json.py 文件源码

def _make_encoder(superclass):
    class MongoEngineJSONEncoder(superclass):
        """
        A JSONEncoder which provides serialization of MongoEngine
        documents and queryset objects.
        """
        def default(self, obj):
            if isinstance(obj, BaseDocument):
                return json_util._json_convert(obj.to_mongo())
            elif isinstance(obj, QuerySet):
                return json_util._json_convert(obj.as_pymongo())
            return superclass.default(self, obj)
    return MongoEngineJSONEncoder