从Symfony2中的表单获取数据后克隆对象 [英] Cloning object after getting data from a form in Symfony2

问题描述

我确定我在这里缺少一些非常基本的东西。

I'm sure I'm missing something very basic here.

我有一个表单，当用户更新表单的字段时，我不想要更新底层的实体，但是想要创建一个新的实体与新的值。

I have a form, and when the user updates the fields of the form I don't want to update the underlying entity but want to create a new entity with the new values.

要克隆Doctrine实体，我遵循指示here 。

To clone Doctrine entities I followed the indication here.

所以我的代码是（我们想要克隆id = 3的对象：

So my code is (let's say I want to clone the object with id=3:

    $id = 3;
    $storedBI = $this->getDoctrine()
                     ->getRepository('AppBundle:BenefitItem')
                     ->find($id);
    $form = $this->createForm(new BenefitItemFormType(), $storedBI);

    $form->handleRequest($request);

    if ($form->isValid())
        {
            $em = $this->getDoctrine()->getManager();  
            $newBI = clone $form->getData();
            $em->persist($newBI);
            $em->flush();
        }

它根本不起作用，它正确地创建了一个新对象，新的数据从表单传递（这是可以的），但也是使用相同的新数据更新旧存储对象。

It simply does not work. It properly creates a new object with the new data passed from the form (which is ok), but also updates the "old" stored object with the same new data.

任何想法？

推荐答案

你必须克隆你的对象d创建表单：

You have to clone your object during the form creation:

$ form = $ this-> createForm（new BenefitItemFormType（），clone $ storedBI）;

如果这不起作用，首先尝试分离您的克隆对象。

If this does not work, try to detach your cloned object first.

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