Question

我创建了一个订户（用于任何更新，创建或更新事件）以创建日志系统（日志是一个实体，在我的应用程序中具有所有事件的记录），但是我遇到了一个问题：当我进行冲洗时，冲洗超过了执行时间。

class EntitySubscriber implements EventSubscriber
{
    public function __construct(TokenStorageInterface $tokenStorage)
    {
        $this->tokenStorage = $tokenStorage;
    }

    /**
     * Returns an array of events this subscriber wants to listen to.
     *
     * @return array
     */
    public function getSubscribedEvents()
    {
        return array(
            'postPersist',
            'postUpdate',
            'postRemove'
        );
    }

    public function postUpdate(LifecycleEventArgs $args)
    {
        $this->save($args, 'update');
    }

    public function postPersist(LifecycleEventArgs $args)
    {
        $this->save($args, 'create');
    }

    public function postRemove(LifecycleEventArgs $args)
    {
        $this->save($args, 'delete');
    }

    private function save($args, $type)
    {
        $entity = $args->getEntity();
        $entityManager = $args->getEntityManager();

        $event = '';
        if ($entity instanceof User) {
            $changeArray = $args->getEntityManager()->getUnitOfWork()->getEntityChangeSet($args->getObject());
            if(array_key_exists('lastLogin', $changeArray))
                $event = $entity->getUsername(). ' has been authenticated';
            elseif($type == 'update')
                $event = 'User '.$entity->getUsername(). ' has been updated';
            elseif ($type == 'create')
                $event = 'User '.$entity->getUsername(). ' has been created';
            elseif ($type == 'delete')
                $event = $entity->getUsername(). ' has been deleted';

        }
        // check if the user successfully authenticated
        if ($token = $this->tokenStorage->getToken())
            if (($user = $token->getUser()) instanceof User){
                $userLog = new UserLog();
                $userLog->setUser($user);
                $userLog->setEvent($event);
                $userLog->setType($type);
                $entityManager->persist($userLog);
                $entityManager->flush();
            }
        }
    }

Answer 1

通过从此事件订阅者下调用flush()，您正在进入一个无限循环。这就是导致您的请求超时的原因。

您还为UserLog实体执行了// check if the user successfully authenticated，因为您没有检查$entity type。

因此解决方案是：

1）删除该flush（）调用，因为那里根本不需要它

2）添加可跳过UserLog实体的save()操作的支票

private function save($args, $type){

    $entity = $args->getEntity();

    //Prevent logging the UserLog entity operations to avoid endless loop
    if($entity instanceof UserLog) return;

    ...

}

symfony：在类中实现EventSubscriber（刷新不起作用）

1 个答案: