通过Symfony 2.1中的postUpdate侦听器找出改变的内容 [英] Finding out what changed via postUpdate listener in Symfony 2.1

问题描述

我有一个postUpdate侦听器，我想知道更新之前的值是什么，更新后的数据库条目的值是多少。在Symfony 2.1中有没有办法呢？我已经查看了getUnitOfWork（）中存储的内容，但是由于更新已经发生，因此它是空的。

I have a postUpdate listener and I'd like to know what the values were prior to the update and what the values for the DB entry were after the update. Is there a way to do this in Symfony 2.1? I've looked at what's stored in getUnitOfWork() but it's empty since the update has already taken place.

推荐答案

找到解决方案here 。实际上我需要的是preUpdate（）的一部分。我需要在LifecycleEventArgs上调用getEntityChangeSet（）。

Found the solution here. What I needed was actually part of preUpdate(). I needed to call getEntityChangeSet() on the LifecycleEventArgs.

我的代码：

public function preUpdate(Event\LifecycleEventArgs $eventArgs)
{   
    $changeArray = $eventArgs->getEntityChangeSet();

    //do stuff with the change array

}

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