Question

我在cakephp中使用事件监听器在帖子之后保存通知一切都很好，我的事件监听器功能很好但我想我无法从事件功能访问我的通知表这是我的错误：

Undefined property: AddNotification::$Notification [APP\Lib\Event\AddNotification.php, line 15]

这是我喜欢的投票模型：

App::uses('CakeEvent', 'Event');

class Vote extends AppModel {

    var $useTable = 'votes';

    public $actsAs = array('Containable');

    public $belongsTo = array('User','Tail');
    public function afterSave($created, $options = array()) {
       if ($created) {
            $event = new CakeEvent('Model.Vote.created', $this, array(
                'data' => $this->data[$this->alias]
            ));
            $this->getEventManager()->dispatch($event);
        }
    }

和我在AddNotification.php中的功能：

<?php 
App::uses('CakeEventListener', 'Event');

class AddNotification implements CakeEventListener {

    public function implementedEvents() {
        return array(
            'Model.Vote.created' => 'addANotification',
        );
    }

    public function addANotification($event) {
        // Code to update votes
        pr($event->data['data']);
        $notified = $this->Notification->find('all',array(
            'conditions'=>array('Notification.user_id'=>$this->CustomAuth->User('id'),'Notification.tail_id'=>$this->data['tail_id'])
        ));
        // pr($notified);
        if(!empty($notified)) {
                $this->Notification->delete($notified[0]['Notification']['id']);
                $this->Notification->create();
                $notifi['Notification']['user_id'] = $this->CustomAuth->user('id');
                $notifi['Notification']['tail_id'] = $event->data['data']['tail_id'];
                if($event->data['data']['value']==1) {
                    $notifi['Notification']['message'] = "Tail has been liked";
                }
                else {
                    $notifi['Notification']['message'] = "Tail has been disliked";
                }
                if ($this->Notification->save($notifi)) {       
                    $message = 'notifi saved';
                }
                else {
                    $message = 'notifi not saved';

                }
        }
        else {
            $this->Notification->create();
            $notifi['Notification']['user_id'] = $this->CustomAuth->user('id');
            $notifi['Notification']['tail_id'] = $event->data['data']['tail_id'];
            if($event->data['data']['value']==1) {
                $notifi['Notification']['message'] = "Tail has been liked";
            }
            else {
                $notifi['Notification']['message'] = "Tail has been disliked";
            }
            if ($this->Notification->save($notifi)) {       
                $message = 'notifi saved';
            }
            else {
                $message = 'notifi not saved';

            }
        }
    }
}

 ?>

请帮我改进它

Answer 1

未定义属性：AddNotification :: $ Notification [APP \ Lib \ Event \ AddNotification.php，第15行]

错误很明显？是什么让你认为你可以神奇地访问某个模型实例的非现有属性？

您需要先加载模型实例。

$notification = ClassRegistry::init('Notification');
$notification->find(/*...*/);

这行

会出现同样的错误

$this->CustomAuth

看起来您不了解对象如何在此场景中传递和实例化。代码看起来就像您只需将控制器代码复制并粘贴到监听器类中。这不行。花一些时间试图理解MVC架构以及事件如何工作而不是触发它们。解释你在这里看到的所有含义只是为了很长时间。

在cakephp2.x事件函数中保存数据库中的数据

1 个答案: