Add tags to studios (#4858)

* Fix makeTagFilter mode

* Remove studio_tags filter criterion

This is handled by studios_filter. The support for this still needs to be added in the UI, so I have removed the criterion options in the short-term.
---------
Co-authored-by: WithoutPants <53250216+WithoutPants@users.noreply.github.com>

graphql/schema/types/filters.graphql

@@ -362,6 +362,8 @@ input StudioFilterType {
   parents: MultiCriterionInput
   "Filter by StashID"
   stash_id_endpoint: StashIDCriterionInput
+  "Filter to only include studios with these tags"
+  tags: HierarchicalMultiCriterionInput
   "Filter to only include studios missing this property"
   is_missing: String
   # rating expressed as 1-100
@@ -374,6 +376,8 @@ input StudioFilterType {
   image_count: IntCriterionInput
   "Filter by gallery count"
   gallery_count: IntCriterionInput
+  "Filter by tag count"
+  tag_count: IntCriterionInput
   "Filter by url"
   url: StringCriterionInput
   "Filter by studio aliases"
@@ -498,6 +502,9 @@ input TagFilterType {
   "Filter by number of performers with this tag"
   performer_count: IntCriterionInput
 
+  "Filter by number of studios with this tag"
+  studio_count: IntCriterionInput
+
   "Filter by number of movies with this tag"
   movie_count: IntCriterionInput
 

graphql/schema/types/studio.graphql

@@ -5,6 +5,7 @@ type Studio {
   parent_studio: Studio
   child_studios: [Studio!]!
   aliases: [String!]!
+  tags: [Tag!]!
   ignore_auto_tag: Boolean!
 
   image_path: String # Resolver
@@ -35,6 +36,7 @@ input StudioCreateInput {
   favorite: Boolean
   details: String
   aliases: [String!]
+  tag_ids: [ID!]
   ignore_auto_tag: Boolean
 }
 
@@ -51,6 +53,7 @@ input StudioUpdateInput {
   favorite: Boolean
   details: String
   aliases: [String!]
+  tag_ids: [ID!]
   ignore_auto_tag: Boolean
 }
 

graphql/schema/types/tag.graphql

@@ -13,6 +13,7 @@ type Tag {
   image_count(depth: Int): Int! # Resolver
   gallery_count(depth: Int): Int! # Resolver
   performer_count(depth: Int): Int! # Resolver
+  studio_count(depth: Int): Int! # Resolver
   movie_count(depth: Int): Int! # Resolver
   parents: [Tag!]!
   children: [Tag!]!

internal/api/resolver_model_studio.go

@@ -40,6 +40,20 @@ func (r *studioResolver) Aliases(ctx context.Context, obj *models.Studio) ([]str
 	return obj.Aliases.List(), nil
 }
 
+func (r *studioResolver) Tags(ctx context.Context, obj *models.Studio) (ret []*models.Tag, err error) {
+	if !obj.TagIDs.Loaded() {
+		if err := r.withReadTxn(ctx, func(ctx context.Context) error {
+			return obj.LoadTagIDs(ctx, r.repository.Studio)
+		}); err != nil {
+			return nil, err
+		}
+	}
+
+	var errs []error
+	ret, errs = loaders.From(ctx).TagByID.LoadAll(obj.TagIDs.List())
+	return ret, firstError(errs)
+}
+
 func (r *studioResolver) SceneCount(ctx context.Context, obj *models.Studio, depth *int) (ret int, err error) {
 	if err := r.withReadTxn(ctx, func(ctx context.Context) error {
 		ret, err = scene.CountByStudioID(ctx, r.repository.Scene, obj.ID, depth)

internal/api/resolver_model_tag.go

@@ -11,6 +11,7 @@ import (
 	"github.com/stashapp/stash/pkg/movie"
 	"github.com/stashapp/stash/pkg/performer"
 	"github.com/stashapp/stash/pkg/scene"
+	"github.com/stashapp/stash/pkg/studio"
 )
 
 func (r *tagResolver) Parents(ctx context.Context, obj *models.Tag) (ret []*models.Tag, err error) {
@@ -108,6 +109,17 @@ func (r *tagResolver) PerformerCount(ctx context.Context, obj *models.Tag, depth
 	return ret, nil
 }
 
+func (r *tagResolver) StudioCount(ctx context.Context, obj *models.Tag, depth *int) (ret int, err error) {
+	if err := r.withReadTxn(ctx, func(ctx context.Context) error {
+		ret, err = studio.CountByTagID(ctx, r.repository.Studio, obj.ID, depth)
+		return err
+	}); err != nil {
+		return 0, err
+	}
+
+	return ret, nil
+}
+
 func (r *tagResolver) MovieCount(ctx context.Context, obj *models.Tag, depth *int) (ret int, err error) {
 	if err := r.withReadTxn(ctx, func(ctx context.Context) error {
 		ret, err = movie.CountByTagID(ctx, r.repository.Movie, obj.ID, depth)

internal/api/resolver_mutation_studio.go

@@ -48,6 +48,11 @@ func (r *mutationResolver) StudioCreate(ctx context.Context, input models.Studio
 		return nil, fmt.Errorf("converting parent id: %w", err)
 	}
 
+	newStudio.TagIDs, err = translator.relatedIds(input.TagIds)
+	if err != nil {
+		return nil, fmt.Errorf("converting tag ids: %w", err)
+	}
+
 	// Process the base 64 encoded image string
 	var imageData []byte
 	if input.Image != nil {
@@ -114,6 +119,11 @@ func (r *mutationResolver) StudioUpdate(ctx context.Context, input models.Studio
 		return nil, fmt.Errorf("converting parent id: %w", err)
 	}
 
+	updatedStudio.TagIDs, err = translator.updateIds(input.TagIds, "tag_ids")
+	if err != nil {
+		return nil, fmt.Errorf("converting tag ids: %w", err)
+	}
+
 	// Process the base 64 encoded image string
 	var imageData []byte
 	imageIncluded := translator.hasField("image")

internal/manager/task_export.go

@@ -982,6 +982,7 @@ func (t *ExportTask) ExportStudios(ctx context.Context, workers int) {
 func (t *ExportTask) exportStudio(ctx context.Context, wg *sync.WaitGroup, jobChan <-chan *models.Studio) {
 	defer wg.Done()
 
+	r := t.repository
 	studioReader := t.repository.Studio
 
 	for s := range jobChan {
@@ -992,6 +993,18 @@ func (t *ExportTask) exportStudio(ctx context.Context, wg *sync.WaitGroup, jobCh
 			continue
 		}
 
+		tags, err := r.Tag.FindByStudioID(ctx, s.ID)
+		if err != nil {
+			logger.Errorf("[studios] <%s> error getting studio tags: %s", s.Name, err.Error())
+			continue
+		}
+
+		newStudioJSON.Tags = tag.GetNames(tags)
+
+		if t.includeDependencies {
+			t.tags.IDs = sliceutil.AppendUniques(t.tags.IDs, tag.GetIDs(tags))
+		}
+
 		fn := newStudioJSON.Filename()
 
 		if err := t.json.saveStudio(fn, newStudioJSON); err != nil {

internal/manager/task_import.go

@@ -292,8 +292,11 @@ func (t *ImportTask) ImportStudios(ctx context.Context) {
 }
 
 func (t *ImportTask) importStudio(ctx context.Context, studioJSON *jsonschema.Studio, pendingParent map[string][]*jsonschema.Studio) error {
+	r := t.repository
+
 	importer := &studio.Importer{
 		ReaderWriter:        t.repository.Studio,
+		TagWriter:           r.Tag,
 		Input:               *studioJSON,
 		MissingRefBehaviour: t.MissingRefBehaviour,
 	}

pkg/models/jsonschema/studio.go

@@ -22,6 +22,7 @@ type Studio struct {
 	Details       string           `json:"details,omitempty"`
 	Aliases       []string         `json:"aliases,omitempty"`
 	StashIDs      []models.StashID `json:"stash_ids,omitempty"`
+	Tags          []string         `json:"tags,omitempty"`
 	IgnoreAutoTag bool             `json:"ignore_auto_tag,omitempty"`
 }
 

pkg/models/mocks/StudioReaderWriter.go

@@ -58,6 +58,27 @@ func (_m *StudioReaderWriter) Count(ctx context.Context) (int, error) {
 	return r0, r1
 }
 
+// CountByTagID provides a mock function with given fields: ctx, tagID
+func (_m *StudioReaderWriter) CountByTagID(ctx context.Context, tagID int) (int, error) {
+	ret := _m.Called(ctx, tagID)
+
+	var r0 int
+	if rf, ok := ret.Get(0).(func(context.Context, int) int); ok {
+		r0 = rf(ctx, tagID)
+	} else {
+		r0 = ret.Get(0).(int)
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, int) error); ok {
+		r1 = rf(ctx, tagID)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // Create provides a mock function with given fields: ctx, newStudio
 func (_m *StudioReaderWriter) Create(ctx context.Context, newStudio *models.Studio) error {
 	ret := _m.Called(ctx, newStudio)
@@ -316,6 +337,29 @@ func (_m *StudioReaderWriter) GetStashIDs(ctx context.Context, relatedID int) ([
 	return r0, r1
 }
 
+// GetTagIDs provides a mock function with given fields: ctx, relatedID
+func (_m *StudioReaderWriter) GetTagIDs(ctx context.Context, relatedID int) ([]int, error) {
+	ret := _m.Called(ctx, relatedID)
+
+	var r0 []int
+	if rf, ok := ret.Get(0).(func(context.Context, int) []int); ok {
+		r0 = rf(ctx, relatedID)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]int)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, int) error); ok {
+		r1 = rf(ctx, relatedID)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // HasImage provides a mock function with given fields: ctx, studioID
 func (_m *StudioReaderWriter) HasImage(ctx context.Context, studioID int) (bool, error) {
 	ret := _m.Called(ctx, studioID)
@@ -367,6 +411,27 @@ func (_m *StudioReaderWriter) Query(ctx context.Context, studioFilter *models.St
 	return r0, r1, r2
 }
 
+// QueryCount provides a mock function with given fields: ctx, studioFilter, findFilter
+func (_m *StudioReaderWriter) QueryCount(ctx context.Context, studioFilter *models.StudioFilterType, findFilter *models.FindFilterType) (int, error) {
+	ret := _m.Called(ctx, studioFilter, findFilter)
+
+	var r0 int
+	if rf, ok := ret.Get(0).(func(context.Context, *models.StudioFilterType, *models.FindFilterType) int); ok {
+		r0 = rf(ctx, studioFilter, findFilter)
+	} else {
+		r0 = ret.Get(0).(int)
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, *models.StudioFilterType, *models.FindFilterType) error); ok {
+		r1 = rf(ctx, studioFilter, findFilter)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // QueryForAutoTag provides a mock function with given fields: ctx, words
 func (_m *StudioReaderWriter) QueryForAutoTag(ctx context.Context, words []string) ([]*models.Studio, error) {
 	ret := _m.Called(ctx, words)

pkg/models/mocks/TagReaderWriter.go

@@ -427,6 +427,29 @@ func (_m *TagReaderWriter) FindBySceneMarkerID(ctx context.Context, sceneMarkerI
 	return r0, r1
 }
 
+// FindByStudioID provides a mock function with given fields: ctx, studioID
+func (_m *TagReaderWriter) FindByStudioID(ctx context.Context, studioID int) ([]*models.Tag, error) {
+	ret := _m.Called(ctx, studioID)
+
+	var r0 []*models.Tag
+	if rf, ok := ret.Get(0).(func(context.Context, int) []*models.Tag); ok {
+		r0 = rf(ctx, studioID)
+	} else {
+		if ret.Get(0) != nil {
+			r0 = ret.Get(0).([]*models.Tag)
+		}
+	}
+
+	var r1 error
+	if rf, ok := ret.Get(1).(func(context.Context, int) error); ok {
+		r1 = rf(ctx, studioID)
+	} else {
+		r1 = ret.Error(1)
+	}
+
+	return r0, r1
+}
+
 // FindMany provides a mock function with given fields: ctx, ids
 func (_m *TagReaderWriter) FindMany(ctx context.Context, ids []int) ([]*models.Tag, error) {
 	ret := _m.Called(ctx, ids)

pkg/models/model_studio.go

@@ -19,6 +19,7 @@ type Studio struct {
 	IgnoreAutoTag bool   `json:"ignore_auto_tag"`
 
 	Aliases  RelatedStrings  `json:"aliases"`
+	TagIDs   RelatedIDs      `json:"tag_ids"`
 	StashIDs RelatedStashIDs `json:"stash_ids"`
 }
 
@@ -45,6 +46,7 @@ type StudioPartial struct {
 	IgnoreAutoTag OptionalBool
 
 	Aliases  *UpdateStrings
+	TagIDs   *UpdateIDs
 	StashIDs *UpdateStashIDs
 }
 
@@ -61,6 +63,12 @@ func (s *Studio) LoadAliases(ctx context.Context, l AliasLoader) error {
 	})
 }
 
+func (s *Studio) LoadTagIDs(ctx context.Context, l TagIDLoader) error {
+	return s.TagIDs.load(func() ([]int, error) {
+		return l.GetTagIDs(ctx, s.ID)
+	})
+}
+
 func (s *Studio) LoadStashIDs(ctx context.Context, l StashIDLoader) error {
 	return s.StashIDs.load(func() ([]StashID, error) {
 		return l.GetStashIDs(ctx, s.ID)
@@ -72,6 +80,10 @@ func (s *Studio) LoadRelationships(ctx context.Context, l PerformerReader) error
 		return err
 	}
 
+	if err := s.LoadTagIDs(ctx, l); err != nil {
+		return err
+	}
+
 	if err := s.LoadStashIDs(ctx, l); err != nil {
 		return err
 	}

pkg/models/repository_studio.go

@@ -22,6 +22,7 @@ type StudioFinder interface {
 // StudioQueryer provides methods to query studios.
 type StudioQueryer interface {
 	Query(ctx context.Context, studioFilter *StudioFilterType, findFilter *FindFilterType) ([]*Studio, int, error)
+	QueryCount(ctx context.Context, studioFilter *StudioFilterType, findFilter *FindFilterType) (int, error)
 }
 
 type StudioAutoTagQueryer interface {
@@ -36,6 +37,7 @@ type StudioAutoTagQueryer interface {
 // StudioCounter provides methods to count studios.
 type StudioCounter interface {
 	Count(ctx context.Context) (int, error)
+	CountByTagID(ctx context.Context, tagID int) (int, error)
 }
 
 // StudioCreator provides methods to create studios.
@@ -74,6 +76,7 @@ type StudioReader interface {
 
 	AliasLoader
 	StashIDLoader
+	TagIDLoader
 
 	All(ctx context.Context) ([]*Studio, error)
 	GetImage(ctx context.Context, studioID int) ([]byte, error)

pkg/models/repository_tag.go

@@ -22,6 +22,7 @@ type TagFinder interface {
 	FindByPerformerID(ctx context.Context, performerID int) ([]*Tag, error)
 	FindByMovieID(ctx context.Context, movieID int) ([]*Tag, error)
 	FindBySceneMarkerID(ctx context.Context, sceneMarkerID int) ([]*Tag, error)
+	FindByStudioID(ctx context.Context, studioID int) ([]*Tag, error)
 	FindByName(ctx context.Context, name string, nocase bool) (*Tag, error)
 	FindByNames(ctx context.Context, names []string, nocase bool) ([]*Tag, error)
 }

pkg/models/studio.go

@@ -14,6 +14,10 @@ type StudioFilterType struct {
 	IsMissing *string `json:"is_missing"`
 	// Filter by rating expressed as 1-100
 	Rating100 *IntCriterionInput `json:"rating100"`
+	// Filter to only include studios with these tags
+	Tags *HierarchicalMultiCriterionInput `json:"tags"`
+	// Filter by tag count
+	TagCount *IntCriterionInput `json:"tag_count"`
 	// Filter by favorite
 	Favorite *bool `json:"favorite"`
 	// Filter by scene count
@@ -53,6 +57,7 @@ type StudioCreateInput struct {
 	Favorite      *bool     `json:"favorite"`
 	Details       *string   `json:"details"`
 	Aliases       []string  `json:"aliases"`
+	TagIds        []string  `json:"tag_ids"`
 	IgnoreAutoTag *bool     `json:"ignore_auto_tag"`
 }
 
@@ -68,5 +73,6 @@ type StudioUpdateInput struct {
 	Favorite      *bool     `json:"favorite"`
 	Details       *string   `json:"details"`
 	Aliases       []string  `json:"aliases"`
+	TagIds        []string  `json:"tag_ids"`
 	IgnoreAutoTag *bool     `json:"ignore_auto_tag"`
 }

pkg/models/tag.go

@@ -20,6 +20,8 @@ type TagFilterType struct {
 	GalleryCount *IntCriterionInput `json:"gallery_count"`
 	// Filter by number of performers with this tag
 	PerformerCount *IntCriterionInput `json:"performer_count"`
+	// Filter by number of studios with this tag
+	StudioCount *IntCriterionInput `json:"studio_count"`
 	// Filter by number of movies with this tag
 	MovieCount *IntCriterionInput `json:"movie_count"`
 	// Filter by number of markers with this tag

pkg/sqlite/database.go

@@ -30,7 +30,7 @@ const (
 	dbConnTimeout = 30
 )
 
-var appSchemaVersion uint = 62
+var appSchemaVersion uint = 63
 
 //go:embed migrations/*.sql
 var migrationsBox embed.FS

pkg/sqlite/migrations/63_studio_tags.up.sql

@@ -0,0 +1,9 @@
+CREATE TABLE `studios_tags` (
+  `studio_id` integer NOT NULL,
+  `tag_id` integer NOT NULL,
+  foreign key(`studio_id`) references `studios`(`id`) on delete CASCADE,
+  foreign key(`tag_id`) references `tags`(`id`) on delete CASCADE,
+  PRIMARY KEY(`studio_id`, `tag_id`)
+);
+
+CREATE INDEX `index_studios_tags_on_tag_id` on `studios_tags` (`tag_id`);

pkg/sqlite/setup_test.go

@@ -207,6 +207,9 @@ const (
 	tagIdxWithPerformer
 	tagIdx1WithPerformer
 	tagIdx2WithPerformer
+	tagIdxWithStudio
+	tagIdx1WithStudio
+	tagIdx2WithStudio
 	tagIdxWithGallery
 	tagIdx1WithGallery
 	tagIdx2WithGallery
@@ -245,6 +248,10 @@ const (
 	studioIdxWithScenePerformer
 	studioIdxWithImagePerformer
 	studioIdxWithGalleryPerformer
+	studioIdxWithTag
+	studioIdx2WithTag
+	studioIdxWithTwoTags
+	studioIdxWithParentTag
 	studioIdxWithGrandChild
 	studioIdxWithParentAndChild
 	studioIdxWithGrandParent
@@ -510,6 +517,15 @@ var (
 	}
 )
 
+var (
+	studioTags = linkMap{
+		studioIdxWithTag:       {tagIdxWithStudio},
+		studioIdx2WithTag:      {tagIdx2WithStudio},
+		studioIdxWithTwoTags:   {tagIdx1WithStudio, tagIdx2WithStudio},
+		studioIdxWithParentTag: {tagIdxWithParentAndChild},
+	}
+)
+
 var (
 	performerTags = linkMap{
 		performerIdxWithTag:       {tagIdxWithPerformer},
@@ -1566,6 +1582,11 @@ func getTagPerformerCount(id int) int {
 	return len(performerTags.reverseLookup(idx))
 }
 
+func getTagStudioCount(id int) int {
+	idx := indexFromID(tagIDs, id)
+	return len(studioTags.reverseLookup(idx))
+}
+
 func getTagParentCount(id int) int {
 	if id == tagIDs[tagIdxWithParentTag] || id == tagIDs[tagIdxWithGrandParent] || id == tagIDs[tagIdxWithParentAndChild] {
 		return 1
@@ -1681,11 +1702,13 @@ func createStudios(ctx context.Context, n int, o int) error {
 		// studios [ i ] and [ n + o - i - 1  ] should have similar names with only the Name!=NaMe part different
 
 		name = getStudioStringValue(index, name)
+		tids := indexesToIDs(tagIDs, studioTags[i])
 		studio := models.Studio{
 			Name:          name,
 			URL:           getStudioStringValue(index, urlField),
 			Favorite:      getStudioBoolValue(index),
 			IgnoreAutoTag: getIgnoreAutoTag(i),
+			TagIDs:        models.NewRelatedIDs(tids),
 		}
 		// only add aliases for some scenes
 		if i == studioIdxWithMovie || i%5 == 0 {

pkg/sqlite/studio.go

@@ -25,6 +25,7 @@ const (
 	studioParentIDColumn  = "parent_id"
 	studioNameColumn      = "name"
 	studioImageBlobColumn = "image_blob"
+	studiosTagsTable      = "studios_tags"
 )
 
 type studioRow struct {
@@ -94,6 +95,7 @@ type studioRepositoryType struct {
 	repository
 
 	stashIDs stashIDRepository
+	tags     joinRepository
 
 	scenes    repository
 	images    repository
@@ -124,11 +126,21 @@ var (
 			tableName: galleryTable,
 			idColumn:  studioIDColumn,
 		},
+		tags: joinRepository{
+			repository: repository{
+				tableName: studiosTagsTable,
+				idColumn:  studioIDColumn,
+			},
+			fkColumn:     tagIDColumn,
+			foreignTable: tagTable,
+			orderBy:      "tags.name ASC",
+		},
 	}
 )
 
 type StudioStore struct {
 	blobJoinQueryBuilder
+	tagRelationshipStore
 
 	tableMgr *table
 }
@@ -139,6 +151,11 @@ func NewStudioStore(blobStore *BlobStore) *StudioStore {
 			blobStore: blobStore,
 			joinTable: studioTable,
 		},
+		tagRelationshipStore: tagRelationshipStore{
+			idRelationshipStore: idRelationshipStore{
+				joinTable: studiosTagsTableMgr,
+			},
+		},
 
 		tableMgr: studioTableMgr,
 	}
@@ -173,6 +190,10 @@ func (qb *StudioStore) Create(ctx context.Context, newObject *models.Studio) err
 		}
 	}
 
+	if err := qb.tagRelationshipStore.createRelationships(ctx, id, newObject.TagIDs); err != nil {
+		return err
+	}
+
 	if newObject.StashIDs.Loaded() {
 		if err := studiosStashIDsTableMgr.insertJoins(ctx, id, newObject.StashIDs.List()); err != nil {
 			return err
@@ -213,6 +234,10 @@ func (qb *StudioStore) UpdatePartial(ctx context.Context, input models.StudioPar
 		}
 	}
 
+	if err := qb.tagRelationshipStore.modifyRelationships(ctx, input.ID, input.TagIDs); err != nil {
+		return nil, err
+	}
+
 	if input.StashIDs != nil {
 		if err := studiosStashIDsTableMgr.modifyJoins(ctx, input.ID, input.StashIDs.StashIDs, input.StashIDs.Mode); err != nil {
 			return nil, err
@@ -237,6 +262,10 @@ func (qb *StudioStore) Update(ctx context.Context, updatedObject *models.Studio)
 		}
 	}
 
+	if err := qb.tagRelationshipStore.replaceRelationships(ctx, updatedObject.ID, updatedObject.TagIDs); err != nil {
+		return err
+	}
+
 	if updatedObject.StashIDs.Loaded() {
 		if err := studiosStashIDsTableMgr.replaceJoins(ctx, updatedObject.ID, updatedObject.StashIDs.List()); err != nil {
 			return err
@@ -538,6 +567,15 @@ func (qb *StudioStore) Query(ctx context.Context, studioFilter *models.StudioFil
 	return studios, countResult, nil
 }
 
+func (qb *StudioStore) QueryCount(ctx context.Context, studioFilter *models.StudioFilterType, findFilter *models.FindFilterType) (int, error) {
+	query, err := qb.makeQuery(ctx, studioFilter, findFilter)
+	if err != nil {
+		return 0, err
+	}
+
+	return query.executeCount(ctx)
+}
+
 var studioSortOptions = sortOptions{
 	"child_count",
 	"created_at",
@@ -569,6 +607,8 @@ func (qb *StudioStore) getStudioSort(findFilter *models.FindFilterType) (string,
 
 	sortQuery := ""
 	switch sort {
+	case "tag_count":
+		sortQuery += getCountSort(studioTable, studiosTagsTable, studioIDColumn, direction)
 	case "scenes_count":
 		sortQuery += getCountSort(studioTable, sceneTable, studioIDColumn, direction)
 	case "images_count":

pkg/sqlite/studio_filter.go

@@ -74,11 +74,13 @@ func (qb *studioFilterHandler) criterionHandler() criterionHandler {
 		},
 
 		qb.isMissingCriterionHandler(studioFilter.IsMissing),
+		qb.tagCountCriterionHandler(studioFilter.TagCount),
 		qb.sceneCountCriterionHandler(studioFilter.SceneCount),
 		qb.imageCountCriterionHandler(studioFilter.ImageCount),
 		qb.galleryCountCriterionHandler(studioFilter.GalleryCount),
 		qb.parentCriterionHandler(studioFilter.Parents),
 		qb.aliasCriterionHandler(studioFilter.Aliases),
+		qb.tagsCriterionHandler(studioFilter.Tags),
 		qb.childCountCriterionHandler(studioFilter.ChildCount),
 		&timestampCriterionHandler{studioFilter.CreatedAt, studioTable + ".created_at", nil},
 		&timestampCriterionHandler{studioFilter.UpdatedAt, studioTable + ".updated_at", nil},
@@ -161,6 +163,16 @@ func (qb *studioFilterHandler) galleryCountCriterionHandler(galleryCount *models
 	}
 }
 
+func (qb *studioFilterHandler) tagCountCriterionHandler(tagCount *models.IntCriterionInput) criterionHandlerFunc {
+	h := countCriterionHandlerBuilder{
+		primaryTable: studioTable,
+		joinTable:    studiosTagsTable,
+		primaryFK:    studioIDColumn,
+	}
+
+	return h.handler(tagCount)
+}
+
 func (qb *studioFilterHandler) parentCriterionHandler(parents *models.MultiCriterionInput) criterionHandlerFunc {
 	addJoinsFunc := func(f *filterBuilder) {
 		f.addLeftJoin("studios", "parent_studio", "parent_studio.id = studios.parent_id")
@@ -200,3 +212,18 @@ func (qb *studioFilterHandler) childCountCriterionHandler(childCount *models.Int
 		}
 	}
 }
+
+func (qb *studioFilterHandler) tagsCriterionHandler(tags *models.HierarchicalMultiCriterionInput) criterionHandlerFunc {
+	h := joinedHierarchicalMultiCriterionHandlerBuilder{
+		primaryTable: studioTable,
+		foreignTable: tagTable,
+		foreignFK:    "tag_id",
+
+		relationsTable: "tags_relations",
+		joinTable:      studiosTagsTable,
+		joinAs:         "studio_tag",
+		primaryFK:      studioIDColumn,
+	}
+
+	return h.handler(tags)
+}

pkg/sqlite/studio_test.go

@@ -704,6 +704,110 @@ func TestStudioQueryRating(t *testing.T) {
 	verifyStudiosRating(t, ratingCriterion)
 }
 
+func queryStudios(ctx context.Context, t *testing.T, studioFilter *models.StudioFilterType, findFilter *models.FindFilterType) []*models.Studio {
+	t.Helper()
+	studios, _, err := db.Studio.Query(ctx, studioFilter, findFilter)
+	if err != nil {
+		t.Errorf("Error querying studio: %s", err.Error())
+	}
+
+	return studios
+}
+
+func TestStudioQueryTags(t *testing.T) {
+	withTxn(func(ctx context.Context) error {
+		tagCriterion := models.HierarchicalMultiCriterionInput{
+			Value: []string{
+				strconv.Itoa(tagIDs[tagIdxWithStudio]),
+				strconv.Itoa(tagIDs[tagIdx1WithStudio]),
+			},
+			Modifier: models.CriterionModifierIncludes,
+		}
+
+		studioFilter := models.StudioFilterType{
+			Tags: &tagCriterion,
+		}
+
+		// ensure ids are correct
+		studios := queryStudios(ctx, t, &studioFilter, nil)
+		assert.Len(t, studios, 2)
+		for _, studio := range studios {
+			assert.True(t, studio.ID == studioIDs[studioIdxWithTag] || studio.ID == studioIDs[studioIdxWithTwoTags])
+		}
+
+		tagCriterion = models.HierarchicalMultiCriterionInput{
+			Value: []string{
+				strconv.Itoa(tagIDs[tagIdx1WithStudio]),
+				strconv.Itoa(tagIDs[tagIdx2WithStudio]),
+			},
+			Modifier: models.CriterionModifierIncludesAll,
+		}
+
+		studios = queryStudios(ctx, t, &studioFilter, nil)
+
+		assert.Len(t, studios, 1)
+		assert.Equal(t, sceneIDs[studioIdxWithTwoTags], studios[0].ID)
+
+		tagCriterion = models.HierarchicalMultiCriterionInput{
+			Value: []string{
+				strconv.Itoa(tagIDs[tagIdx1WithStudio]),
+			},
+			Modifier: models.CriterionModifierExcludes,
+		}
+
+		q := getSceneStringValue(studioIdxWithTwoTags, titleField)
+		findFilter := models.FindFilterType{
+			Q: &q,
+		}
+
+		studios = queryStudios(ctx, t, &studioFilter, &findFilter)
+		assert.Len(t, studios, 0)
+
+		return nil
+	})
+}
+
+func TestStudioQueryTagCount(t *testing.T) {
+	const tagCount = 1
+	tagCountCriterion := models.IntCriterionInput{
+		Value:    tagCount,
+		Modifier: models.CriterionModifierEquals,
+	}
+
+	verifyStudiosTagCount(t, tagCountCriterion)
+
+	tagCountCriterion.Modifier = models.CriterionModifierNotEquals
+	verifyStudiosTagCount(t, tagCountCriterion)
+
+	tagCountCriterion.Modifier = models.CriterionModifierGreaterThan
+	verifyStudiosTagCount(t, tagCountCriterion)
+
+	tagCountCriterion.Modifier = models.CriterionModifierLessThan
+	verifyStudiosTagCount(t, tagCountCriterion)
+}
+
+func verifyStudiosTagCount(t *testing.T, tagCountCriterion models.IntCriterionInput) {
+	withTxn(func(ctx context.Context) error {
+		sqb := db.Studio
+		studioFilter := models.StudioFilterType{
+			TagCount: &tagCountCriterion,
+		}
+
+		studios := queryStudios(ctx, t, &studioFilter, nil)
+		assert.Greater(t, len(studios), 0)
+
+		for _, studio := range studios {
+			ids, err := sqb.GetTagIDs(ctx, studio.ID)
+			if err != nil {
+				return err
+			}
+			verifyInt(t, len(ids), tagCountCriterion)
+		}
+
+		return nil
+	})
+}
+
 func verifyStudioQuery(t *testing.T, filter models.StudioFilterType, verifyFn func(ctx context.Context, s *models.Studio)) {
 	withTxn(func(ctx context.Context) error {
 		t.Helper()

pkg/sqlite/tables.go

@@ -34,6 +34,7 @@ var (
 	performersStashIDsJoinTable = goqu.T("performer_stash_ids")
 
 	studiosAliasesJoinTable  = goqu.T(studioAliasesTable)
+	studiosTagsJoinTable     = goqu.T(studiosTagsTable)
 	studiosStashIDsJoinTable = goqu.T("studio_stash_ids")
 
 	moviesURLsJoinTable = goqu.T(movieURLsTable)
@@ -294,6 +295,14 @@ var (
 		stringColumn: studiosAliasesJoinTable.Col(studioAliasColumn),
 	}
 
+	studiosTagsTableMgr = &joinTable{
+		table: table{
+			table:    studiosTagsJoinTable,
+			idColumn: studiosTagsJoinTable.Col(studioIDColumn),
+		},
+		fkColumn: studiosTagsJoinTable.Col(tagIDColumn),
+	}
+
 	studiosStashIDsTableMgr = &stashIDTable{
 		table: table{
 			table:    studiosStashIDsJoinTable,

pkg/sqlite/tag.go

@@ -448,6 +448,18 @@ func (qb *TagStore) FindBySceneMarkerID(ctx context.Context, sceneMarkerID int)
 	return qb.queryTags(ctx, query, args)
 }
 
+func (qb *TagStore) FindByStudioID(ctx context.Context, studioID int) ([]*models.Tag, error) {
+	query := `
+		SELECT tags.* FROM tags
+		LEFT JOIN studios_tags as studios_join on studios_join.tag_id = tags.id
+		WHERE studios_join.studio_id = ?
+		GROUP BY tags.id
+	`
+	query += qb.getDefaultTagSort()
+	args := []interface{}{studioID}
+	return qb.queryTags(ctx, query, args)
+}
+
 func (qb *TagStore) FindByName(ctx context.Context, name string, nocase bool) (*models.Tag, error) {
 	// query := "SELECT * FROM tags WHERE name = ?"
 	// if nocase {
@@ -628,6 +640,7 @@ var tagSortOptions = sortOptions{
 	"id",
 	"images_count",
 	"movies_count",
+	"studios_count",
 	"name",
 	"performers_count",
 	"random",
@@ -668,6 +681,8 @@ func (qb *TagStore) getTagSort(query *queryBuilder, findFilter *models.FindFilte
 		sortQuery += getCountSort(tagTable, galleriesTagsTable, tagIDColumn, direction)
 	case "performers_count":
 		sortQuery += getCountSort(tagTable, performersTagsTable, tagIDColumn, direction)
+	case "studios_count":
+		sortQuery += getCountSort(tagTable, studiosTagsTable, tagIDColumn, direction)
 	case "movies_count":
 		sortQuery += getCountSort(tagTable, moviesTagsTable, tagIDColumn, direction)
 	default:
@@ -767,6 +782,7 @@ func (qb *TagStore) Merge(ctx context.Context, source []int, destination int) er
 		galleriesTagsTable:   galleryIDColumn,
 		imagesTagsTable:      imageIDColumn,
 		"performers_tags":    "performer_id",
+		"studios_tags":       "studio_id",
 	}
 
 	args = append(args, destination)

pkg/sqlite/tag_filter.go

@@ -66,6 +66,7 @@ func (qb *tagFilterHandler) criterionHandler() criterionHandler {
 		qb.imageCountCriterionHandler(tagFilter.ImageCount),
 		qb.galleryCountCriterionHandler(tagFilter.GalleryCount),
 		qb.performerCountCriterionHandler(tagFilter.PerformerCount),
+		qb.studioCountCriterionHandler(tagFilter.StudioCount),
 		qb.movieCountCriterionHandler(tagFilter.MovieCount),
 		qb.markerCountCriterionHandler(tagFilter.MarkerCount),
 		qb.parentsCriterionHandler(tagFilter.Parents),
@@ -175,6 +176,17 @@ func (qb *tagFilterHandler) performerCountCriterionHandler(performerCount *model
 	}
 }
 
+func (qb *tagFilterHandler) studioCountCriterionHandler(studioCount *models.IntCriterionInput) criterionHandlerFunc {
+	return func(ctx context.Context, f *filterBuilder) {
+		if studioCount != nil {
+			f.addLeftJoin("studios_tags", "", "studios_tags.tag_id = tags.id")
+			clause, args := getIntCriterionWhereClause("count(distinct studios_tags.studio_id)", *studioCount)
+
+			f.addHaving(clause, args...)
+		}
+	}
+}
+
 func (qb *tagFilterHandler) movieCountCriterionHandler(movieCount *models.IntCriterionInput) criterionHandlerFunc {
 	return func(ctx context.Context, f *filterBuilder) {
 		if movieCount != nil {

pkg/sqlite/tag_test.go

@@ -230,6 +230,10 @@ func TestTagQuerySort(t *testing.T) {
 		tags = queryTags(ctx, t, sqb, nil, findFilter)
 		assert.Equal(tagIDs[tagIdx2WithPerformer], tags[0].ID)
 
+		sortBy = "studios_count"
+		tags = queryTags(ctx, t, sqb, nil, findFilter)
+		assert.Equal(tagIDs[tagIdx2WithStudio], tags[0].ID)
+
 		sortBy = "movies_count"
 		tags = queryTags(ctx, t, sqb, nil, findFilter)
 		assert.Equal(tagIDs[tagIdx1WithMovie], tags[0].ID)
@@ -569,6 +573,45 @@ func verifyTagPerformerCount(t *testing.T, imageCountCriterion models.IntCriteri
 	})
 }
 
+func TestTagQueryStudioCount(t *testing.T) {
+	countCriterion := models.IntCriterionInput{
+		Value:    1,
+		Modifier: models.CriterionModifierEquals,
+	}
+
+	verifyTagStudioCount(t, countCriterion)
+
+	countCriterion.Modifier = models.CriterionModifierNotEquals
+	verifyTagStudioCount(t, countCriterion)
+
+	countCriterion.Modifier = models.CriterionModifierLessThan
+	verifyTagStudioCount(t, countCriterion)
+
+	countCriterion.Value = 0
+	countCriterion.Modifier = models.CriterionModifierGreaterThan
+	verifyTagStudioCount(t, countCriterion)
+}
+
+func verifyTagStudioCount(t *testing.T, imageCountCriterion models.IntCriterionInput) {
+	withTxn(func(ctx context.Context) error {
+		qb := db.Tag
+		tagFilter := models.TagFilterType{
+			StudioCount: &imageCountCriterion,
+		}
+
+		tags, _, err := qb.Query(ctx, &tagFilter, nil)
+		if err != nil {
+			t.Errorf("Error querying tag: %s", err.Error())
+		}
+
+		for _, tag := range tags {
+			verifyInt(t, getTagStudioCount(tag.ID), imageCountCriterion)
+		}
+
+		return nil
+	})
+}
+
 func TestTagQueryParentCount(t *testing.T) {
 	countCriterion := models.IntCriterionInput{
 		Value:    1,
@@ -882,6 +925,9 @@ func TestTagMerge(t *testing.T) {
 			tagIdxWithPerformer,
 			tagIdx1WithPerformer,
 			tagIdx2WithPerformer,
+			tagIdxWithStudio,
+			tagIdx1WithStudio,
+			tagIdx2WithStudio,
 			tagIdxWithGallery,
 			tagIdx1WithGallery,
 			tagIdx2WithGallery,
@@ -970,6 +1016,14 @@ func TestTagMerge(t *testing.T) {
 
 		assert.Contains(performerTagIDs, destID)
 
+		// ensure studio points to new tag
+		studioTagIDs, err := db.Studio.GetTagIDs(ctx, studioIDs[studioIdxWithTwoTags])
+		if err != nil {
+			return err
+		}
+
+		assert.Contains(studioTagIDs, destID)
+
 		return nil
 	}); err != nil {
 		t.Error(err.Error())

pkg/studio/export_test.go

@@ -68,6 +68,7 @@ func createFullStudio(id int, parentID int) models.Studio {
 		Rating:        &rating,
 		IgnoreAutoTag: autoTagIgnored,
 		Aliases:       models.NewRelatedStrings(aliases),
+		TagIDs:        models.NewRelatedIDs([]int{}),
 		StashIDs:      models.NewRelatedStashIDs(stashIDs),
 	}
 
@@ -84,6 +85,7 @@ func createEmptyStudio(id int) models.Studio {
 		CreatedAt: createTime,
 		UpdatedAt: updateTime,
 		Aliases:   models.NewRelatedStrings([]string{}),
+		TagIDs:    models.NewRelatedIDs([]int{}),
 		StashIDs:  models.NewRelatedStashIDs([]models.StashID{}),
 	}
 }

pkg/studio/import.go

@@ -4,9 +4,11 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"strings"
 
 	"github.com/stashapp/stash/pkg/models"
 	"github.com/stashapp/stash/pkg/models/jsonschema"
+	"github.com/stashapp/stash/pkg/sliceutil"
 	"github.com/stashapp/stash/pkg/utils"
 )
 
@@ -19,6 +21,7 @@ var ErrParentStudioNotExist = errors.New("parent studio does not exist")
 
 type Importer struct {
 	ReaderWriter        ImporterReaderWriter
+	TagWriter           models.TagFinderCreator
 	Input               jsonschema.Studio
 	MissingRefBehaviour models.ImportMissingRefEnum
 
@@ -34,6 +37,10 @@ func (i *Importer) PreImport(ctx context.Context) error {
 		return err
 	}
 
+	if err := i.populateTags(ctx); err != nil {
+		return err
+	}
+
 	var err error
 	if len(i.Input.Image) > 0 {
 		i.imageData, err = utils.ProcessBase64Image(i.Input.Image)
@@ -45,6 +52,74 @@ func (i *Importer) PreImport(ctx context.Context) error {
 	return nil
 }
 
+func (i *Importer) populateTags(ctx context.Context) error {
+	if len(i.Input.Tags) > 0 {
+
+		tags, err := importTags(ctx, i.TagWriter, i.Input.Tags, i.MissingRefBehaviour)
+		if err != nil {
+			return err
+		}
+
+		for _, p := range tags {
+			i.studio.TagIDs.Add(p.ID)
+		}
+	}
+
+	return nil
+}
+
+func importTags(ctx context.Context, tagWriter models.TagFinderCreator, names []string, missingRefBehaviour models.ImportMissingRefEnum) ([]*models.Tag, error) {
+	tags, err := tagWriter.FindByNames(ctx, names, false)
+	if err != nil {
+		return nil, err
+	}
+
+	var pluckedNames []string
+	for _, tag := range tags {
+		pluckedNames = append(pluckedNames, tag.Name)
+	}
+
+	missingTags := sliceutil.Filter(names, func(name string) bool {
+		return !sliceutil.Contains(pluckedNames, name)
+	})
+
+	if len(missingTags) > 0 {
+		if missingRefBehaviour == models.ImportMissingRefEnumFail {
+			return nil, fmt.Errorf("tags [%s] not found", strings.Join(missingTags, ", "))
+		}
+
+		if missingRefBehaviour == models.ImportMissingRefEnumCreate {
+			createdTags, err := createTags(ctx, tagWriter, missingTags)
+			if err != nil {
+				return nil, fmt.Errorf("error creating tags: %v", err)
+			}
+
+			tags = append(tags, createdTags...)
+		}
+
+		// ignore if MissingRefBehaviour set to Ignore
+	}
+
+	return tags, nil
+}
+
+func createTags(ctx context.Context, tagWriter models.TagFinderCreator, names []string) ([]*models.Tag, error) {
+	var ret []*models.Tag
+	for _, name := range names {
+		newTag := models.NewTag()
+		newTag.Name = name
+
+		err := tagWriter.Create(ctx, &newTag)
+		if err != nil {
+			return nil, err
+		}
+
+		ret = append(ret, &newTag)
+	}
+
+	return ret, nil
+}
+
 func (i *Importer) populateParentStudio(ctx context.Context) error {
 	if i.Input.ParentStudio != "" {
 		studio, err := i.ReaderWriter.FindByName(ctx, i.Input.ParentStudio, false)
@@ -149,6 +224,7 @@ func studioJSONtoStudio(studioJSON jsonschema.Studio) models.Studio {
 		CreatedAt:     studioJSON.CreatedAt.GetTime(),
 		UpdatedAt:     studioJSON.UpdatedAt.GetTime(),
 
+		TagIDs:   models.NewRelatedIDs([]int{}),
 		StashIDs: models.NewRelatedStashIDs(studioJSON.StashIDs),
 	}
 

pkg/studio/import_test.go

@@ -16,13 +16,19 @@ const invalidImage = "aW1hZ2VCeXRlcw&&"
 
 const (
 	studioNameErr      = "studioNameErr"
-	existingStudioName = "existingTagName"
+	existingStudioName = "existingStudioName"
 
 	existingStudioID = 100
+	existingTagID    = 105
+	errTagsID        = 106
 
 	existingParentStudioName = "existingParentStudioName"
 	existingParentStudioErr  = "existingParentStudioErr"
 	missingParentStudioName  = "existingParentStudioName"
+
+	existingTagName = "existingTagName"
+	existingTagErr  = "existingTagErr"
+	missingTagName  = "missingTagName"
 )
 
 var testCtx = context.Background()
@@ -67,6 +73,97 @@ func TestImporterPreImport(t *testing.T) {
 	assert.Equal(t, expectedStudio, i.studio)
 }
 
+func TestImporterPreImportWithTag(t *testing.T) {
+	db := mocks.NewDatabase()
+
+	i := Importer{
+		ReaderWriter:        db.Studio,
+		TagWriter:           db.Tag,
+		MissingRefBehaviour: models.ImportMissingRefEnumFail,
+		Input: jsonschema.Studio{
+			Tags: []string{
+				existingTagName,
+			},
+		},
+	}
+
+	db.Tag.On("FindByNames", testCtx, []string{existingTagName}, false).Return([]*models.Tag{
+		{
+			ID:   existingTagID,
+			Name: existingTagName,
+		},
+	}, nil).Once()
+	db.Tag.On("FindByNames", testCtx, []string{existingTagErr}, false).Return(nil, errors.New("FindByNames error")).Once()
+
+	err := i.PreImport(testCtx)
+	assert.Nil(t, err)
+	assert.Equal(t, existingTagID, i.studio.TagIDs.List()[0])
+
+	i.Input.Tags = []string{existingTagErr}
+	err = i.PreImport(testCtx)
+	assert.NotNil(t, err)
+
+	db.AssertExpectations(t)
+}
+
+func TestImporterPreImportWithMissingTag(t *testing.T) {
+	db := mocks.NewDatabase()
+
+	i := Importer{
+		ReaderWriter: db.Studio,
+		TagWriter:    db.Tag,
+		Input: jsonschema.Studio{
+			Tags: []string{
+				missingTagName,
+			},
+		},
+		MissingRefBehaviour: models.ImportMissingRefEnumFail,
+	}
+
+	db.Tag.On("FindByNames", testCtx, []string{missingTagName}, false).Return(nil, nil).Times(3)
+	db.Tag.On("Create", testCtx, mock.AnythingOfType("*models.Tag")).Run(func(args mock.Arguments) {
+		t := args.Get(1).(*models.Tag)
+		t.ID = existingTagID
+	}).Return(nil)
+
+	err := i.PreImport(testCtx)
+	assert.NotNil(t, err)
+
+	i.MissingRefBehaviour = models.ImportMissingRefEnumIgnore
+	err = i.PreImport(testCtx)
+	assert.Nil(t, err)
+
+	i.MissingRefBehaviour = models.ImportMissingRefEnumCreate
+	err = i.PreImport(testCtx)
+	assert.Nil(t, err)
+	assert.Equal(t, existingTagID, i.studio.TagIDs.List()[0])
+
+	db.AssertExpectations(t)
+}
+
+func TestImporterPreImportWithMissingTagCreateErr(t *testing.T) {
+	db := mocks.NewDatabase()
+
+	i := Importer{
+		ReaderWriter: db.Studio,
+		TagWriter:    db.Tag,
+		Input: jsonschema.Studio{
+			Tags: []string{
+				missingTagName,
+			},
+		},
+		MissingRefBehaviour: models.ImportMissingRefEnumCreate,
+	}
+
+	db.Tag.On("FindByNames", testCtx, []string{missingTagName}, false).Return(nil, nil).Once()
+	db.Tag.On("Create", testCtx, mock.AnythingOfType("*models.Tag")).Return(errors.New("Create error"))
+
+	err := i.PreImport(testCtx)
+	assert.NotNil(t, err)
+
+	db.AssertExpectations(t)
+}
+
 func TestImporterPreImportWithParent(t *testing.T) {
 	db := mocks.NewDatabase()
 
@@ -156,6 +253,7 @@ func TestImporterPostImport(t *testing.T) {
 
 	i := Importer{
 		ReaderWriter: db.Studio,
+		TagWriter:    db.Tag,
 		Input: jsonschema.Studio{
 			Aliases: []string{"alias"},
 		},
@@ -181,6 +279,7 @@ func TestImporterFindExistingID(t *testing.T) {
 
 	i := Importer{
 		ReaderWriter: db.Studio,
+		TagWriter:    db.Tag,
 		Input: jsonschema.Studio{
 			Name: studioName,
 		},
@@ -223,6 +322,7 @@ func TestCreate(t *testing.T) {
 
 	i := Importer{
 		ReaderWriter: db.Studio,
+		TagWriter:    db.Tag,
 		studio:       studio,
 	}
 
@@ -258,6 +358,7 @@ func TestUpdate(t *testing.T) {
 
 	i := Importer{
 		ReaderWriter: db.Studio,
+		TagWriter:    db.Tag,
 		studio:       studio,
 	}
 

pkg/studio/query.go

@@ -2,6 +2,7 @@ package studio
 
 import (
 	"context"
+	"strconv"
 
 	"github.com/stashapp/stash/pkg/models"
 )
@@ -53,3 +54,15 @@ func ByAlias(ctx context.Context, qb models.StudioQueryer, alias string) (*model
 
 	return nil, nil
 }
+
+func CountByTagID(ctx context.Context, qb models.StudioQueryer, id int, depth *int) (int, error) {
+	filter := &models.StudioFilterType{
+		Tags: &models.HierarchicalMultiCriterionInput{
+			Value:    []string{strconv.Itoa(id)},
+			Modifier: models.CriterionModifierIncludes,
+			Depth:    depth,
+		},
+	}
+
+	return qb.QueryCount(ctx, filter, nil)
+}

ui/v2.5/graphql/data/studio-slim.graphql

@@ -12,4 +12,8 @@ fragment SlimStudioData on Studio {
   details
   rating100
   aliases
+  tags {
+    id
+    name
+  }
 }

ui/v2.5/graphql/data/studio.graphql

@@ -33,6 +33,9 @@ fragment StudioData on Studio {
   rating100
   favorite
   aliases
+  tags {
+    ...SlimTagData
+  }
 }
 
 fragment SelectStudioData on Studio {

ui/v2.5/graphql/data/tag.graphql

@@ -16,6 +16,8 @@ fragment TagData on Tag {
   gallery_count_all: gallery_count(depth: -1)
   performer_count
   performer_count_all: performer_count(depth: -1)
+  studio_count
+  studio_count_all: studio_count(depth: -1)
   movie_count
   movie_count_all: movie_count(depth: -1)
 

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

@@ -4,6 +4,7 @@ import {
   faImages,
   faPlayCircle,
   faUser,
+  faVideo,
   faMapMarkerAlt,
 } from "@fortawesome/free-solid-svg-icons";
 import React, { useMemo } from "react";
@@ -20,7 +21,8 @@ type PopoverLinkType =
   | "gallery"
   | "marker"
   | "movie"
-  | "performer";
+  | "performer"
+  | "studio";
 
 interface IProps {
   className?: string;
@@ -54,6 +56,8 @@ export const PopoverCountButton: React.FC<IProps> = ({
         return faFilm;
       case "performer":
         return faUser;
+      case "studio":
+        return faVideo;
     }
   }
 
@@ -89,6 +93,11 @@ export const PopoverCountButton: React.FC<IProps> = ({
           one: "performer",
           other: "performers",
         };
+      case "studio":
+        return {
+          one: "studio",
+          other: "studios",
+        };
     }
   }
 

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

@@ -191,7 +191,14 @@ export const GalleryLink: React.FC<IGalleryLinkProps> = ({
 
 interface ITagLinkProps {
   tag: INamedObject;
-  linkType?: "scene" | "gallery" | "image" | "details" | "performer" | "movie";
+  linkType?:
+    | "scene"
+    | "gallery"
+    | "image"
+    | "details"
+    | "performer"
+    | "movie"
+    | "studio";
   className?: string;
   hoverPlacement?: Placement;
   showHierarchyIcon?: boolean;
@@ -212,6 +219,8 @@ export const TagLink: React.FC<ITagLinkProps> = ({
         return NavUtils.makeTagScenesUrl(tag);
       case "performer":
         return NavUtils.makeTagPerformersUrl(tag);
+      case "studio":
+        return NavUtils.makeTagStudiosUrl(tag);
       case "gallery":
         return NavUtils.makeTagGalleriesUrl(tag);
       case "image":

ui/v2.5/src/components/Studios/StudioCard.tsx

@@ -6,13 +6,17 @@ import {
   GridCard,
   calculateCardWidth,
 } from "src/components/Shared/GridCard/GridCard";
-import { ButtonGroup } from "react-bootstrap";
+import { HoverPopover } from "../Shared/HoverPopover";
+import { Icon } from "../Shared/Icon";
+import { TagLink } from "../Shared/TagLink";
+import { Button, ButtonGroup } from "react-bootstrap";
 import { FormattedMessage } from "react-intl";
 import { PopoverCountButton } from "../Shared/PopoverCountButton";
 import { RatingBanner } from "../Shared/RatingBanner";
 import ScreenUtils from "src/utils/screen";
 import { FavoriteIcon } from "../Shared/FavoriteIcon";
 import { useStudioUpdate } from "src/core/StashService";
+import { faTag } from "@fortawesome/free-solid-svg-icons";
 
 interface IProps {
   studio: GQL.StudioDataFragment;
@@ -164,13 +168,31 @@ export const StudioCard: React.FC<IProps> = ({
     );
   }
 
+  function maybeRenderTagPopoverButton() {
+    if (studio.tags.length <= 0) return;
+
+    const popoverContent = studio.tags.map((tag) => (
+      <TagLink key={tag.id} linkType="studio" tag={tag} />
+    ));
+
+    return (
+      <HoverPopover placement="bottom" content={popoverContent}>
+        <Button className="minimal tag-count">
+          <Icon icon={faTag} />
+          <span>{studio.tags.length}</span>
+        </Button>
+      </HoverPopover>
+    );
+  }
+
   function maybeRenderPopoverButtonGroup() {
     if (
       studio.scene_count ||
       studio.image_count ||
       studio.gallery_count ||
       studio.movie_count ||
-      studio.performer_count
+      studio.performer_count ||
+      studio.tags.length > 0
     ) {
       return (
         <>
@@ -181,6 +203,7 @@ export const StudioCard: React.FC<IProps> = ({
             {maybeRenderImagesPopoverButton()}
             {maybeRenderGalleriesPopoverButton()}
             {maybeRenderPerformersPopoverButton()}
+            {maybeRenderTagPopoverButton()}
           </ButtonGroup>
         </>
       );

ui/v2.5/src/components/Studios/StudioDetails/StudioDetailsPanel.tsx

@@ -1,4 +1,5 @@
 import React from "react";
+import { TagLink } from "src/components/Shared/TagLink";
 import * as GQL from "src/core/generated-graphql";
 import { DetailItem } from "src/components/Shared/DetailItem";
 import { StashIDPill } from "src/components/Shared/StashID";
@@ -15,6 +16,19 @@ export const StudioDetailsPanel: React.FC<IStudioDetailsPanel> = ({
   collapsed,
   fullWidth,
 }) => {
+  function renderTagsField() {
+    if (!studio.tags.length) {
+      return;
+    }
+    return (
+      <ul className="pl-0">
+        {(studio.tags ?? []).map((tag) => (
+          <TagLink key={tag.id} linkType="studio" tag={tag} />
+        ))}
+      </ul>
+    );
+  }
+
   function renderStashIDs() {
     if (!studio.stash_ids?.length) {
       return;
@@ -36,11 +50,18 @@ export const StudioDetailsPanel: React.FC<IStudioDetailsPanel> = ({
   function maybeRenderExtraDetails() {
     if (!collapsed) {
       return (
+        <>
+          <DetailItem
+            id="tags"
+            value={renderTagsField()}
+            fullWidth={fullWidth}
+          />
           <DetailItem
             id="stash_ids"
             value={renderStashIDs()}
             fullWidth={fullWidth}
           />
+        </>
       );
     }
   }

ui/v2.5/src/components/Studios/StudioDetails/StudioEditPanel.tsx

@@ -16,6 +16,7 @@ import { handleUnsavedChanges } from "src/utils/navigation";
 import { formikUtils } from "src/utils/form";
 import { yupFormikValidate, yupUniqueAliases } from "src/utils/yup";
 import { Studio, StudioSelect } from "../StudioSelect";
+import { useTagsEdit } from "src/hooks/tagsEdit";
 
 interface IStudioEditPanel {
   studio: Partial<GQL.StudioDataFragment>;
@@ -50,6 +51,7 @@ export const StudioEditPanel: React.FC<IStudioEditPanel> = ({
     details: yup.string().ensure(),
     parent_id: yup.string().required().nullable(),
     aliases: yupUniqueAliases(intl, "name"),
+    tag_ids: yup.array(yup.string().required()).defined(),
     ignore_auto_tag: yup.boolean().defined(),
     stash_ids: yup.mixed<GQL.StashIdInput[]>().defined(),
     image: yup.string().nullable().optional(),
@@ -62,6 +64,7 @@ export const StudioEditPanel: React.FC<IStudioEditPanel> = ({
     details: studio.details ?? "",
     parent_id: studio.parent_studio?.id ?? null,
     aliases: studio.aliases ?? [],
+    tag_ids: (studio.tags ?? []).map((t) => t.id),
     ignore_auto_tag: studio.ignore_auto_tag ?? false,
     stash_ids: getStashIDs(studio.stash_ids),
   };
@@ -75,6 +78,10 @@ export const StudioEditPanel: React.FC<IStudioEditPanel> = ({
     onSubmit: (values) => onSave(schema.cast(values)),
   });
 
+  const { tagsControl } = useTagsEdit(studio.tags, (ids) =>
+    formik.setFieldValue("tag_ids", ids)
+  );
+
   function onSetParentStudio(item: Studio | null) {
     setParentStudio(item);
     formik.setFieldValue("parent_id", item ? item.id : null);
@@ -157,6 +164,11 @@ export const StudioEditPanel: React.FC<IStudioEditPanel> = ({
     return renderField("parent_id", title, control);
   }
 
+  function renderTagsField() {
+    const title = intl.formatMessage({ id: "tags" });
+    return renderField("tag_ids", title, tagsControl());
+  }
+
   if (isLoading) return <LoadingIndicator />;
 
   return (
@@ -178,6 +190,7 @@ export const StudioEditPanel: React.FC<IStudioEditPanel> = ({
         {renderInputField("url")}
         {renderInputField("details", "textarea")}
         {renderParentStudioField()}
+        {renderTagsField()}
         {renderStashIDsField("stash_ids", "studios")}
         <hr />
         {renderInputField("ignore_auto_tag", "checkbox")}

ui/v2.5/src/components/Tags/TagCard.tsx

@@ -223,6 +223,19 @@ export const TagCard: React.FC<IProps> = ({
     );
   }
 
+  function maybeRenderStudiosPopoverButton() {
+    if (!tag.studio_count) return;
+
+    return (
+      <PopoverCountButton
+        className="studio-count"
+        type="studio"
+        count={tag.studio_count}
+        url={NavUtils.makeTagStudiosUrl(tag)}
+      />
+    );
+  }
+
   function maybeRenderMoviesPopoverButton() {
     if (!tag.movie_count) return;
 
@@ -248,6 +261,7 @@ export const TagCard: React.FC<IProps> = ({
             {maybeRenderMoviesPopoverButton()}
             {maybeRenderSceneMarkersPopoverButton()}
             {maybeRenderPerformersPopoverButton()}
+            {maybeRenderStudiosPopoverButton()}
           </ButtonGroup>
         </>
       );

ui/v2.5/src/components/Tags/TagDetails/Tag.tsx

@@ -26,6 +26,7 @@ import { TagScenesPanel } from "./TagScenesPanel";
 import { TagMarkersPanel } from "./TagMarkersPanel";
 import { TagImagesPanel } from "./TagImagesPanel";
 import { TagPerformersPanel } from "./TagPerformersPanel";
+import { TagStudiosPanel } from "./TagStudiosPanel";
 import { TagGalleriesPanel } from "./TagGalleriesPanel";
 import { CompressedTagDetailsPanel, TagDetailsPanel } from "./TagDetailsPanel";
 import { TagEditPanel } from "./TagEditPanel";
@@ -61,6 +62,7 @@ const validTabs = [
   "movies",
   "markers",
   "performers",
+  "studios",
 ] as const;
 type TabKey = (typeof validTabs)[number];
 
@@ -109,6 +111,8 @@ const TagPage: React.FC<IProps> = ({ tag, tabKey }) => {
     (showAllCounts ? tag.scene_marker_count_all : tag.scene_marker_count) ?? 0;
   const performerCount =
     (showAllCounts ? tag.performer_count_all : tag.performer_count) ?? 0;
+  const studioCount =
+    (showAllCounts ? tag.studio_count_all : tag.studio_count) ?? 0;
 
   const populatedDefaultTab = useMemo(() => {
     let ret: TabKey = "scenes";
@@ -123,6 +127,8 @@ const TagPage: React.FC<IProps> = ({ tag, tabKey }) => {
         ret = "markers";
       } else if (performerCount != 0) {
         ret = "performers";
+      } else if (studioCount != 0) {
+        ret = "studios";
       }
     }
 
@@ -133,6 +139,7 @@ const TagPage: React.FC<IProps> = ({ tag, tabKey }) => {
     galleryCount,
     sceneMarkerCount,
     performerCount,
+    studioCount,
     movieCount,
   ]);
 
@@ -521,6 +528,21 @@ const TagPage: React.FC<IProps> = ({ tag, tabKey }) => {
       >
         <TagPerformersPanel active={tabKey === "performers"} tag={tag} />
       </Tab>
+      <Tab
+        eventKey="studios"
+        title={
+          <>
+            {intl.formatMessage({ id: "studios" })}
+            <Counter
+              abbreviateCounter={abbreviateCounter}
+              count={studioCount}
+              hideZero
+            />
+          </>
+        }
+      >
+        <TagStudiosPanel active={tabKey === "studios"} tag={tag} />
+      </Tab>
     </Tabs>
   );
 

ui/v2.5/src/components/Tags/TagDetails/TagStudiosPanel.tsx

@@ -0,0 +1,17 @@
+import React from "react";
+import * as GQL from "src/core/generated-graphql";
+import { useTagFilterHook } from "src/core/tags";
+import { StudioList } from "src/components/Studios/StudioList";
+
+interface ITagStudiosPanel {
+  active: boolean;
+  tag: GQL.TagDataFragment;
+}
+
+export const TagStudiosPanel: React.FC<ITagStudiosPanel> = ({
+  active,
+  tag,
+}) => {
+  const filterHook = useTagFilterHook(tag);
+  return <StudioList filterHook={filterHook} alterQuery={active} />;
+};

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

@@ -1376,6 +1376,7 @@
   "status": "Status: {statusText}",
   "studio": "Studio",
   "studio_and_parent": "Studio & Parent",
+  "studio_count": "Studio Count",
   "studio_depth": "Levels (empty for all)",
   "studio_tagger": {
     "add_new_studios": "Add New Studios",
@@ -1415,6 +1416,7 @@
     "update_studios": "Update Studios",
     "updating_untagged_studios_description": "Updating untagged studios will try to match any studios that lack a stashid and update the metadata."
   },
+  "studio_tags": "Studio Tags",
   "studios": "Studios",
   "sub_tag_count": "Sub-Tag Count",
   "sub_tag_of": "Sub-tag of {parent}",

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

@@ -55,6 +55,13 @@ export const PerformerTagsCriterionOption = new BaseTagsCriterionOption(
   withoutEqualsModifierOptions
 );
 
+// TODO - this requires using a nested studios_filter which needs to be added separately
+// export const StudioTagsCriterionOption = new BaseTagsCriterionOption(
+//   "studio_tags",
+//   "studio_tags",
+//   withoutEqualsModifierOptions
+// );
+
 export const ParentTagsCriterionOption = new BaseTagsCriterionOption(
   "parent_tags",
   "parents",

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

@@ -14,6 +14,7 @@ import { ScenesCriterionOption } from "./criteria/scenes";
 import { StudiosCriterionOption } from "./criteria/studios";
 import {
   PerformerTagsCriterionOption,
+  // StudioTagsCriterionOption,
   TagsCriterionOption,
 } from "./criteria/tags";
 import { ListFilterOptions, MediaSortByOptions } from "./filter-options";
@@ -62,6 +63,7 @@ const criterionOptions = [
   createMandatoryNumberCriterionOption("performer_age"),
   PerformerFavoriteCriterionOption,
   createMandatoryNumberCriterionOption("image_count"),
+  // StudioTagsCriterionOption,
   ScenesCriterionOption,
   StudiosCriterionOption,
   createStringCriterionOption("url"),

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

@@ -16,6 +16,7 @@ import { OrientationCriterionOption } from "./criteria/orientation";
 import { StudiosCriterionOption } from "./criteria/studios";
 import {
   PerformerTagsCriterionOption,
+  // StudioTagsCriterionOption,
   TagsCriterionOption,
 } from "./criteria/tags";
 import { ListFilterOptions, MediaSortByOptions } from "./filter-options";
@@ -54,6 +55,7 @@ const criterionOptions = [
   createMandatoryNumberCriterionOption("performer_count"),
   createMandatoryNumberCriterionOption("performer_age"),
   PerformerFavoriteCriterionOption,
+  // StudioTagsCriterionOption,
   StudiosCriterionOption,
   createStringCriterionOption("url"),
   createDateCriterionOption("date"),

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

@@ -11,6 +11,7 @@ import { PerformersCriterionOption } from "./criteria/performers";
 import { ListFilterOptions } from "./filter-options";
 import { DisplayMode } from "./types";
 import { RatingCriterionOption } from "./criteria/rating";
+// import { StudioTagsCriterionOption } from "./criteria/tags";
 import { TagsCriterionOption } from "./criteria/tags";
 
 const defaultSortBy = "name";
@@ -32,6 +33,7 @@ const sortByOptions = [
   ]);
 const displayModeOptions = [DisplayMode.Grid];
 const criterionOptions = [
+  // StudioTagsCriterionOption,
   StudiosCriterionOption,
   MovieIsMissingCriterionOption,
   createStringCriterionOption("url"),

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

@@ -17,6 +17,7 @@ import { StudiosCriterionOption } from "./criteria/studios";
 import { InteractiveCriterionOption } from "./criteria/interactive";
 import {
   PerformerTagsCriterionOption,
+  // StudioTagsCriterionOption,
   TagsCriterionOption,
 } from "./criteria/tags";
 import { ListFilterOptions, MediaSortByOptions } from "./filter-options";
@@ -99,6 +100,7 @@ const criterionOptions = [
   createMandatoryNumberCriterionOption("performer_count"),
   createMandatoryNumberCriterionOption("performer_age"),
   PerformerFavoriteCriterionOption,
+  // StudioTagsCriterionOption,
   StudiosCriterionOption,
   MoviesCriterionOption,
   GalleriesCriterionOption,

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

@@ -10,11 +10,12 @@ import { StudioIsMissingCriterionOption } from "./criteria/is-missing";
 import { RatingCriterionOption } from "./criteria/rating";
 import { StashIDCriterionOption } from "./criteria/stash-ids";
 import { ParentStudiosCriterionOption } from "./criteria/studios";
+import { TagsCriterionOption } from "./criteria/tags";
 import { ListFilterOptions } from "./filter-options";
 import { DisplayMode } from "./types";
 
 const defaultSortBy = "name";
-const sortByOptions = ["name", "random", "rating"]
+const sortByOptions = ["name", "tag_count", "random", "rating"]
   .map(ListFilterOptions.createSortBy)
   .concat([
     {
@@ -42,8 +43,10 @@ const criterionOptions = [
   createStringCriterionOption("details"),
   ParentStudiosCriterionOption,
   StudioIsMissingCriterionOption,
+  TagsCriterionOption,
   RatingCriterionOption,
   createBooleanCriterionOption("ignore_auto_tag"),
+  createMandatoryNumberCriterionOption("tag_count"),
   createMandatoryNumberCriterionOption("scene_count"),
   createMandatoryNumberCriterionOption("image_count"),
   createMandatoryNumberCriterionOption("gallery_count"),

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

@@ -43,6 +43,10 @@ const sortByOptions = ["name", "random"]
       messageID: "marker_count",
       value: "scene_markers_count",
     },
+    {
+      messageID: "studio_count",
+      value: "studios_count",
+    },
   ]);
 
 const displayModeOptions = [DisplayMode.Grid, DisplayMode.List];
@@ -57,6 +61,7 @@ const criterionOptions = [
   createMandatoryNumberCriterionOption("image_count"),
   createMandatoryNumberCriterionOption("gallery_count"),
   createMandatoryNumberCriterionOption("performer_count"),
+  createMandatoryNumberCriterionOption("studio_count"),
   createMandatoryNumberCriterionOption("movie_count"),
   createMandatoryNumberCriterionOption("marker_count"),
   ParentTagsCriterionOption,

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

@@ -142,6 +142,7 @@ export type CriterionType =
   | "tags"
   | "scene_tags"
   | "performer_tags"
+  | "studio_tags"
   | "tag_count"
   | "performers"
   | "studios"
@@ -172,6 +173,7 @@ export type CriterionType =
   | "image_count"
   | "gallery_count"
   | "performer_count"
+  | "studio_count"
   | "movie_count"
   | "death_year"
   | "url"

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

@@ -263,7 +263,7 @@ const makeChildTagsUrl = (tag: Partial<GQL.TagDataFragment>) => {
 };
 
 function makeTagFilter(mode: GQL.FilterMode, tag: INamedObject) {
-  const filter = new ListFilterModel(GQL.FilterMode.Scenes, undefined);
+  const filter = new ListFilterModel(mode, undefined);
   const criterion = new TagsCriterion(TagsCriterionOption);
   criterion.value = {
     items: [{ id: tag.id, label: tag.name || `Tag ${tag.id}` }],
@@ -282,6 +282,10 @@ const makeTagPerformersUrl = (tag: INamedObject) => {
   return `/performers?${makeTagFilter(GQL.FilterMode.Performers, tag)}`;
 };
 
+const makeTagStudiosUrl = (tag: INamedObject) => {
+  return `/studios?${makeTagFilter(GQL.FilterMode.Studios, tag)}`;
+};
+
 const makeTagSceneMarkersUrl = (tag: INamedObject) => {
   return `/scenes/markers?${makeTagFilter(GQL.FilterMode.SceneMarkers, tag)}`;
 };
@@ -410,6 +414,7 @@ const NavUtils = {
   makeTagSceneMarkersUrl,
   makeTagScenesUrl,
   makeTagPerformersUrl,
+  makeTagStudiosUrl,
   makeTagGalleriesUrl,
   makeTagImagesUrl,
   makeTagMoviesUrl,