def expand(self, id_user):
        """Expand comment beloging to user."""
        CmtCOLLAPSED.query.filter(db.and_(
            CmtCOLLAPSED.id_bibrec == self.id_bibrec,
            CmtCOLLAPSED.id_cmtRECORDCOMMENT == self.id,
            CmtCOLLAPSED.id_user == id_user)).delete(synchronize_session=False)
Expand comment beloging to user.