Fix possible NoneType is not iterable error

Muster-Suchen-und-Erkennen · Jan 24, 2024 · 2aad678 · 2aad678
1 parent eb3e903
commit 2aad678
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/muse_for_music/models/helper_classes.py b/muse_for_music/models/helper_classes.py
@@ -225,10 +225,14 @@ def _update_updateable_model_list(self, item_list: Sequence[dict],
         if to_delete:
             db.session.expire(self)
 
-    def update_list(self, item_list: Union[Sequence[int], Sequence[dict]],
+    def update_list(self, item_list: Union[Sequence[int], Sequence[dict], None],
                     old_items: Union[Dict[int, K], Dict[int, W]], mapping_cls: Any,
                     item_cls: Type[V] = None, mapping_cls_attribute: str = None):
 
+        # consider None an empty list
+        if item_list is None:
+            item_list = tuple()
+
         if issubclass(mapping_cls, UpdateableModelMixin):
             self._update_updateable_model_list(item_list, old_items, mapping_cls)
         elif issubclass(item_cls, GetByID) and item_cls is not None and mapping_cls_attribute: