def get(self, object_id):
        """
        根据 objectId 查询。

        :param object_id: 要查询对象的 objectId
        :return: 查询结果
        :rtype: Object
        """
        if not object_id:
            raise LeanCloudError(code=101, error='Object not found.')
        obj = self._query_class.create_without_data(object_id)
        obj.fetch(select=self._select, include=self._include)
        return obj