Ticket #3938: 0.91-onetoone-admin-changelist-fix.patch

django/core/meta/__init__.py

@@ -1734 +1734 @@
                 # Sanity check -- Make sure the "parent" object exists.
                 # For example, make sure the Place exists for the Restaurant.
                 # Let the ObjectDoesNotExist exception propagate up.
-                lookup_kwargs = opts.one_to_one_field.rel.limit_choices_to
+                lookup_kwargs = opts.one_to_one_field.rel.limit_choices_to.copy()
                 lookup_kwargs['%s__exact' % opts.one_to_one_field.rel.field_name] = obj_key
                 _ = opts.one_to_one_field.rel.to.get_model_module().get_object(**lookup_kwargs)
                 params = dict([(f.attname, f.get_default()) for f in opts.fields])