fix(api): return proper HTTP 204 status code in DELETE endpoints (#32012)

Signed-off-by: NeatGuyCoding <15627489+NeatGuyCoding@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/controllers/console/tag/tags.py

@@ -120,7 +120,7 @@ class TagUpdateDeleteApi(Resource):
 
         TagService.delete_tag(tag_id)
 
-        return 204
+        return "", 204
 
 
 @console_ns.route("/tag-bindings/create")

api/controllers/service_api/dataset/dataset.py

@@ -396,7 +396,7 @@ class DatasetApi(DatasetApiResource):
         try:
             if DatasetService.delete_dataset(dataset_id_str, current_user):
                 DatasetPermissionService.clear_partial_member_list(dataset_id_str)
-                return 204
+                return "", 204
             else:
                 raise NotFound("Dataset not found.")
         except services.errors.dataset.DatasetInUseError:
@@ -557,7 +557,7 @@ class DatasetTagsApi(DatasetApiResource):
         payload = TagDeletePayload.model_validate(service_api_ns.payload or {})
         TagService.delete_tag(payload.tag_id)
 
-        return 204
+        return "", 204
 
 
 @service_api_ns.route("/datasets/tags/binding")
@@ -581,7 +581,7 @@ class DatasetTagBindingApi(DatasetApiResource):
         payload = TagBindingPayload.model_validate(service_api_ns.payload or {})
         TagService.save_tag_binding({"tag_ids": payload.tag_ids, "target_id": payload.target_id, "type": "knowledge"})
 
-        return 204
+        return "", 204
 
 
 @service_api_ns.route("/datasets/tags/unbinding")
@@ -605,7 +605,7 @@ class DatasetTagUnbindingApi(DatasetApiResource):
         payload = TagUnbindingPayload.model_validate(service_api_ns.payload or {})
         TagService.delete_tag_binding({"tag_id": payload.tag_id, "target_id": payload.target_id, "type": "knowledge"})
 
-        return 204
+        return "", 204
 
 
 @service_api_ns.route("/datasets/<uuid:dataset_id>/tags")

api/controllers/service_api/dataset/document.py

@@ -746,4 +746,4 @@ class DocumentApi(DatasetApiResource):
         except services.errors.document.DocumentIndexingError:
             raise DocumentIndexingError("Cannot delete document during indexing.")
 
-        return 204
+        return "", 204

api/controllers/service_api/dataset/metadata.py

@@ -128,7 +128,7 @@ class DatasetMetadataServiceApi(DatasetApiResource):
         DatasetService.check_dataset_permission(dataset, current_user)
 
         MetadataService.delete_metadata(dataset_id_str, metadata_id_str)
-        return 204
+        return "", 204
 
 
 @service_api_ns.route("/datasets/<uuid:dataset_id>/metadata/built-in")

api/controllers/service_api/dataset/segment.py

@@ -233,7 +233,7 @@ class DatasetSegmentApi(DatasetApiResource):
         if not segment:
             raise NotFound("Segment not found.")
         SegmentService.delete_segment(segment, document, dataset)
-        return 204
+        return "", 204
 
     @service_api_ns.expect(service_api_ns.models[SegmentUpdatePayload.__name__])
     @service_api_ns.doc("update_segment")
@@ -499,7 +499,7 @@ class DatasetChildChunkApi(DatasetApiResource):
         except ChildChunkDeleteIndexServiceError as e:
             raise ChildChunkDeleteIndexError(str(e))
 
-        return 204
+        return "", 204
 
     @service_api_ns.expect(service_api_ns.models[ChildChunkUpdatePayload.__name__])
     @service_api_ns.doc("update_child_chunk")