def get_one(self, schema, query=None, **kwargs):
        """
        get one row from the db matching filters set in query

        schema -- Schema()
        query -- Query()

        return -- dict -- the matching row
        """
        ret = self._get_query(self._get_one, schema, query, **kwargs)
        if not ret: ret = {}
        return ret
get one row from the db matching filters set in query

        schema -- Schema()
        query -- Query()

        return -- dict -- the matching row