Fixed deletion of motions with change recommendations. Fixed #4415.

openslides/utils/autoupdate.py

@@ -225,7 +225,12 @@ def handle_changed_elements(elements: Iterable[Element]) -> None:
         for element in elements:
             if element.get("reload"):
                 model = get_model_from_collection_string(element["collection_string"])
+                try:
                     instance = model.objects.get(pk=element["id"])
+                except model.DoesNotExist:
+                    # The instance was deleted so we set full_data explicitly to None.
+                    element["full_data"] = None
+                else:
                     element["full_data"] = instance.get_full_data()
 
         # Save histroy here using sync code.

openslides/utils/models.py

@@ -176,7 +176,7 @@ def CASCADE_AND_AUTOUODATE(
     collector: Any, field: Any, sub_objs: Any, using: Any
 ) -> None:
     """
-    Like models.SET_NULL but also informs the autoupdate system about the
+    Like models.CASCADE but also informs the autoupdate system about the
     root rest element of the also deleted instance.
     """
     if len(sub_objs) != 1: