如何在symfony中禁用软删除(软删除)过滤器

Question

为Doctrine 2安装和使用SoftDeleteable行为扩展非常容易。问题通常是试图对某些代码部分禁用它，然后再次启用。您可能需要这样做：

1. 加载被软删除的实体
2. 完全绕过软删除过滤器从数据库中删除实体

那么如何禁用它呢？

Answer 1

1.如何加载软删除实体

根据文档，禁用实体管理器筛选器：

$em->getFilters()->disable('softdeleteable');
$object = $em->find('AppBundle:Object', 1); // soft-deleted entity will be loaded

若要启用软删除，请再次删除：

$em->getFilters()->enable('softdeleteable');

注意:如果实体已经加载了禁用的软删除筛选器，则这行之前可能需要$em->clear();。

2.如何从数据库中完全删除实体

即使文档中没有提到第一个解决方案，如果您需要删除实体并绕过软删除筛选器，则第一个解决方案不起作用。需要从实体管理器的事件侦听器中删除筛选器：

// initiate an array for the removed listeners
$originalEventListeners = [];

// cycle through all registered event listeners
foreach ($em->getEventManager()->getListeners() as $eventName => $listeners) {
    foreach ($listeners as $listener) {
        if ($listener instanceof \Gedmo\SoftDeleteable\SoftDeleteableListener) {

            // store the event listener, that gets removed
            $originalEventListeners[$eventName] = $listener;

            // remove the SoftDeletableSubscriber event listener
            $em->getEventManager()->removeEventListener($eventName, $listener);
        }
    }
}

// remove the entity
$em->remove($object);
$em->flush($object); // or $em->flush();

// re-add the removed listener back to the event-manager
foreach ($originalEventListeners as $eventName => $listener) {
    $em->getEventManager()->addEventListener($eventName, $listener);
}

参考文献：

• https://github.com/Atlantic18/DoctrineExtensions/blob/master/doc/softdeleteable.md
• Force delete doctrine entity when using SoftDeletable by KnpLabs
• Disable Soft Deleteable filter for hard delete record doesn't work

Answer 2

可以使用服务禁用和重新启用软删除筛选器行为：

<?php

namespace App\Util;

use Doctrine\ORM\EntityManagerInterface;
use Gedmo\SoftDeleteable\SoftDeleteableListener;

class SoftDeleteFilter
{
    /**
     * @var string
     */
    const EVENT_NAME = 'onFlush';

    /**
     * @var object
     */
    private $originalEventListener;

    /**
     * @param EntityManagerInterface $em
     */
    public function removeSoftDeleteFilter(EntityManagerInterface $em)
    {
        foreach ($em->getEventManager()->getListeners() as $eventName => $listeners) {
            foreach ($listeners as $listener) {
                if ($listener instanceof SoftDeleteableListener) {
                    if ($eventName === self::EVENT_NAME) {
                        $this->originalEventListener = $listener;
                        $em->getEventManager()->removeEventListener($eventName, $listener);
                    }
                }
            }
        }
    }

    /**
     * @param EntityManagerInterface $em
     */
    public function undoRemoveSoftDeleteFilter(EntityManagerInterface $em)
    {
        if (empty($this->originalEventListener)) {
            throw new \Exception('can not undo remove, soft delete listener was not removed');
        }
        // re-add the removed listener back to the event-manager
        $em->getEventManager()->addEventListener(self::EVENT_NAME, $this->originalEventListener);
    }
}

用法：

$this->softDeleteFilter->removeSoftDeleteFilter($this->entityManager);
$this->entityManager->remove($entity);
$this->entityManager->flush();
$this->softDeleteFilter->undoRemoveSoftDeleteFilter($this->entityManager);

Answer 3

只是个小小的提醒。

当您想要使用Gedmo硬删除实体时，必须在相应的注释中包含hardDelete=true，请参见：

@Gedmo\SoftDeleteable(fieldName="deletedAt", timeAware=false, hardDelete=true)

编辑:默认情况下，hardDelete=true为真

这样，您就不必禁用侦听器/筛选器。如果您有hardDelete=false，上面建议的双移除将无法工作。

来源：

• https://github.com/Atlantic18/DoctrineExtensions/blob/v2.4.x/doc/softdeleteable.md