public function assignTo($respondentRelationId, $relationFieldId)
    {
        if ($this->getRelationFieldId() == $relationFieldId && $this->getRelationId() == $respondentRelationId) return 0;

        return $this->_updateToken(array(
            'gto_id_relation'=>$respondentRelationId,
            'gto_id_relationfield'=>$relationFieldId
            ), $this->loader->getCurrentUser()->getUserId());
    }