Run a raw update against the base query.

        :type attributes: dict

        :rtype: int

def raw_update(self, attributes=None):
        """
        Run a raw update against the base query.

        :type attributes: dict

        :rtype: int
        """
        if attributes is None:
            attributes = {}

        if self._query is not None:
            return self._query.update(attributes)