds);
       if (o.postRefetch) {
@@ -149,7 +156,7 @@ export const ItemList = <T extends QueryResult, E extends IHasID>(
       }
     }
 
-  const operations = otherOperations?.map((o) => ({
+    return otherOperations?.map((o) => ({
       text: o.text,
       onClick: () => {
         onOperationClicked(o);
@@ -164,6 +171,7 @@ export const ItemList = <T extends QueryResult, E extends IHasID>(
       icon: o.icon,
       buttonVariant: o.buttonVariant,
     }));
+  }, [result, effectiveFilter, selectedIds, otherOperations]);
 
   function onEdit() {
     if (!renderEditDialog) {
@@ -215,16 +223,22 @@ export const ItemList = <T extends QueryResult, E extends IHasID>(
     updateFilter(filter.clearCriteria());
   }
 
+  const filterListToolbarProps = {
+    showEditFilter,
+    view: view,
+    operations: operations,
+    zoomable: zoomable,
+    onEdit: renderEditDialog ? onEdit : undefined,
+    onDelete: renderDeleteDialog ? onDelete : undefined,
+  };
+
   return (
     <div className="item-list-container">
-      <FilteredListToolbar
-        showEditFilter={showEditFilter}
-        view={view}
-        operations={operations}
-        zoomable={zoomable}
-        onEdit={renderEditDialog ? onEdit : undefined}
-        onDelete={renderDeleteDialog ? onDelete : undefined}
-      />
+      {providedToolbar ? (
+        providedToolbar(filterListToolbarProps)
+      ) : (
+        <FilteredListToolbar {...filterListToolbarProps} />
+      )}
       <FilterTags
         criteria={filter.criteria}
         onEditCriterion={(c) => showEditFilter(c.criterionOption.type)}
@@ -258,6 +272,7 @@ export const ItemList = <T extends QueryResult, E extends IHasID>(
 interface IItemListContextProps<T extends QueryResult, E extends IHasID> {
   filterMode: GQL.FilterMode;
   defaultSort?: string;
+  defaultFilter?: ListFilterModel;
   useResult: (filter: ListFilterModel) => T;
   getCount: (data: T) => number;
   getItems: (data: T) => E[];
@@ -275,6 +290,7 @@ export const ItemListContext = <T extends QueryResult, E extends IHasID>(
   const {
     filterMode,
     defaultSort,
+    defaultFilter: providedDefaultFilter,
     useResult,
     getCount,
     getItems,
@@ -287,10 +303,11 @@ export const ItemListContext = <T extends QueryResult, E extends IHasID>(
 
   const emptyFilter = useMemo(
     () =>
+      providedDefaultFilter?.clone() ??
       new ListFilterModel(filterMode, undefined, {
         defaultSortBy: defaultSort,
       }),
-    [filterMode, defaultSort]
+    [filterMode, defaultSort, providedDefaultFilter]
   );
 
   const [filter, setFilterState] = useState<ListFilterModel>(
@@ -343,3 +360,11 @@ export const showWhenSingleSelection = <T extends QueryResult>(
 ) => {
   return selectedIds.size == 1;
 };
+
+export const showWhenNoneSelected = <T extends QueryResult>(
+  result: T,
+  filter: ListFilterModel,
+  selectedIds: Set<string>
+) => {
+  return selectedIds.size === 0;
+};

ui/v2.5/src/components/List/ListFilter.tsx

@@ -1,5 +1,11 @@
 import cloneDeep from "lodash-es/cloneDeep";
-import React, { useCallback, useEffect, useRef, useState } from "react";
+import React, {
+  useCallback,
+  useEffect,
+  useMemo,
+  useRef,
+  useState,
+} from "react";
 import Mousetrap from "mousetrap";
 import { SortDirectionEnum } from "src/core/generated-graphql";
 import {
@@ -102,36 +108,17 @@ export const SearchTermInput: React.FC<{
   );
 };
 
-interface IListFilterProps {
-  onFilterUpdate: (newFilter: ListFilterModel) => void;
-  filter: ListFilterModel;
-  view?: View;
-  openFilterDialog: () => void;
-}
-
 const PAGE_SIZE_OPTIONS = ["20", "40", "60", "120", "250", "500", "1000"];
 
-export const ListFilter: React.FC<IListFilterProps> = ({
-  onFilterUpdate,
-  filter,
-  openFilterDialog,
-  view,
-}) => {
-  const [customPageSizeShowing, setCustomPageSizeShowing] = useState(false);
-  const perPageSelect = useRef(null);
-  const [perPageInput, perPageFocus] = useFocus();
-
-  const filterOptions = filter.options;
-
+export const PageSizeSelector: React.FC<{
+  pageSize: number;
+  setPageSize: (pageSize: number) => void;
+}> = ({ pageSize, setPageSize }) => {
   const intl = useIntl();
 
-  useEffect(() => {
-    Mousetrap.bind("r", () => onReshuffleRandomSort());
-
-    return () => {
-      Mousetrap.unbind("r");
-    };
-  });
+  const perPageSelect = useRef(null);
+  const [perPageInput, perPageFocus] = useFocus();
+  const [customPageSizeShowing, setCustomPageSizeShowing] = useState(false);
 
   useEffect(() => {
     if (customPageSizeShowing) {
@@ -139,6 +126,27 @@ export const ListFilter: React.FC<IListFilterProps> = ({
     }
   }, [customPageSizeShowing, perPageFocus]);
 
+  const pageSizeOptions = useMemo(() => {
+    const ret = PAGE_SIZE_OPTIONS.map((o) => {
+      return {
+        label: o,
+        value: o,
+      };
+    });
+    const currentPerPage = pageSize.toString();
+    if (!ret.find((o) => o.value === currentPerPage)) {
+      ret.push({ label: currentPerPage, value: currentPerPage });
+      ret.sort((a, b) => parseInt(a.value, 10) - parseInt(b.value, 10));
+    }
+
+    ret.push({
+      label: `${intl.formatMessage({ id: "custom" })}...`,
+      value: "custom",
+    });
+
+    return ret;
+  }, [intl, pageSize]);
+
   function onChangePageSize(val: string) {
     if (val === "custom") {
       // added timeout since Firefox seems to trigger the rootClose immediately
@@ -154,6 +162,94 @@ export const ListFilter: React.FC<IListFilterProps> = ({
       return;
     }
 
+    setPageSize(pp);
+  }
+
+  return (
+    <div className="page-size-selector">
+      <Form.Control
+        as="select"
+        ref={perPageSelect}
+        onChange={(e) => onChangePageSize(e.target.value)}
+        value={pageSize.toString()}
+        className="btn-secondary"
+      >
+        {pageSizeOptions.map((s) => (
+          <option value={s.value} key={s.value}>
+            {s.label}
+          </option>
+        ))}
+      </Form.Control>
+      <Overlay
+        target={perPageSelect.current}
+        show={customPageSizeShowing}
+        placement="bottom"
+        rootClose
+        onHide={() => setCustomPageSizeShowing(false)}
+      >
+        <Popover id="custom_pagesize_popover">
+          <Form inline>
+            <InputGroup>
+              <Form.Control
+                type="number"
+                min={1}
+                className="text-input"
+                ref={perPageInput}
+                onKeyPress={(e: React.KeyboardEvent<HTMLInputElement>) => {
+                  if (e.key === "Enter") {
+                    onChangePageSize(
+                      (perPageInput.current as HTMLInputElement)?.value ?? ""
+                    );
+                    e.preventDefault();
+                  }
+                }}
+              />
+              <InputGroup.Append>
+                <Button
+                  variant="primary"
+                  onClick={() =>
+                    onChangePageSize(
+                      (perPageInput.current as HTMLInputElement)?.value ?? ""
+                    )
+                  }
+                >
+                  <Icon icon={faCheck} />
+                </Button>
+              </InputGroup.Append>
+            </InputGroup>
+          </Form>
+        </Popover>
+      </Overlay>
+    </div>
+  );
+};
+
+interface IListFilterProps {
+  onFilterUpdate: (newFilter: ListFilterModel) => void;
+  filter: ListFilterModel;
+  view?: View;
+  openFilterDialog: () => void;
+}
+
+export const ListFilter: React.FC<IListFilterProps> = ({
+  onFilterUpdate,
+  filter,
+  openFilterDialog,
+  view,
+}) => {
+  const filterOptions = filter.options;
+
+  const intl = useIntl();
+
+  useEffect(() => {
+    Mousetrap.bind("r", () => onReshuffleRandomSort());
+
+    return () => {
+      Mousetrap.unbind("r");
+    };
+  });
+
+  function onChangePageSize(pp: number) {
     const newFilter = cloneDeep(filter);
     newFilter.itemsPerPage = pp;
     newFilter.currentPage = 1;
@@ -211,25 +307,6 @@ export const ListFilter: React.FC<IListFilterProps> = ({
       (o) => o.value === filter.sortBy
     );
 
-    const pageSizeOptions = PAGE_SIZE_OPTIONS.map((o) => {
-      return {
-        label: o,
-        value: o,
-      };
-    });
-    const currentPerPage = filter.itemsPerPage.toString();
-    if (!pageSizeOptions.find((o) => o.value === currentPerPage)) {
-      pageSizeOptions.push({ label: currentPerPage, value: currentPerPage });
-      pageSizeOptions.sort(
-        (a, b) => parseInt(a.value, 10) - parseInt(b.value, 10)
-      );
-    }
-
-    pageSizeOptions.push({
-      label: `${intl.formatMessage({ id: "custom" })}...`,
-      value: "custom",
-    });
-
     return (
       <>
         <div className="mb-2 d-flex">
@@ -301,63 +378,10 @@ export const ListFilter: React.FC<IListFilterProps> = ({
           )}
         </Dropdown>
 
-        <div className="mb-2">
-          <Form.Control
-            as="select"
-            ref={perPageSelect}
-            onChange={(e) => onChangePageSize(e.target.value)}
-            value={filter.itemsPerPage.toString()}
-            className="btn-secondary"
-          >
-            {pageSizeOptions.map((s) => (
-              <option value={s.value} key={s.value}>
-                {s.label}
-              </option>
-            ))}
-          </Form.Control>
-          <Overlay
-            target={perPageSelect.current}
-            show={customPageSizeShowing}
-            placement="bottom"
-            rootClose
-            onHide={() => setCustomPageSizeShowing(false)}
-          >
-            <Popover id="custom_pagesize_popover">
-              <Form inline>
-                <InputGroup>
-                  <Form.Control
-                    type="number"
-                    min={1}
-                    className="text-input"
-                    ref={perPageInput}
-                    onKeyPress={(e: React.KeyboardEvent<HTMLInputElement>) => {
-                      if (e.key === "Enter") {
-                        onChangePageSize(
-                          (perPageInput.current as HTMLInputElement)?.value ??
-                            ""
-                        );
-                        e.preventDefault();
-                      }
-                    }}
+        <PageSizeSelector
+          pageSize={filter.itemsPerPage}
+          setPageSize={onChangePageSize}
         />
-                  <InputGroup.Append>
-                    <Button
-                      variant="primary"
-                      onClick={() =>
-                        onChangePageSize(
-                          (perPageInput.current as HTMLInputElement)?.value ??
-                            ""
-                        )
-                      }
-                    >
-                      <Icon icon={faCheck} />
-                    </Button>
-                  </InputGroup.Append>
-                </InputGroup>
-              </Form>
-            </Popover>
-          </Overlay>
-        </div>
       </>
     );
   }

ui/v2.5/src/components/List/ListOperationButtons.tsx

@@ -1,4 +1,4 @@
-import React, { useEffect } from "react";
+import React, { PropsWithChildren, useEffect } from "react";
 import {
   Button,
   ButtonGroup,
@@ -16,6 +16,23 @@ import {
   faTrash,
 } from "@fortawesome/free-solid-svg-icons";
 
+export const OperationDropdown: React.FC<PropsWithChildren<{}>> = ({
+  children,
+}) => {
+  if (!children) return null;
+
+  return (
+    <Dropdown>
+      <Dropdown.Toggle variant="secondary" id="more-menu">
+        <Icon icon={faEllipsisH} />
+      </Dropdown.Toggle>
+      <Dropdown.Menu className="bg-secondary text-white">
+        {children}
+      </Dropdown.Menu>
+    </Dropdown>
+  );
+};
+
 export interface IListFilterOperation {
   text: string;
   onClick: () => void;
@@ -154,6 +171,11 @@ export const ListOperationButtons: React.FC<IListOperationButtonsProps> = ({
     if (otherOperations) {
       otherOperations
         .filter((o) => {
+          // buttons with icons are rendered in the button group
+          if (o.icon) {
+            return false;
+          }
+
           if (!o.isDisplayed) {
             return true;
           }
@@ -173,19 +195,12 @@ export const ListOperationButtons: React.FC<IListOperationButtonsProps> = ({
         });
     }
 
-    if (options.length > 0) {
     return (
-        <Dropdown>
-          <Dropdown.Toggle variant="secondary" id="more-menu">
-            <Icon icon={faEllipsisH} />
-          </Dropdown.Toggle>
-          <Dropdown.Menu className="bg-secondary text-white">
-            {options}
-          </Dropdown.Menu>
-        </Dropdown>
+      <OperationDropdown>
+        {options.length > 0 ? options : undefined}
+      </OperationDropdown>
     );
   }
-  }
 
   return (
     <>

ui/v2.5/src/components/List/ListProvider.tsx

@@ -66,6 +66,26 @@ export function useListContext<T extends IHasID = IHasID>() {
   return context as IListContextState<T>;
 }
 
+const emptyState: IListContextState = {
+  selectable: false,
+  selectedIds: new Set(),
+  getSelected: () => [],
+  onSelectChange: () => {},
+  onSelectAll: () => {},
+  onSelectNone: () => {},
+  items: [],
+};
+
+export function useListContextOptional<T extends IHasID = IHasID>() {
+  const context = React.useContext(ListStateContext);
+
+  if (context === null) {
+    return emptyState as IListContextState<T>;
+  }
+
+  return context as IListContextState<T>;
+}
+
 interface IQueryResultContextOptions<
   T extends QueryResult,
   E extends IHasID = IHasID

ui/v2.5/src/components/List/styles.scss

@@ -572,6 +572,10 @@ input[type="range"].zoom-slider {
   }
 }
 
+.filtered-list-toolbar {
+  justify-content: center;
+}
+
 .search-term-input {
   margin-right: 0.5rem;
 }

ui/v2.5/src/components/List/util.ts

@@ -7,6 +7,7 @@ import { QueryResult } from "@apollo/client";
 import { IHasID } from "src/utils/data";
 import { ConfigurationContext } from "src/hooks/Config";
 import { View } from "./views";
+import { usePrevious } from "src/hooks/state";
 
 export function useFilterURL(
   filter: ListFilterModel,
@@ -180,6 +181,25 @@ export function useListSelect<T extends { id: string }>(items: T[]) {
   const [selectedIds, setSelectedIds] = useState<Set<string>>(new Set());
   const [lastClickedId, setLastClickedId] = useState<string>();
 
+  const prevItems = usePrevious(items);
+
+  useEffect(() => {
+    if (prevItems === items) {
+      return;
+    }
+
+    // filter out any selectedIds that are no longer in the list
+    const newSelectedIds = new Set<string>();
+
+    selectedIds.forEach((id) => {
+      if (items.some((item) => item.id === id)) {
+        newSelectedIds.add(id);
+      }
+    });
+
+    setSelectedIds(newSelectedIds);
+  }, [prevItems, items, selectedIds]);
+
   function singleSelect(id: string, selected: boolean) {
     setLastClickedId(id);
 

ui/v2.5/src/components/List/views.ts

@@ -31,4 +31,5 @@ export enum View {
   StudioChildren = "studio_children",
 
   GroupScenes = "group_scenes",
+  GroupSubGroups = "group_sub_groups",
 }

ui/v2.5/src/components/Scenes/SceneCard.tsx

@@ -1,15 +1,10 @@
 import React, { useEffect, useMemo, useRef, useState } from "react";
 import { Button, ButtonGroup, OverlayTrigger, Tooltip } from "react-bootstrap";
-import { Link, useHistory } from "react-router-dom";
+import { useHistory } from "react-router-dom";
 import cx from "classnames";
 import * as GQL from "src/core/generated-graphql";
 import { Icon } from "../Shared/Icon";
-import {
-  GalleryLink,
-  TagLink,
-  GroupLink,
-  SceneMarkerLink,
-} from "../Shared/TagLink";
+import { GalleryLink, TagLink, SceneMarkerLink } from "../Shared/TagLink";
 import { HoverPopover } from "../Shared/HoverPopover";
 import { SweatDrops } from "../Shared/SweatDrops";
 import { TruncatedText } from "../Shared/TruncatedText";
@@ -20,7 +15,7 @@ import { ConfigurationContext } from "src/hooks/Config";
 import { PerformerPopoverButton } from "../Shared/PerformerPopoverButton";
 import { GridCard, calculateCardWidth } from "../Shared/GridCard/GridCard";
 import { RatingBanner } from "../Shared/RatingBanner";
-import { FormattedNumber } from "react-intl";
+import { FormattedMessage, FormattedNumber } from "react-intl";
 import {
   faBox,
   faCopy,
@@ -34,6 +29,7 @@ import { PreviewScrubber } from "./PreviewScrubber";
 import { PatchComponent } from "src/patch";
 import ScreenUtils from "src/utils/screen";
 import { StudioOverlay } from "../Shared/GridCard/StudioOverlay";
+import { GroupTag } from "../Groups/GroupTag";
 
 interface IScenePreviewProps {
   isPortrait: boolean;
@@ -106,8 +102,26 @@ interface ISceneCardProps {
   selected?: boolean | undefined;
   zoomIndex?: number;
   onSelectedChanged?: (selected: boolean, shiftKey: boolean) => void;
+  fromGroupId?: string;
 }
 
+const Description: React.FC<{
+  sceneNumber?: number;
+}> = ({ sceneNumber }) => {
+  if (!sceneNumber) return null;
+
+  return (
+    <>
+      <hr />
+      {sceneNumber !== undefined && (
+        <span className="scene-group-scene-number">
+          <FormattedMessage id="scene" /> #{sceneNumber}
+        </span>
+      )}
+    </>
+  );
+};
+
 const SceneCardPopovers = PatchComponent(
   "SceneCard.Popovers",
   (props: ISceneCardProps) => {
@@ -116,6 +130,17 @@ const SceneCardPopovers = PatchComponent(
       [props.scene]
     );
 
+    const sceneNumber = useMemo(() => {
+      if (!props.fromGroupId) {
+        return undefined;
+      }
+
+      const group = props.scene.groups.find(
+        (g) => g.group.id === props.fromGroupId
+      );
+      return group?.scene_index ?? undefined;
+    }, [props.fromGroupId, props.scene.groups]);
+
     function maybeRenderTagPopoverButton() {
       if (props.scene.tags.length <= 0) return;
 
@@ -147,23 +172,7 @@ const SceneCardPopovers = PatchComponent(
       if (props.scene.groups.length <= 0) return;
 
       const popoverContent = props.scene.groups.map((sceneGroup) => (
-        <div className="group-tag-container row" key={sceneGroup.group.id}>
-          <Link
-            to={`/groups/${sceneGroup.group.id}`}
-            className="group-tag col m-auto zoom-2"
-          >
-            <img
-              className="image-thumbnail"
-              alt={sceneGroup.group.name ?? ""}
-              src={sceneGroup.group.front_image_path ?? ""}
-            />
-          </Link>
-          <GroupLink
-            key={sceneGroup.group.id}
-            group={sceneGroup.group}
-            className="d-block"
-          />
-        </div>
+        <GroupTag key={sceneGroup.group.id} group={sceneGroup.group} />
       ));
 
       return (
@@ -283,10 +292,12 @@ const SceneCardPopovers = PatchComponent(
           props.scene.scene_markers.length > 0 ||
           props.scene?.o_counter ||
           props.scene.galleries.length > 0 ||
-          props.scene.organized)
+          props.scene.organized ||
+          sceneNumber !== undefined)
       ) {
         return (
           <>
+            <Description sceneNumber={sceneNumber} />
             <hr />
             <ButtonGroup className="card-popovers">
               {maybeRenderTagPopoverButton()}

ui/v2.5/src/components/Scenes/SceneCardsGrid.tsx

@@ -10,6 +10,7 @@ interface ISceneCardsGrid {
   selectedIds: Set<string>;
   zoomIndex: number;
   onSelectChange: (id: string, selected: boolean, shiftKey: boolean) => void;
+  fromGroupId?: string;
 }
 
 export const SceneCardsGrid: React.FC<ISceneCardsGrid> = ({
@@ -18,6 +19,7 @@ export const SceneCardsGrid: React.FC<ISceneCardsGrid> = ({
   selectedIds,
   zoomIndex,
   onSelectChange,
+  fromGroupId,
 }) => {
   const [componentRef, { width }] = useContainerDimensions();
   return (
@@ -35,6 +37,7 @@ export const SceneCardsGrid: React.FC<ISceneCardsGrid> = ({
           onSelectedChanged={(selected: boolean, shiftKey: boolean) =>
             onSelectChange(scene.id, selected, shiftKey)
           }
+          fromGroupId={fromGroupId}
         />
       ))}
     </div>

ui/v2.5/src/components/Scenes/SceneDetails/SceneGroupPanel.tsx

@@ -13,7 +13,7 @@ export const SceneGroupPanel: React.FC<ISceneGroupPanelProps> = (
     <GroupCard
       key={sceneGroup.group.id}
       group={sceneGroup.group}
-      sceneIndex={sceneGroup.scene_index ?? undefined}
+      sceneNumber={sceneGroup.scene_index ?? undefined}
     />
   ));
 

ui/v2.5/src/components/Scenes/SceneList.tsx

@@ -75,6 +75,7 @@ interface ISceneList {
   defaultSort?: string;
   view?: View;
   alterQuery?: boolean;
+  fromGroupId?: string;
 }
 
 export const SceneList: React.FC<ISceneList> = ({
@@ -82,6 +83,7 @@ export const SceneList: React.FC<ISceneList> = ({
   defaultSort,
   view,
   alterQuery,
+  fromGroupId,
 }) => {
   const intl = useIntl();
   const history = useHistory();
@@ -297,6 +299,7 @@ export const SceneList: React.FC<ISceneList> = ({
             zoomIndex={filter.zoomIndex}
             selectedIds={selectedIds}
             onSelectChange={onSelectChange}
+            fromGroupId={fromGroupId}
           />
         );
       }

ui/v2.5/src/components/Scenes/styles.scss

@@ -208,6 +208,10 @@ textarea.scene-description {
   &-preview {
     aspect-ratio: 16/9;
   }
+
+  .scene-group-scene-number {
+    text-align: center;
+  }
 }
 
 .scene-card,

ui/v2.5/src/components/Shared/GridCard/GridCard.tsx

@@ -1,10 +1,18 @@
-import React, { MutableRefObject, useRef, useState } from "react";
+import React, {
+  MutableRefObject,
+  PropsWithChildren,
+  useRef,
+  useState,
+} from "react";
 import { Card, Form } from "react-bootstrap";
 import { Link } from "react-router-dom";
 import cx from "classnames";
 import { TruncatedText } from "../TruncatedText";
 import ScreenUtils from "src/utils/screen";
 import useResizeObserver from "@react-hook/resize-observer";
+import { Icon } from "../Icon";
+import { faGripLines } from "@fortawesome/free-solid-svg-icons";
+import { DragSide, useDragMoveSelect } from "./dragMoveSelect";
 
 interface ICardProps {
   className?: string;
@@ -24,6 +32,10 @@ interface ICardProps {
   resumeTime?: number;
   duration?: number;
   interactiveHeatmap?: string;
+
+  // move logic - both of the following are required to enable move dragging
+  objectId?: string; // required for move dragging
+  onMove?: (srcIds: string[], targetId: string, after: boolean) => void;
 }
 
 export const calculateCardWidth = (
@@ -66,7 +78,72 @@ export const useContainerDimensions = <T extends HTMLElement = HTMLDivElement>(
   return [target, dimension];
 };
 
+const Checkbox: React.FC<{
+  selected?: boolean;
+  onSelectedChanged?: (selected: boolean, shiftKey: boolean) => void;
+}> = ({ selected = false, onSelectedChanged }) => {
+  let shiftKey = false;
+
+  return (
+    <Form.Control
+      type="checkbox"
+      // #2750 - add mousetrap class to ensure keyboard shortcuts work
+      className="card-check mousetrap"
+      checked={selected}
+      onChange={() => onSelectedChanged!(!selected, shiftKey)}
+      onClick={(event: React.MouseEvent<HTMLInputElement, MouseEvent>) => {
+        shiftKey = event.shiftKey;
+        event.stopPropagation();
+      }}
+    />
+  );
+};
+
+const DragHandle: React.FC<{
+  setInHandle: (inHandle: boolean) => void;
+}> = ({ setInHandle }) => {
+  function onMouseEnter() {
+    setInHandle(true);
+  }
+
+  function onMouseLeave() {
+    setInHandle(false);
+  }
+
+  return (
+    <span onMouseEnter={onMouseEnter} onMouseLeave={onMouseLeave}>
+      <Icon className="card-drag-handle" icon={faGripLines} />
+    </span>
+  );
+};
+
+const Controls: React.FC<PropsWithChildren<{}>> = ({ children }) => {
+  return <div className="card-controls">{children}</div>;
+};
+
+const MoveTarget: React.FC<{ dragSide: DragSide }> = ({ dragSide }) => {
+  if (dragSide === undefined) {
+    return null;
+  }
+
+  return (
+    <div
+      className={`move-target move-target-${
+        dragSide === DragSide.BEFORE ? "before" : "after"
+      }`}
+    ></div>
+  );
+};
+
 export const GridCard: React.FC<ICardProps> = (props: ICardProps) => {
+  const { setInHandle, moveTarget, dragProps } = useDragMoveSelect({
+    selecting: props.selecting || false,
+    selected: props.selected || false,
+    onSelectedChanged: props.onSelectedChanged,
+    objectId: props.objectId,
+    onMove: props.onMove,
+  });
+
   function handleImageClick(event: React.MouseEvent<HTMLElement, MouseEvent>) {
     const { shiftKey } = event;
 
@@ -80,49 +157,6 @@ export const GridCard: React.FC<ICardProps> = (props: ICardProps) => {
     }
   }
 
-  function handleDrag(event: React.DragEvent<HTMLElement>) {
-    if (props.selecting) {
-      event.dataTransfer.setData("text/plain", "");
-      event.dataTransfer.setDragImage(new Image(), 0, 0);
-    }
-  }
-
-  function handleDragOver(event: React.DragEvent<HTMLElement>) {
-    const ev = event;
-    const shiftKey = false;
-
-    if (!props.onSelectedChanged) {
-      return;
-    }
-
-    if (props.selecting && !props.selected) {
-      props.onSelectedChanged(true, shiftKey);
-    }
-
-    ev.dataTransfer.dropEffect = "move";
-    ev.preventDefault();
-  }
-
-  let shiftKey = false;
-
-  function maybeRenderCheckbox() {
-    if (props.onSelectedChanged) {
-      return (
-        <Form.Control
-          type="checkbox"
-          // #2750 - add mousetrap class to ensure keyboard shortcuts work
-          className="card-check mousetrap"
-          checked={props.selected}
-          onChange={() => props.onSelectedChanged!(!props.selected, shiftKey)}
-          onClick={(event: React.MouseEvent<HTMLInputElement, MouseEvent>) => {
-            shiftKey = event.shiftKey;
-            event.stopPropagation();
-          }}
-        />
-      );
-    }
-  }
-
   function maybeRenderInteractiveHeatmap() {
     if (props.interactiveHeatmap) {
       return (
@@ -156,16 +190,26 @@ export const GridCard: React.FC<ICardProps> = (props: ICardProps) => {
     <Card
       className={cx(props.className, "grid-card")}
       onClick={handleImageClick}
-      onDragStart={handleDrag}
-      onDragOver={handleDragOver}
-      draggable={props.onSelectedChanged && props.selecting}
+      {...dragProps}
       style={
         props.width && !ScreenUtils.isMobile()
           ? { width: `${props.width}px` }
           : {}
       }
     >
-      {maybeRenderCheckbox()}
+      {moveTarget !== undefined && <MoveTarget dragSide={moveTarget} />}
+      <Controls>
+        {props.onSelectedChanged && (
+          <Checkbox
+            selected={props.selected}
+            onSelectedChanged={props.onSelectedChanged}
+          />
+        )}
+
+        {!!props.objectId && props.onMove && (
+          <DragHandle setInHandle={setInHandle} />
+        )}
+      </Controls>
 
       <div className={cx(props.thumbnailSectionClassName, "thumbnail-section")}>
         <Link

ui/v2.5/src/components/Shared/GridCard/dragMoveSelect.ts

@@ -0,0 +1,143 @@
+import { useState } from "react";
+import { useListContextOptional } from "src/components/List/ListProvider";
+
+export enum DragSide {
+  BEFORE,
+  AFTER,
+}
+
+export function useDragMoveSelect(props: {
+  selecting: boolean;
+  selected: boolean;
+  onSelectedChanged?: (selected: boolean, shiftKey: boolean) => void;
+  objectId?: string;
+  onMove?: (srcIds: string[], targetId: string, after: boolean) => void;
+}) {
+  const { selectedIds } = useListContextOptional();
+
+  const [inHandle, setInHandle] = useState(false);
+  const [moveSrc, setMoveSrc] = useState(false);
+  const [moveTarget, setMoveTarget] = useState<DragSide | undefined>();
+
+  const canSelect = props.onSelectedChanged && props.selecting;
+  const canMove = !!props.objectId && props.onMove && inHandle;
+  const draggable = canSelect || canMove;
+
+  function onDragStart(event: React.DragEvent<HTMLElement>) {
+    if (!draggable) {
+      event.preventDefault();
+      return;
+    }
+
+    if (!inHandle && props.selecting) {
+      event.dataTransfer.setData("text/plain", "");
+      // event.dataTransfer.setDragImage(new Image(), 0, 0);
+      event.dataTransfer.effectAllowed = "copy";
+      event.stopPropagation();
+    } else if (inHandle && props.objectId) {
+      if (selectedIds.size > 1 && selectedIds.has(props.objectId)) {
+        // moving all selected
+        const movingIds = Array.from(selectedIds.values()).join(",");
+        event.dataTransfer.setData("text/plain", movingIds);
+      } else {
+        // moving single
+        setMoveSrc(true);
+        event.dataTransfer.setData("text/plain", props.objectId);
+      }
+      event.dataTransfer.effectAllowed = "move";
+      event.stopPropagation();
+    }
+  }
+
+  function doSetMoveTarget(event: React.DragEvent<HTMLElement>) {
+    const isBefore =
+      event.nativeEvent.offsetX < event.currentTarget.clientWidth / 2;
+    if (isBefore && moveTarget !== DragSide.BEFORE) {
+      setMoveTarget(DragSide.BEFORE);
+    } else if (!isBefore && moveTarget !== DragSide.AFTER) {
+      setMoveTarget(DragSide.AFTER);
+    }
+  }
+
+  function onDragEnter(event: React.DragEvent<HTMLElement>) {
+    const ev = event;
+    const shiftKey = false;
+
+    if (ev.dataTransfer.effectAllowed === "copy") {
+      if (!props.onSelectedChanged) {
+        return;
+      }
+
+      if (props.selecting && !props.selected) {
+        props.onSelectedChanged(true, shiftKey);
+      }
+
+      ev.dataTransfer.dropEffect = "copy";
+      ev.preventDefault();
+    } else if (ev.dataTransfer.effectAllowed === "move" && !moveSrc) {
+      doSetMoveTarget(event);
+      ev.dataTransfer.dropEffect = "move";
+      ev.preventDefault();
+    } else {
+      ev.dataTransfer.dropEffect = "none";
+    }
+  }
+
+  function onDragLeave(event: React.DragEvent<HTMLElement>) {
+    if (event.currentTarget.contains(event.relatedTarget as Node)) {
+      return;
+    }
+
+    setMoveTarget(undefined);
+  }
+
+  function onDragOver(event: React.DragEvent<HTMLElement>) {
+    if (event.dataTransfer.effectAllowed === "move" && moveSrc) {
+      return;
+    }
+
+    doSetMoveTarget(event);
+
+    event.preventDefault();
+  }
+
+  function onDragEnd() {
+    setMoveTarget(undefined);
+    setMoveSrc(false);
+  }
+
+  function onDrop(event: React.DragEvent<HTMLElement>) {
+    const ev = event;
+
+    if (
+      ev.dataTransfer.effectAllowed === "copy" ||
+      !props.onMove ||
+      !props.objectId
+    ) {
+      return;
+    }
+
+    const srcIds = ev.dataTransfer.getData("text/plain").split(",");
+    const targetId = props.objectId;
+    const after = moveTarget === DragSide.AFTER;
+
+    props.onMove(srcIds, targetId, after);
+
+    onDragEnd();
+  }
+
+  return {
+    inHandle,
+    setInHandle,
+    moveTarget,
+    dragProps: {
+      draggable: draggable || undefined,
+      onDragStart,
+      onDragEnter,
+      onDragLeave,
+      onDragOver,
+      onDragEnd,
+      onDrop,
+    },
+  };
+}

ui/v2.5/src/components/Shared/GridCard/styles.scss

@@ -57,3 +57,28 @@
     transition: opacity 0.5s;
   }
 }
+
+.move-target {
+  align-items: center;
+  background-color: $primary;
+  color: $secondary;
+  display: flex;
+  height: 100%;
+  justify-content: center;
+  opacity: 0.5;
+  pointer-events: none;
+  position: absolute;
+  width: 10%;
+
+  &.move-target-before {
+    left: 0;
+  }
+
+  &.move-target-after {
+    right: 0;
+  }
+}
+
+.card-drag-handle {
+  filter: drop-shadow(1px 1px 1px rgba(0, 0, 0, 0.7));
+}

ui/v2.5/src/components/Shared/Icon.tsx

@@ -1,23 +1,16 @@
 import React from "react";
-import { FontAwesomeIcon } from "@fortawesome/react-fontawesome";
-import { IconDefinition, SizeProp } from "@fortawesome/fontawesome-svg-core";
+import {
+  FontAwesomeIcon,
+  FontAwesomeIconProps,
+} from "@fortawesome/react-fontawesome";
 import { PatchComponent } from "src/patch";
 
-interface IIcon {
-  icon: IconDefinition;
-  className?: string;
-  color?: string;
-  size?: SizeProp;
-}
-
-export const Icon: React.FC<IIcon> = PatchComponent(
+export const Icon: React.FC<FontAwesomeIconProps> = PatchComponent(
   "Icon",
-  ({ icon, className, color, size }) => (
+  (props) => (
     <FontAwesomeIcon
-      icon={icon}
-      className={`fa-icon ${className ?? ""}`}
-      color={color}
-      size={size}
+      {...props}
+      className={`fa-icon ${props.className ?? ""}`}
     />
   )
 );

ui/v2.5/src/components/Shared/MultiSet.tsx

@@ -1,5 +1,5 @@
 import React from "react";
-import { useIntl } from "react-intl";
+import { IntlShape, useIntl } from "react-intl";
 
 import * as GQL from "src/core/generated-graphql";
 import { Button, ButtonGroup } from "react-bootstrap";
@@ -52,15 +52,7 @@ const Select: React.FC<IMultiSetProps> = (props) => {
   );
 };
 
-export const MultiSet: React.FC<IMultiSetProps> = (props) => {
-  const intl = useIntl();
-  const modes = [
-    GQL.BulkUpdateIdMode.Set,
-    GQL.BulkUpdateIdMode.Add,
-    GQL.BulkUpdateIdMode.Remove,
-  ];
-
-  function getModeText(mode: GQL.BulkUpdateIdMode) {
+function getModeText(intl: IntlShape, mode: GQL.BulkUpdateIdMode) {
   switch (mode) {
     case GQL.BulkUpdateIdMode.Set:
       return intl.formatMessage({
@@ -75,47 +67,81 @@ export const MultiSet: React.FC<IMultiSetProps> = (props) => {
         defaultMessage: "Remove",
       });
   }
-  }
+}
 
-  function onSetMode(mode: GQL.BulkUpdateIdMode) {
-    if (mode === props.mode) {
-      return;
-    }
+export const MultiSetModeButton: React.FC<{
+  mode: GQL.BulkUpdateIdMode;
+  active: boolean;
+  onClick: () => void;
+  disabled?: boolean;
+}> = ({ mode, active, onClick, disabled }) => {
+  const intl = useIntl();
 
-    // if going to Set, set the existing ids
-    if (mode === GQL.BulkUpdateIdMode.Set && props.existingIds) {
-      props.onUpdate(props.existingIds);
-      // if going from Set, wipe the ids
-    } else if (
-      mode !== GQL.BulkUpdateIdMode.Set &&
-      props.mode === GQL.BulkUpdateIdMode.Set
-    ) {
-      props.onUpdate([]);
-    }
-
-    props.onSetMode(mode);
-  }
-
-  function renderModeButton(mode: GQL.BulkUpdateIdMode) {
   return (
     <Button
       key={mode}
       variant="primary"
-        active={props.mode === mode}
+      active={active}
       size="sm"
-        onClick={() => onSetMode(mode)}
-        disabled={props.disabled}
+      onClick={onClick}
+      disabled={disabled}
     >
-        {getModeText(mode)}
+      {getModeText(intl, mode)}
     </Button>
   );
+};
+
+const modes = [
+  GQL.BulkUpdateIdMode.Set,
+  GQL.BulkUpdateIdMode.Add,
+  GQL.BulkUpdateIdMode.Remove,
+];
+
+export const MultiSetModeButtons: React.FC<{
+  mode: GQL.BulkUpdateIdMode;
+  onSetMode: (mode: GQL.BulkUpdateIdMode) => void;
+  disabled?: boolean;
+}> = ({ mode, onSetMode, disabled }) => {
+  return (
+    <ButtonGroup className="button-group-above">
+      {modes.map((m) => (
+        <MultiSetModeButton
+          key={m}
+          mode={m}
+          active={mode === m}
+          onClick={() => onSetMode(m)}
+          disabled={disabled}
+        />
+      ))}
+    </ButtonGroup>
+  );
+};
+
+export const MultiSet: React.FC<IMultiSetProps> = (props) => {
+  const { mode, onUpdate, existingIds } = props;
+
+  function onSetMode(m: GQL.BulkUpdateIdMode) {
+    if (m === mode) {
+      return;
+    }
+
+    // if going to Set, set the existing ids
+    if (m === GQL.BulkUpdateIdMode.Set && existingIds) {
+      onUpdate(existingIds);
+      // if going from Set, wipe the ids
+    } else if (
+      m !== GQL.BulkUpdateIdMode.Set &&
+      mode === GQL.BulkUpdateIdMode.Set
+    ) {
+      onUpdate([]);
+    }
+
+    props.onSetMode(m);
   }
 
   return (
     <div className="multi-set">
-      <ButtonGroup className="button-group-above">
-        {modes.map((m) => renderModeButton(m))}
-      </ButtonGroup>
+      <MultiSetModeButtons mode={mode} onSetMode={onSetMode} />
       <Select {...props} />
     </div>
   );

ui/v2.5/src/components/Shared/PopoverCountButton.tsx

@@ -7,7 +7,7 @@ import {
   faVideo,
   faMapMarkerAlt,
 } from "@fortawesome/free-solid-svg-icons";
-import React, { useMemo } from "react";
+import React from "react";
 import { Button, OverlayTrigger, Tooltip } from "react-bootstrap";
 import { FormattedNumber, useIntl } from "react-intl";
 import { Link } from "react-router-dom";
@@ -15,12 +15,36 @@ import { ConfigurationContext } from "src/hooks/Config";
 import TextUtils from "src/utils/text";
 import { Icon } from "./Icon";
 
+export const Count: React.FC<{
+  count: number;
+}> = ({ count }) => {
+  const { configuration } = React.useContext(ConfigurationContext);
+  const abbreviateCounter = configuration?.ui.abbreviateCounters ?? false;
+
+  if (!abbreviateCounter) {
+    return <span>{count}</span>;
+  }
+
+  const formatted = TextUtils.abbreviateCounter(count);
+
+  return (
+    <span>
+      <FormattedNumber
+        value={formatted.size}
+        maximumFractionDigits={formatted.digits}
+      />
+      {formatted.unit}
+    </span>
+  );
+};
+
 type PopoverLinkType =
   | "scene"
   | "image"
   | "gallery"
   | "marker"
   | "group"
+  | "sub_group"
   | "performer"
   | "studio";
 
@@ -37,11 +61,9 @@ export const PopoverCountButton: React.FC<IProps> = ({
   type,
   count,
 }) => {
-  const { configuration } = React.useContext(ConfigurationContext);
-  const abbreviateCounter = configuration?.ui.abbreviateCounters ?? false;
-
   const intl = useIntl();
 
+  // TODO - refactor - create SceneIcon, ImageIcon etc components
   function getIcon() {
     switch (type) {
       case "scene":
@@ -53,6 +75,7 @@ export const PopoverCountButton: React.FC<IProps> = ({
       case "marker":
         return faMapMarkerAlt;
       case "group":
+      case "sub_group":
         return faFilm;
       case "performer":
         return faUser;
@@ -88,6 +111,11 @@ export const PopoverCountButton: React.FC<IProps> = ({
           one: "group",
           other: "groups",
         };
+      case "sub_group":
+        return {
+          one: "sub_group",
+          other: "sub_groups",
+        };
       case "performer":
         return {
           one: "performer",
@@ -104,27 +132,12 @@ export const PopoverCountButton: React.FC<IProps> = ({
   function getTitle() {
     const pluralCategory = intl.formatPlural(count);
     const options = getPluralOptions();
-    const plural = options[pluralCategory as "one"] || options.other;
+    const plural = intl.formatMessage({
+      id: options[pluralCategory as "one"] || options.other,
+    });
     return `${count} ${plural}`;
   }
 
-  const countEl = useMemo(() => {
-    if (!abbreviateCounter) {
-      return count;
-    }
-
-    const formatted = TextUtils.abbreviateCounter(count);
-    return (
-      <span>
-        <FormattedNumber
-          value={formatted.size}
-          maximumFractionDigits={formatted.digits}
-        />
-        {formatted.unit}
-      </span>
-    );
-  }, [count, abbreviateCounter]);
-
   return (
     <>
       <OverlayTrigger
@@ -134,7 +147,7 @@ export const PopoverCountButton: React.FC<IProps> = ({
         <Link className={className} to={url}>
           <Button className="minimal">
             <Icon icon={getIcon()} />
-            <span>{countEl}</span>
+            <Count count={count} />
           </Button>
         </Link>
       </OverlayTrigger>

ui/v2.5/src/components/Shared/TagLink.tsx

@@ -73,12 +73,14 @@ export const PerformerLink: React.FC<IPerformerLinkProps> = ({
 
 interface IGroupLinkProps {
   group: INamedObject;
-  linkType?: "scene";
+  description?: string;
+  linkType?: "scene" | "sub_group" | "details";
   className?: string;
 }
 
 export const GroupLink: React.FC<IGroupLinkProps> = ({
   group,
+  description,
   linkType = "scene",
   className,
 }) => {
@@ -86,6 +88,10 @@ export const GroupLink: React.FC<IGroupLinkProps> = ({
     switch (linkType) {
       case "scene":
         return NavUtils.makeGroupScenesUrl(group);
+      case "sub_group":
+        return NavUtils.makeSubGroupsUrl(group);
+      case "details":
+        return NavUtils.makeGroupUrl(group.id ?? "");
     }
   }, [group, linkType]);
 
@@ -93,7 +99,10 @@ export const GroupLink: React.FC<IGroupLinkProps> = ({
 
   return (
     <CommonLinkComponent link={link} className={className}>
-      {title}
+      {title}{" "}
+      {description && (
+        <span className="group-description">({description})</span>
+      )}
     </CommonLinkComponent>
   );
 };

ui/v2.5/src/components/Shared/styles.scss

@@ -234,29 +234,47 @@ button.collapse-button.btn-primary:not(:disabled):not(.disabled):active {
     height: 5px;
   }
 
-  .card-check {
+  .card-controls {
+    align-items: center;
+    display: flex;
     left: 0.5rem;
-    margin-top: -12px;
-    opacity: 0;
-    padding-left: 15px;
+
     position: absolute;
     top: 0.7rem;
-    width: 1.2rem;
     z-index: 1;
+  }
+
+  .card-check,
+  .card-drag-handle {
+    height: 1.2rem;
+    opacity: 0;
+    width: 1.2rem;
+
+    @media (hover: none), (pointer: coarse) {
+      // always show card controls when hovering not supported
+      opacity: 0.25;
+    }
+  }
+
+  .card-drag-handle {
+    cursor: move;
+  }
+
+  .card-check {
+    padding-left: 15px;
 
     &:checked {
       opacity: 0.75;
     }
 
     @media (hover: none), (pointer: coarse) {
-      // always show card check button when hovering not supported
-      opacity: 0.25;
-      // and make it bigger
+      // and make it bigger when hovering not supported
       width: 1.5rem;
     }
   }
 
-  &:hover .card-check {
+  &:hover .card-check,
+  &:hover .card-drag-handle {
     opacity: 0.75;
     transition: opacity 0.5s;
   }

ui/v2.5/src/core/StashService.ts

@@ -1388,6 +1388,60 @@ export const useGroupsDestroy = (input: GQL.GroupsDestroyMutationVariables) =>
     },
   });
 
+export function useReorderSubGroupsMutation() {
+  return GQL.useReorderSubGroupsMutation({
+    update(cache) {
+      evictQueries(cache, [
+        GQL.FindGroupsDocument, // various filters
+      ]);
+    },
+  });
+}
+
+export const useAddSubGroups = () => {
+  const [addSubGroups] = GQL.useAddGroupSubGroupsMutation({
+    update(cache, result) {
+      if (!result.data?.addGroupSubGroups) return;
+
+      evictTypeFields(cache, groupMutationImpactedTypeFields);
+      evictQueries(cache, groupMutationImpactedQueries);
+    },
+  });
+
+  return (containingGroupId: string, toAdd: GQL.GroupDescriptionInput[]) => {
+    return addSubGroups({
+      variables: {
+        input: {
+          containing_group_id: containingGroupId,
+          sub_groups: toAdd,
+        },
+      },
+    });
+  };
+};
+
+export const useRemoveSubGroups = () => {
+  const [removeSubGroups] = GQL.useRemoveGroupSubGroupsMutation({
+    update(cache, result) {
+      if (!result.data?.removeGroupSubGroups) return;
+
+      evictTypeFields(cache, groupMutationImpactedTypeFields);
+      evictQueries(cache, groupMutationImpactedQueries);
+    },
+  });
+
+  return (containingGroupId: string, removeIds: string[]) => {
+    return removeSubGroups({
+      variables: {
+        input: {
+          containing_group_id: containingGroupId,
+          sub_group_ids: removeIds,
+        },
+      },
+    });
+  };
+};
+
 const sceneMarkerMutationImpactedTypeFields = {
   Tag: ["scene_marker_count"],
 };

ui/v2.5/src/locales/en-GB.json

@@ -4,6 +4,7 @@
     "add_directory": "Add Directory",
     "add_entity": "Add {entityType}",
     "add_manual_date": "Add manual date",
+    "add_sub_groups": "Add Sub-Groups",
     "add_o": "Add O",
     "add_play": "Add play",
     "add_to_entity": "Add to {entityType}",
@@ -91,6 +92,7 @@
     "reload_scrapers": "Reload scrapers",
     "remove": "Remove",
     "remove_date": "Remove date",
+    "remove_from_containing_group": "Remove from Group",
     "remove_from_gallery": "Remove from Gallery",
     "rename_gen_files": "Rename generated files",
     "rescan": "Rescan",
@@ -799,6 +801,9 @@
     "websocket_connection_failed": "Unable to make websocket connection: see browser console for details",
     "websocket_connection_reestablished": "Websocket connection re-established"
   },
+  "containing_group": "Containing Group",
+  "containing_group_count": "Containing Group Count",
+  "containing_groups": "Containing Groups",
   "countables": {
     "files": "{count, plural, one {File} other {Files}}",
     "galleries": "{count, plural, one {Gallery} other {Galleries}}",
@@ -1090,6 +1095,7 @@
   "image_index": "Image #",
   "images": "Images",
   "include_parent_tags": "Include parent tags",
+  "include_sub_group_content": "Include sub-group content",
   "include_sub_studio_content": "Include sub-studio content",
   "include_sub_studios": "Include subsidiary studios",
   "include_sub_tag_content": "Include sub-tag content",
@@ -1424,6 +1430,11 @@
   },
   "studio_tags": "Studio Tags",
   "studios": "Studios",
+  "sub_group": "Sub-Group",
+  "sub_group_count": "Sub-Group Count",
+  "sub_group_of": "Sub-group of {parent}",
+  "sub_group_order": "Sub-Group Order",
+  "sub_groups": "Sub-Groups",
   "sub_tag_count": "Sub-Tag Count",
   "sub_tag_of": "Sub-tag of {parent}",
   "sub_tags": "Sub-Tags",

ui/v2.5/src/models/list-filter/criteria/criterion.ts

@@ -319,6 +319,7 @@ export class IHierarchicalLabeledIdCriterion extends Criterion<IHierarchicalLabe
     // excluded only makes sense for includes and includes all
     // so reset it for other modifiers
     if (
+      this.value &&
       value !== CriterionModifier.Includes &&
       value !== CriterionModifier.IncludesAll
     ) {

ui/v2.5/src/models/list-filter/criteria/groups.ts

@@ -1,17 +1,44 @@
-import { ILabeledIdCriterion, ILabeledIdCriterionOption } from "./criterion";
+import { CriterionModifier } from "src/core/generated-graphql";
+import { CriterionOption, IHierarchicalLabeledIdCriterion } from "./criterion";
+import { CriterionType } from "../types";
 
 const inputType = "groups";
 
-export const GroupsCriterionOption = new ILabeledIdCriterionOption(
-  "groups",
-  "groups",
-  false,
-  inputType,
-  () => new GroupsCriterion()
-);
+const modifierOptions = [
+  CriterionModifier.Includes,
+  CriterionModifier.Excludes,
+  CriterionModifier.IsNull,
+  CriterionModifier.NotNull,
+];
 
-export class GroupsCriterion extends ILabeledIdCriterion {
-  constructor() {
-    super(GroupsCriterionOption);
+const defaultModifier = CriterionModifier.Includes;
+
+class BaseGroupsCriterionOption extends CriterionOption {
+  constructor(messageID: string, type: CriterionType) {
+    super({
+      messageID,
+      type,
+      modifierOptions,
+      defaultModifier,
+      inputType,
+      makeCriterion: () => new GroupsCriterion(this),
+    });
   }
 }
+
+export const GroupsCriterionOption = new BaseGroupsCriterionOption(
+  "groups",
+  "groups"
+);
+
+export class GroupsCriterion extends IHierarchicalLabeledIdCriterion {}
+
+export const ContainingGroupsCriterionOption = new BaseGroupsCriterionOption(
+  "containing_groups",
+  "containing_groups"
+);
+
+export const SubGroupsCriterionOption = new BaseGroupsCriterionOption(
+  "sub_groups",
+  "sub_groups"
+);

ui/v2.5/src/models/list-filter/filter.ts

@@ -488,6 +488,12 @@ export class ListFilterModel {
     return ret;
   }
 
+  public setPageSize(pageSize: number) {
+    const ret = this.clone();
+    ret.itemsPerPage = pageSize;
+    return ret;
+  }
+
   public changePage(page: number) {
     const ret = this.clone();
     ret.currentPage = page;

ui/v2.5/src/models/list-filter/groups.ts

@@ -13,6 +13,10 @@ import { DisplayMode } from "./types";
 import { RatingCriterionOption } from "./criteria/rating";
 // import { StudioTagsCriterionOption } from "./criteria/tags";
 import { TagsCriterionOption } from "./criteria/tags";
+import {
+  ContainingGroupsCriterionOption,
+  SubGroupsCriterionOption,
+} from "./criteria/groups";
 
 const defaultSortBy = "name";
 
@@ -23,6 +27,7 @@ const sortByOptions = [
   "duration",
   "rating",
   "tag_count",
+  "sub_group_order",
 ]
   .map(ListFilterOptions.createSortBy)
   .concat([
@@ -44,6 +49,10 @@ const criterionOptions = [
   RatingCriterionOption,
   PerformersCriterionOption,
   createDateCriterionOption("date"),
+  ContainingGroupsCriterionOption,
+  SubGroupsCriterionOption,
+  createMandatoryNumberCriterionOption("containing_group_count"),
+  createMandatoryNumberCriterionOption("sub_group_count"),
   TagsCriterionOption,
   createMandatoryNumberCriterionOption("tag_count"),
   createMandatoryTimestampCriterionOption("created_at"),

ui/v2.5/src/models/list-filter/types.ts

@@ -148,6 +148,10 @@ export type CriterionType =
   | "studios"
   | "scenes"
   | "groups"
+  | "containing_groups"
+  | "containing_group_count"
+  | "sub_groups"
+  | "sub_group_count"
   | "galleries"
   | "birth_year"
   | "age"

ui/v2.5/src/utils/bulkUpdate.ts

@@ -45,8 +45,11 @@ export function getAggregateStudioId(state: IHasStudio[]) {
   return ret;
 }
 
-export function getAggregateIds(sortedLists: string[][]) {
-  let ret: string[] = [];
+export function getAggregateIds<T>(
+  sortedLists: T[][],
+  isEqualFn: (a: T[], b: T[]) => boolean = isEqual
+) {
+  let ret: T[] = [];
   let first = true;
 
   sortedLists.forEach((l) => {
@@ -54,7 +57,7 @@ export function getAggregateIds(sortedLists: string[][]) {
       ret = l;
       first = false;
     } else {
-      if (!isEqual(ret, l)) {
+      if (!isEqualFn(ret, l)) {
         ret = [];
       }
     }

ui/v2.5/src/utils/navigation.ts

@@ -12,7 +12,12 @@ import {
   TagsCriterionOption,
 } from "src/models/list-filter/criteria/tags";
 import { ListFilterModel } from "src/models/list-filter/filter";
-import { GroupsCriterion } from "src/models/list-filter/criteria/groups";
+import {
+  ContainingGroupsCriterionOption,
+  GroupsCriterion,
+  GroupsCriterionOption,
+  SubGroupsCriterionOption,
+} from "src/models/list-filter/criteria/groups";
 import {
   Criterion,
   CriterionOption,
@@ -214,10 +219,12 @@ const makeChildStudiosUrl = (studio: Partial<GQL.StudioDataFragment>) => {
 const makeGroupScenesUrl = (group: Partial<GQL.GroupDataFragment>) => {
   if (!group.id) return "#";
   const filter = new ListFilterModel(GQL.FilterMode.Scenes, undefined);
-  const criterion = new GroupsCriterion();
-  criterion.value = [
-    { id: group.id, label: group.name || `Group ${group.id}` },
-  ];
+  const criterion = new GroupsCriterion(GroupsCriterionOption);
+  criterion.value = {
+    items: [{ id: group.id, label: group.name || `Group ${group.id}` }],
+    excluded: [],
+    depth: 0,
+  };
   filter.criteria.push(criterion);
   return `/scenes?${filter.makeQueryParameters()}`;
 };
@@ -382,6 +389,46 @@ const makePhotographerImagesUrl = (photographer: string) => {
   return `/images?${filter.makeQueryParameters()}`;
 };
 
+const makeGroupUrl = (id: string) => {
+  return `/groups/${id}`;
+};
+
+const makeContainingGroupsUrl = (group: Partial<GQL.SlimGroupDataFragment>) => {
+  if (!group.id) return "#";
+  const filter = new ListFilterModel(GQL.FilterMode.Groups, undefined);
+  const criterion = new GroupsCriterion(SubGroupsCriterionOption);
+  criterion.value = {
+    items: [
+      {
+        id: group.id,
+        label: group.name || `Group ${group.id}`,
+      },
+    ],
+    excluded: [],
+    depth: 0,
+  };
+  filter.criteria.push(criterion);
+  return `/groups?${filter.makeQueryParameters()}`;
+};
+
+const makeSubGroupsUrl = (group: INamedObject) => {
+  if (!group.id) return "#";
+  const filter = new ListFilterModel(GQL.FilterMode.Groups, undefined);
+  const criterion = new GroupsCriterion(ContainingGroupsCriterionOption);
+  criterion.value = {
+    items: [
+      {
+        id: group.id,
+        label: group.name || `Group ${group.id}`,
+      },
+    ],
+    excluded: [],
+    depth: 0,
+  };
+  filter.criteria.push(criterion);
+  return `/groups?${filter.makeQueryParameters()}`;
+};
+
 export function handleUnsavedChanges(
   intl: IntlShape,
   basepath: string,
@@ -409,6 +456,7 @@ const NavUtils = {
   makeStudioGroupsUrl: makeStudioGroupsUrl,
   makeStudioPerformersUrl,
   makeTagUrl,
+  makeGroupUrl,
   makeParentTagsUrl,
   makeChildTagsUrl,
   makeTagSceneMarkersUrl,
@@ -427,6 +475,8 @@ const NavUtils = {
   makePhotographerGalleriesUrl,
   makePhotographerImagesUrl,
   makeDirectorGroupsUrl,
+  makeContainingGroupsUrl,
+  makeSubGroupsUrl,
 };
 
 export default NavUtils;