加载同一 Doctrine_Record 的多个版本时遇到问题
以下代码片段演示了 Doctrine 的一些特殊行为。
$user = Doctrine::getTable('User')->find(1);
$user->name = 'Zoppy';
// This line prevents the subsequent $user->save() from working as expected
$old_user = Doctrine::getTable('User')->find(1);
$user->save();
// Does not print 'Zoppy'
echo Doctrine::getTable('User')->find(1)->name . "\n";
这是怎么回事？
在执行保存之前是否有某种方法可以加载旧版本的记录？似乎 Doctrine 正在某处缓存某些内容 - 到底是什么，以及如何将其关闭！ （至少暂时是这样。）
The following code snippet demonstrates some peculiar behaviour from Doctrine.
$user = Doctrine::getTable('User')->find(1);
$user->name = 'Zoppy';
// This line prevents the subsequent $user->save() from working as expected
$old_user = Doctrine::getTable('User')->find(1);
$user->save();
// Does not print 'Zoppy'
echo Doctrine::getTable('User')->find(1)->name . "\n";
What is going on here?
Is there some way to load the old version of a record before executing a save? It seems that Doctrine is caching something somewhere -- what exactly, and how do I turn it off! (At least temporarily.)
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我最近问了一个类似的问题，尽管我是用关系来表达的。但答案是，这取决于 Doctrine 中缓存的本质。学说是将含水的物体保留在记忆中。您可以
克隆该对象，但一旦遵循任何关系，您就会回到原点。I asked a similar question recently, although I phrased it in terms of relationships. The answer though is that this is down to the nature of caching in Doctrine. Doctrine is keeping hydrated objects in memory. You can
clonethe object, but as soon as you follow any relationships you'll be back to square one.