Add studios_filter to TagFilterType

graphql/schema/types/filters.graphql

@@ -644,6 +644,8 @@ input TagFilterType {
   galleries_filter: GalleryFilterType
   "Filter by related performers that meet this criteria"
   performers_filter: PerformerFilterType
+  "Filter by related studios that meet this criteria"
+  studios_filter: StudioFilterType
 
   "Filter by creation time"
   created_at: TimestampCriterionInput

pkg/models/tag.go

@@ -52,6 +52,8 @@ type TagFilterType struct {
 	GalleriesFilter *GalleryFilterType `json:"galleries_filter"`
 	// Filter by related performers that meet this criteria
 	PerformersFilter *PerformerFilterType `json:"performers_filter"`
+	// Filter by related studios that meet this criteria
+	StudiosFilter *StudioFilterType `json:"studios_filter"`
 	// Filter by created at
 	CreatedAt *TimestampCriterionInput `json:"created_at"`
 	// Filter by updated at

pkg/sqlite/tag.go

@@ -108,6 +108,7 @@ type tagRepositoryType struct {
 	images     joinRepository
 	galleries  joinRepository
 	performers joinRepository
+	studios    joinRepository
 }
 
 var (
@@ -161,6 +162,14 @@ var (
 			fkColumn:     performerIDColumn,
 			foreignTable: performerTable,
 		},
+		studios: joinRepository{
+			repository: repository{
+				tableName: studiosTagsTable,
+				idColumn:  tagIDColumn,
+			},
+			fkColumn:     studioIDColumn,
+			foreignTable: studioTable,
+		},
 	}
 )
 

pkg/sqlite/tag_filter.go

@@ -136,6 +136,15 @@ func (qb *tagFilterHandler) criterionHandler() criterionHandler {
 				tagRepository.performers.innerJoin(f, "", "tags.id")
 			},
 		},
+
+		&relatedFilterHandler{
+			relatedIDCol:   "studios_tags.studio_id",
+			relatedRepo:    studioRepository.repository,
+			relatedHandler: &studioFilterHandler{tagFilter.StudiosFilter},
+			joinFn: func(f *filterBuilder) {
+				tagRepository.studios.innerJoin(f, "", "tags.id")
+			},
+		},
 	}
 }