- self._cache.update(dict([(a.key, getattr(values_bulk[a.value_content_type].get(a.value_object_id), 'value', None)) for a in attributes]))
+ self._cache.update(dict([(a.key, getattr(values_bulk[a.value_content_type_id].get(a.value_object_id), 'value', None)) for a in attributes]))