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