/** * Finds the AuthItemChild model based on its primary key value. * If the model is not found, a 404 HTTP exception will be thrown. * @param string $parent * @param string $child * @return AuthItemChild the loaded model * @throws NotFoundHttpException if the model cannot be found */ protected function findModel($parent, $child) { if (($model = AuthItemChild::findOne(['parent' => $parent, 'child' => $child])) !== null) { return $model; } else { throw new NotFoundHttpException('The requested page does not exist.'); } }