/** * Round about solution to debug lambda function * @param $validator * @return bool */ protected function checkCompositeUnique($validator) { $pertemuan = $validator->getData()['pertemuan_ke']; $id_matkul = $validator->getData()['Kode_Matkul']; $course = Course::instanceByKodeMatkul($id_matkul); $stat = Topic::isExist($pertemuan, $course->seksi); if ($stat) { return true; } return false; }