def post_save(self, obj, data, create_new=True): super(ExtraMixinItemsInventory, self).post_save(obj, data, create_new) if 'items' in data: try: InventoryService.sync_from_json(obj, data['items']) except InventoryService.InventoryServiceException as exc: raise BaseCanoniseResource.CanonException(unicode(exc))