在Symfony 2.1中为preUpdate调用添加额外的持久调用

问题描述

我的应用程序中有一个preUpdate侦听器。当它被触发时，我希望它创建一些额外的记录。以下是基本功能的简化示例。在这个当前的实现中，似乎新的事件不会被持久化。是否有其他电话我需要在这里做？谢谢。

  public function preUpdate（Event\LifecycleEventArgs $ eventArgs）
 {
 $ em = $ eventArgs-> getEntityManager（）; 
 $ uow = $ em-> getUnitOfWork（）; 
 $ entity = $ eventArgs-> getEntity（）; 
 
 $ updateArray = $ eventArgs-> getEntityChangeSet（）; 
 
 //更新
 if（（$ entity instanceof Bam）=== false）{
 $ thing = new OtherThing（）; 
 $ thing-> setFoo（'bar'）; 
 
 $ uow-> persist（$ thing）; 
} 
 
 $ uow-> computeChangeSets（）; 
} 
  

解决方案

关键是坚持冲洗后：

 <？php 
 
命名空间Comakai\CQZBundle\Handler; 
 
使用Symfony\Component\DependencyInjection\ContainerInterface; 
使用Doctrine\Common\EventSubscriber; 
使用Doctrine\ORM\Event; 
 
 / ** 
 * 
 * / 
 class YourHandler实现EventSubscriber 
 {
 protected $ things = []; 
 
 public function getSubscribedEvents（）
 {
 / ** 
 * @todo检查这是否在控制台中运行或什么... 
 * / 
 if（isset（$ _ SERVER ['HTTP_HOST']））{
 
 return [
'preUpdate'，
'postFlush'
]; 
} 
 
 return []; 
} 
 
 public function preUpdate（Event\LifecycleEventArgs $ eventArgs）
 {
 $ em = $ eventArgs-> getEntityManager（）; 
 $ uow = $ em-> getUnitOfWork（）; 
 $ entity = $ eventArgs-> getEntity（）; 
 
 $ updateArray = $ eventArgs-> getEntityChangeSet（）; 
 
 //更新
如果（（$ entity instanceof Bam）=== false）{
 
 $ thing = new OtherThing（）; 
 $ thing-> setFoo（'bar'）; 
 
 $ this-> thing [] = $ thing; 
} 
} 
 
 public function postFlush（Event\PostFlushEventArgs $ event）
 {
 if（！empty（$ this-> things） ）{
 
 $ em = $ event-> getEntityManager（）; 
 
 foreach（$ this->东西为$东西）{
 
 $ em-> persist（$ thing）; 
} 
 
 $ this-> things = []; 
 $ em-> flush（）; 
} 
} 
} 
  

I have a preUpdate listener in my app. When it is fired I want it to create some additional records. A simplified example of the basic functionality is below. In this current implementation it would appear that the new events are not being persisted. Are there other calls I need to be making here? Thanks.

public function preUpdate(Event\LifecycleEventArgs $eventArgs)
{
    $em = $eventArgs->getEntityManager();
    $uow = $em->getUnitOfWork();
    $entity = $eventArgs->getEntity();

    $updateArray = $eventArgs->getEntityChangeSet();

    //Updates
    if (($entity instanceof Bam) === false) {
        $thing = new OtherThing();
        $thing->setFoo('bar');

        $uow->persist($thing);
    }

    $uow->computeChangeSets();
}

解决方案

The key is to persist them after the flush:

<?php

namespace Comakai\CQZBundle\Handler;

use Symfony\Component\DependencyInjection\ContainerInterface;
use Doctrine\Common\EventSubscriber;
use Doctrine\ORM\Event;

/**
 *
 */
class YourHandler implements EventSubscriber
{
    protected $things = [];

    public function getSubscribedEvents()
    {
        /**
         * @todo Check if this is running in the console or what...
         */
        if (isset($_SERVER['HTTP_HOST'])) {

            return [
                'preUpdate',
                'postFlush'
            ];
        }

        return [];
    }

    public function preUpdate(Event\LifecycleEventArgs $eventArgs)
    {
        $em = $eventArgs->getEntityManager();
        $uow = $em->getUnitOfWork();
        $entity = $eventArgs->getEntity();

        $updateArray = $eventArgs->getEntityChangeSet();

        //Updates
        if (($entity instanceof Bam) === false) {

            $thing = new OtherThing();
            $thing->setFoo('bar');

            $this->things[] = $thing;
        }
    }

    public function postFlush(Event\PostFlushEventArgs $event)
    {
        if(!empty($this->things)) {

            $em = $event->getEntityManager();

            foreach ($this->things as $thing) {

                $em->persist($thing);
            }

            $this->things = [];
            $em->flush();
        }
    }
}

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