可删除）在symfony中过滤原则
为Doctrine 2安装和使用SoftDeleteable行为扩展非常简单。 问题通常是试图禁用某些代码部分并再次启用它。 您可能想要这样做：
那么如何禁用它呢？
1.如何加载软删除的实体
根据文档，禁用实体管理器的过滤器：
$em->getFilters()->disable('softdeleteable');
$object = $em->find('AppBundle:Object', 1); // soft-deleted entity will be loaded
要再次启用软删除：
$em->getFilters()->enable('softdeleteable');
注意： $em->clear(); 可能需要在此行之前，如果实体已经加载了禁用的软删除过滤器。
2.如何从数据库中完全删除实体
尽管在文档中没有提及它，但如果您需要删除实体并绕过软删除筛选器，则第一种解决方案不起作用。 过滤器需要从实体管理器的事件侦听器中删除：
// 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 GedmoSoftDeleteableSoftDeleteableListener) {
// 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：
您可以使用服务来禁用和重新启用软删除过滤器行为：
<?php
namespace AppUtil;
use DoctrineORMEntityManagerInterface;
use GedmoSoftDeleteableSoftDeleteableListener;
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);
$this->entityManager->remove($issue);
$this->entityManager->flush();
$this->softDeleteFilter->undoRemoveSoftDeleteFilter($this->entityManager);