Ticket #14325: fix_genericforeignkey_comparison.diff

django/contrib/contenttypes/generic.py

@@ -49 +49 @@
         # Convenience function using get_model avoids a circular import when
         # using this model
         ContentType = get_model("contenttypes", "contenttype")
-        if obj:
+        if obj is not None:
              return ContentType.objects.db_manager(obj._state.db).get_for_model(obj)
-        elif id:
+        elif id is not None:
              return ContentType.objects.db_manager(using).get_for_id(id)
         else:
             # This should never happen. I love comments like this, don't you?