表单正在替换我在 Symfony 4 中的变量

Question

我想更新一个名为 SAI 的实体的用户列表，但是在提交表单后，我丢失了我要更新的 SAI 的信息，它被表单返回的 SAI 所取代。

我试图在以下代码中解释评论会发生什么：

EdditSAIController.php

/**
 * @Route("/edit_sai/{id}/", name="edit_sai", requirements={"page"="\d+"}))
 * @Method({"GET"})
 * @param Request $request
 * @return \Symfony\Component\HttpFoundation\Response
 */
public function editSAI(Request $request)
{
    $entityManager = $this->getDoctrine()->getManager();
    $idSAI = $request->attributes->get('id_sai'); //Get the ID of the SAI from the link
    $sai = $this->getDoctrine()->getRepository(SAI::class)->find($idSAI); //Find the SAI in the database
    $oldUsers = $sai->getUsers(); //Get the users of the SAI
    $form = $this->createForm(SAIType::class,$sai); //Create the form, which includes a serial number and a list of users that you can modify, by adding or removing users
    $form->handleRequest($request);

    if ($form->isSubmitted()) {

        $newSAI = $form->getData(); //Get the data of the new SAI
        $sai->setSerialNumber($newSAI->getSerialNumber()); //Update the serial number
        $usersToAdd = $newSAI->getUsers();

        //If the old users are not in the list of users of the SAI returned by the form, it means that they got removed and
        //I have to remove them from the current SAI
        //(this is where the problem starts, since $oldUsers now contains the same users as the $newSAI, and I don't know why)
        //(and of course both of these loops won't work because $oldUsers and $usersToAdd contain the same data)
        foreach($oldUsers as $oldUser){
            if (!$usersToAdd->contains($oldUser)){
                $sai->deleteUser($oldUser);
            }
        }

        //Add the new users to the current SAI
        foreach($usersToAdd as $newUser){
            $sai->addUser($newUser);
        }

        //Update SAI
        $entityManager->persist($sai);
        $entityManager->flush();

        return $this->redirectToRoute('sais');
    }

    return $this->render('management/edit_sai.html.twig', array(
        'form' => $form->createView(),
    ));
}

edit_sai.html.twig

{%  extends 'home/index.html.twig' %}

{%  block body %}

<div class="main">
    <h1>Editar SAI</h1>
    <hr>
    <div class="formUsers">
        {{ form_start(form) }}
        {{ form_end(form) }}
    </div>
</div>

{%  endblock %}

{% block javascripts %}
{{ parent() }}
    <script src="https://cdnjs.cloudflare.com/ajax/libs/select2/4.0.6-rc.0/js/select2.min.js"></script>
    <script> $('select[data-select="true"]').select2({}); </script>
{% endblock %}

知道我做错了什么吗？我应该怎么做才能解决它？谢谢

Answer 1

我终于找到问题所在了。
正如 Deniz Aktürk 在评论中所说，使用就足够了：

if ($form->isSubmitted()) {
    //Update SAI
    $entityManager->persist($sai);
    $entityManager->flush();
}

但问题是我的函数名称：
- 在 User.php class 中，我使用了 delteSAI() 而不是 removeSAI()。
- 在 SAI.php class 中，我有 deleteUser() 而不是 removeUser()。

我还在两个 classes 中添加了 cascade={"persist", "remove"}:

User.php

/**
 * @ORM\ManyToMany(targetEntity="App\Entity\SAI", inversedBy="users", cascade={"persist", "remove"})
 * @ORM\JoinTable(name="users_sais")
 */
private $sais;

SAI.php

/**
 * @ORM\ManyToMany(targetEntity="App\Entity\User", mappedBy="sais", cascade={"persist", "remove"})
 */
private $users;

我不知道 Symfony4 对函数命名如此严格。我希望这会对某人有所帮助。

表单正在替换我在 Symfony 4 中的变量

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