Add is-missing tags filter (#526)

pkg/models/querybuilder_scene.go

@@ -317,6 +317,8 @@ func (qb *SceneQueryBuilder) Query(sceneFilter *SceneFilterType, findFilter *Fin
 			whereClauses = append(whereClauses, "performers_join.scene_id IS NULL")
 		case "date":
 			whereClauses = append(whereClauses, "scenes.date IS \"\" OR scenes.date IS \"0001-01-01\"")
+		case "tags":
+			whereClauses = append(whereClauses, "tags_join.scene_id IS NULL")
 		default:
 			whereClauses = append(whereClauses, "scenes."+*isMissingFilter+" IS NULL")
 		}

pkg/models/querybuilder_scene_test.go

@@ -497,6 +497,28 @@ func TestSceneQueryIsMissingDate(t *testing.T) {
 	}
 }
 
+func TestSceneQueryIsMissingTags(t *testing.T) {
+	sqb := models.NewSceneQueryBuilder()
+	isMissing := "tags"
+	sceneFilter := models.SceneFilterType{
+		IsMissing: &isMissing,
+	}
+
+	q := getSceneStringValue(sceneIdxWithTwoTags, titleField)
+	findFilter := models.FindFilterType{
+		Q: &q,
+	}
+
+	scenes, _ := sqb.Query(&sceneFilter, &findFilter)
+
+	assert.Len(t, scenes, 0)
+
+	findFilter.Q = nil
+	scenes, _ = sqb.Query(&sceneFilter, &findFilter)
+
+	assert.True(t, len(scenes) > 0)
+}
+
 func TestSceneQueryIsMissingRating(t *testing.T) {
 	sqb := models.NewSceneQueryBuilder()
 	isMissing := "rating"

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

@@ -18,6 +18,7 @@ export class SceneIsMissingCriterion extends IsMissingCriterion {
     "studio",
     "movie",
     "performers",
+    "tags",
   ];
 }