base.py 文件源码

def __getstate__(self):
        """
        Need for pickling queryset

        See https://github.com/MongoEngine/mongoengine/issues/442
        """

        obj_dict = self.__dict__.copy()

        # don't picke collection, instead pickle collection params
        obj_dict.pop('_collection_obj')

        # don't pickle cursor
        obj_dict['_cursor_obj'] = None

        return obj_dict