Ticket #1796: ManyToMany.patch

query.py

@@ -713 +713 @@
     if related_query:
         matches = [f for f in field_list if f.field.related_query_name() == name]
     else:
-        matches = [f for f in field_list if f.name == name]
+        matches = [f for f in field_list if f.name == name or 
+                hasattr(f, "related_query_name") and f.related_query_name() == name]
     if len(matches) != 1:
         return None
     return matches[0]