def save(self):
        """
        Save the relationship

        :return: self
        """
        props = self.deflate(self.__properties__)
        query = "MATCH ()-[r]->() WHERE id(r)={self} "
        for key in props:
            query += " SET r.{0} = {{{1}}}".format(key, key)
        props['self'] = self.id

        db.cypher_query(query, props)

        return self
Save the relationship

        :return: self