model_base.py 文件源码

def from_json(self, request_data):
        """
        Update entity with new data from json.

        check for data to transform, if needed, perform operations and assign values to respective properties in entity.
        :param request_data:
        :return:
        """
        for property, value in request_data.iteritems():
            prop_type = self._properties.get(property)
            if prop_type:
                prop_value = value
                if isinstance(prop_type, (ndb.DateProperty, ndb.DateTimeProperty, ndb.TimeProperty)):
                    prop_value = utils.date_from_str(prop_type, prop_value)
                elif isinstance(prop_type, ndb.KeyProperty):
                    prop_value = ndb.Key(urlsafe=prop_value)
                setattr(self, property, prop_value)