public function getRol(PropelPDO $con = null) { if ($this->aRol === null && $this->fk_rol_id !== null) { $c = new Criteria(RolPeer::DATABASE_NAME); $c->add(RolPeer::ID, $this->fk_rol_id); $this->aRol = RolPeer::doSelectOne($c, $con); } return $this->aRol; }