public function actionView($id)
 {
     $this->view_data['article'] = $article = Article::find()->where("id = {$id}")->asArray()->one();
     //获取这篇文章的所有留言
     $this->view_data['comments'] = Article::getComments($article['id']);
     return $this->render('view', $this->view_data);
 }
 public function actionComments($article_id = 0)
 {
     if (Yii::$app->request->isAjax) {
         $comment_id = intval(Yii::$app->request->get('comment_id'));
         $comment = Comment::find()->where("id = {$comment_id}")->one();
         $comment->status = Comment::STATUS_DELETE;
         $comment->save();
         return json_encode(['errCode' => 0]);
     }
     $comments = Article::getComments($article_id);
     return $this->render('comments', ['comments' => $comments]);
 }