Handle missing studio ids in getHierarchicalValues (#3845)

pkg/sqlite/filter.go

@@ -2,6 +2,7 @@ package sqlite
 
 import (
 	"context"
+	"database/sql"
 	"errors"
 	"fmt"
 	"path/filepath"
@@ -950,13 +951,21 @@ WHERE id in {inBinding}
 
 	query := fmt.Sprintf("WITH RECURSIVE %s SELECT 'VALUES' || GROUP_CONCAT('(' || root_id || ', ' || item_id || ')') AS val FROM items", withClause)
 
-	var valuesClause string
+	var valuesClause sql.NullString
 	err := tx.Get(ctx, &valuesClause, query, args...)
 	if err != nil {
 		return "", fmt.Errorf("failed to get hierarchical values: %w", err)
 	}
 
-	return valuesClause, nil
+	// if no values are found, just return a values string with the values only
+	if !valuesClause.Valid {
+		for i, value := range values {
+			values[i] = fmt.Sprintf("(%s, %s)", value, value)
+		}
+		valuesClause.String = "VALUES" + strings.Join(values, ",")
+	}
+
+	return valuesClause.String, nil
 }
 
 func addHierarchicalConditionClauses(f *filterBuilder, criterion models.HierarchicalMultiCriterionInput, table, idColumn string) {

pkg/sqlite/scene_test.go

@@ -2116,6 +2116,8 @@ func TestSceneQuery(t *testing.T) {
 	var (
 		endpoint = sceneStashID(sceneIdxWithGallery).Endpoint
 		stashID  = sceneStashID(sceneIdxWithGallery).StashID
+
+		depth = -1
 	)
 
 	tests := []struct {
@@ -2219,6 +2221,20 @@ func TestSceneQuery(t *testing.T) {
 			nil,
 			false,
 		},
+		{
+			"with studio id 0 including child studios",
+			nil,
+			&models.SceneFilterType{
+				Studios: &models.HierarchicalMultiCriterionInput{
+					Value:    []string{"0"},
+					Modifier: models.CriterionModifierIncludes,
+					Depth:    &depth,
+				},
+			},
+			nil,
+			nil,
+			false,
+		},
 	}
 
 	for _, tt := range tests {