Handle edge case of user having no allowed objects at all when searching correctly

aleksis/core/schema/__init__.py

@@ -121,12 +121,14 @@ class Query(graphene.ObjectType):
     def resolve_search_snippets(root, info, query, limit=-1, **kwargs):
         indexed_models = UnifiedIndex().get_indexed_models()
         allowed_object_ids = get_allowed_object_ids(info.context.user, indexed_models)
-        results = SearchQuerySet().filter(id__in=allowed_object_ids).filter(text=AutoQuery(query))
 
-        if limit < 0:
-            return results
-
-        return results[:limit]
+        if allowed_object_ids:
+            results = SearchQuerySet().filter(id__in=allowed_object_ids).filter(text=AutoQuery(query))
+            if limit < 0:
+                return results
+            return results[:limit]
+        else:
+            return None
 
     def resolve_messages(root, info, **kwargs):
         return get_messages(info)