public function actionCreate()
 {
     $result = 0;
     if (Yii::$app->request->isPost && ($model = ProductFollowing::create(Yii::$app->request->post()))) {
         if ($model->hasErrors()) {
             $result = json_encode($model->getErrors());
         } else {
             $result = 1;
         }
     }
     return $result;
 }