教义2：删除和坚持相关实体的行为不同 [英] Doctrine2: Different behaviours on removing and persisting related Entities

问题描述

我有两个实体 Foo 和 Bar ， Bar 有一个 manyToOne 关联到 Foo 调用 $ foo 和 Foo 具有反向关联， oneToMany 关联称为 $ bars 和。而且在任何一方都定义了 no cascade 操作。现在我的问题是这样的，如果我获取一个 Foo 实例 $ foo ，然后创建并持续一些 Bar 具有 $ bar-> foo = $ foo 的实例，并将其持续到实体管理器和 flush ，那么如果我从存储库中重新获取 $ foo ， $ foo-> bar 不会包含刚才创建的 Bar 实例（除非我调用$ code> $ entityManager-> detach（$ foo ）
另一方面，如果我删除了一些 Bar 与 $ foo 通过调用 $ em-> remove（$ bar）和 flush 实体管理器，那么如果我从存储库中重新获取 $ foo ，我删除的栏实例将不会在 $ bars 属性中，我将再解释一些代码。

I have two Entities Foo and Bar, Bar has a manyToOne association to Foo called $foo and Foo has the inverse association, a oneToMany association called $bars and . And there are no cascade operations defined on any side. Now my problem is this, if I fetch one Foo instance $foo, then create and persist some Bar instances with $bar->foo = $foo, and persist them to the Entity Manager and flush it, then if I refetch $foo from the Repository, $foo->bars won't contain the Bar instances I just created (unless I call $entityManager->detach($foo) first. On the other hand if I remove some Bar entities related to $foo by calling $em->remove($bar) and flush the Entity Manager, then if I refetch $foo from the Repository, the Bar instances I removed won't be in the $bars property anymore. I'll explain more with some code.

$foo = $fooRepo->find($id);
$bar = new Bar($foo);
$entityManager->persist($bar);
$entityManager->flush();
$foo = $fooRepo->find($id);
var_dump($foo->getBars()); // $foo->bars won't contain $bar unless I detach $foo first

---

---

// Now the other case
$foo = $fooRepo->find($id);
$bars = $foo->getBars();
$bar = $bars[0];
$entityManager->remove($bar);
$entityManager->flush();
$foo = $fooRepo->find($id);
var_dump($foo->getBars()); // this time $foo->bars will reflect the changes we made.  

我想知道这是否是行为。

I want to know if this is expected Behavior.

推荐答案

想要评论，但仍然不能按照我的声誉： - （

Wanted to comment, but still can't according to my reputation :-(

但我很确定这回答了你的问题：当一个双向协议被更新时，Doctrine只会检查双方之间的这些变化，这被称为协会的拥有方。

But I am pretty sure this answers your question: "When a bidirectional assocation is updated, Doctrine only checks on one of both sides for these changes. This is called the owning side of the association."

查看有关协会的文档： http：// doctrine- orm.readthedocs.org/en/latest/reference/working-with-associations.html ，特别是 http://doctrine-orm.readthedocs.org/en/latest/reference/unitofwork-associations.html

Check the documentation for associations: http://doctrine-orm.readthedocs.org/en/latest/reference/working-with-associations.html and especially http://doctrine-orm.readthedocs.org/en/latest/reference/unitofwork-associations.html

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