public function actionUpdate($id)
 {
     /* @var Websites $model */
     $model = Websites::findOne($id);
     $form = new WebsiteForm();
     if ($form->load($_POST) && $form->validate()) {
         $model->setAttributes($form->getAttributes(null, ['user_id']), false);
         $model->on(Websites::EVENT_AFTER_UPDATE, function ($event) use($form) {
             $model = $event->sender;
             WebsiteHasUser::deleteAll(['website_id' => $model->id]);
             if ($form->user_id) {
                 WebsiteHasUser::batchInsertByCondition(['user_id'], explode(',', $form->user_id), ['website_id' => $model->id]);
             }
         });
         $model->update(false);
         return $this->redirect('index');
     }
     $form->setAttributes($model->getAttributes());
     $form->user_id = implode(',', ArrayHelper::getColumn($model->websiteHasUser, 'user_id'));
     return $this->render('update', ['model' => $form]);
 }