/**
  * Displays a single Catalog model.
  * @param integer $id
  * @return mixed
  */
 public function actionView($id)
 {
     $model = $this->findModel($id);
     $dataProvider = new ActiveDataProvider(['query' => Item::find()->where(['catalogid' => $model->id])]);
     return $this->render('view', ['dataProvider' => $dataProvider, 'model' => $model]);
 }
 /**
  * Finds the Item model based on its primary key value.
  * If the model is not found, a 404 HTTP exception will be thrown.
  * @param integer $id
  * @return Item the loaded model
  * @throws NotFoundHttpException if the model cannot be found
  */
 protected function findModel($id)
 {
     if (($model = Item::findOne($id)) !== null) {
         return $model;
     } else {
         throw new NotFoundHttpException('The requested page does not exist.');
     }
 }