public function actionAdd()
 {
     $likeModel = new Like();
     $postData = \Yii::$app->request->post();
     \Yii::$app->response->format = \yii\web\Response::FORMAT_JSON;
     // небольшая проверка на случай если уже поставлен, например на другой вкладке браузера
     $checkModel = Like::find()->where(['user_id' => \Yii::$app->user->getId(), 'model' => $postData['model'], 'item_id' => $postData['itemId']])->one();
     if ($checkModel) {
         return ['response' => true, 'url' => Url::toRoute('/like/element/remove'), 'totalCount' => Like::find()->where(['model' => $postData['model'], 'item_id' => $postData['itemId']])->count()];
     }
     $likeModel->user_id = \Yii::$app->user->getId();
     $likeModel->model = $postData['model'];
     $likeModel->item_id = $postData['itemId'];
     if ($likeModel->save()) {
         return ['response' => true, 'url' => Url::toRoute('/like/element/remove'), 'totalCount' => Like::find()->where(['model' => $postData['model'], 'item_id' => $postData['itemId']])->count()];
     }
     return ['response' => false];
 }