我搜索了已经涵盖的问题，但我不明白应该如何进行。我试了好几次，但都没有成功

我有comment.php：

    public function afterSave($created){
    if ($created) {
        $model = ClassRegistry::init($this->data[$this->alias]['ref']);
        // Manual countercache, it's more flexible, no need to add complex relation on Comment Model
        if($model->hasField('comment_count')){
            $model->id = $this->data[$this->alias]['ref_id'];
            $model->saveField('comment_count',$this->find('count',array(
                'conditions' => array('ref'=>$this->data[$this->alias]['ref'],'ref_id'=>$this->data[$this->alias]['ref_id'])
            )));
        }
        $this->getEventManager()->dispatch(new CakeEvent('Plugin.Comment.add', $this));
    }
}

和评论控制器。php:

$this->Comment->create($this->request->data, true);

我试图做的改变：

$this->Comment->create($this->request->data, true);

要$this-

对不起，但是我不明白我到底要做什么