（doctrine2 + symfony2）cascading remove：integrity constraint violation 1451 [英] (doctrine2 + symfony2) cascading remove : integrity constraint violation 1451

问题描述

首先，对不起我可怜的英语...

First, sorry for my poor english...

我有四个实体：用户，应用程序，捆绑和实体。这里是他们的关系（与级联持续和删除，见下面的代码）：

I got four entities : User, Application, Bundle & Entity. Here are their relations (with cascading persist & remove, see code below) :

• 用户 1-n 应用


• 应用 1-n 捆绑


• 捆绑 1-n 实体

• User 1-n Application
• Application 1-n Bundle
• Bundle 1-n Entity

它的工作正常。但用户可以将其两个实体作为默认值，我需要直接访问它们。

It's working fine. But an User can have two of his entities as default, an I need to access them directly.

所以我添加了用户两个字段，entity1& entity2，具有 1-1 关系。现在我的应用程序崩溃了：

So I add on User two fields, entity1 & entity2, with a 1-1 relation. And now my app crashes :

An exception occurred while executing 'DELETE FROM bundle WHERE id = ?' with params {"1":13}:

SQLSTATE[23000]: Integrity constraint violation: 1451 Cannot delete or update a parent row: a foreign key constraint fails (`misc`.`entity`, CONSTRAINT `FK_E284468F1FAD9D3` FOREIGN KEY (`bundle_id`) REFERENCES `bundle` (`id`))

我尝试了几件事，包括那些在这篇文章中创建的人，但我不是'

I tried several things, including those founded in this post, but I wasn't able to fix it.

任何帮助都可以提前谢谢。

Any help be welcome, thanks in advance.

编辑： 我需要指出，用户 - >实体关系是可选的：用户实体1& entity2可以为null。

EDIT : I need to point out that User->Entity relations are optionnal : User's entity1 & entity2 can be null. The error happens even if they are null both.

这是我的实体定义：

# User :
    /**
     * @ORM\OneToMany(targetEntity="\sfCommands\ContentBundle\Entity\Application", mappedBy="user", cascade={"remove"}, orphanRemoval=true)
     * @ORM\OrderBy({"name" = "ASC"})
     */
    protected $applications;

    /**
     * @ORM\OneToOne(targetEntity="\sfCommands\ContentBundle\Entity\Entity")
     * @ORM\JoinColumn(name="entity1_id", referencedColumnName="id")
     */
    private $entity1;

    /**
     * @ORM\OneToOne(targetEntity="\sfCommands\ContentBundle\Entity\Entity")
     * @ORM\JoinColumn(name="entity2_id", referencedColumnName="id")
     */
    private $entity2;

#Application :
    /**
     * @ORM\OneToMany(targetEntity="\sfCommands\ContentBundle\Entity\Bundle", mappedBy="application", cascade={"remove"}, orphanRemoval=true)
     * @ORM\OrderBy({"name" = "ASC"})
     */
    protected $bundles;

    /**
     * @ORM\ManyToOne(targetEntity="\sfCommands\UserBundle\Entity\User", inversedBy="applications", cascade={"persist"})
     * @ORM\JoinColumn(name="user_id", referencedColumnName="id")
     */
    protected $user;

#Bundle :
    /**
     * @ORM\ManyToOne(targetEntity="\sfCommands\ContentBundle\Entity\Application", inversedBy="bundles", cascade={"persist"})
     * @ORM\JoinColumn(name="application_id", referencedColumnName="id")
     */
    protected $application;

    /**
     * @ORM\OneToMany(targetEntity="\sfCommands\ContentBundle\Entity\Entity", mappedBy="bundle", cascade={"remove"}, orphanRemoval=true)
     * @ORM\OrderBy({"name" = "ASC"})
     */
    protected $entitys;

#Entity :
    /**
     * @ORM\ManyToOne(targetEntity="\sfCommands\ContentBundle\Entity\Bundle", inversedBy="entitys", cascade={"persist"})
     * @ORM\JoinColumn(name="bundle_id", referencedColumnName="id")
     */
    protected $bundle;

推荐答案

所以，感谢法国论坛，我修正了这个问题。

So, thanks to that french forum, I fixed the problem.

我需要添加 nullable = true onDelete =SET NULL在@ ORM\JoinColumn

I needed to add nullable=true & onDelete="SET NULL" in @ORM\JoinColumn

这是可行的配置，也许这​​将有助于某人：

Here is the workable configuration, maybe it will help someone :

#User.
    /**
     * @ORM\OneToMany(targetEntity="\sfCommands\ContentBundle\Entity\Application", mappedBy="user", cascade={"remove"}, orphanRemoval=true)
     * @ORM\OrderBy({"name" = "ASC"})
     */
    protected $applications;

    /**
     * @ORM\OneToOne(targetEntity="\sfCommands\ContentBundle\Entity\Entity")
     * @ORM\JoinColumn(name="entity1_id", referencedColumnName="id", nullable=true, onDelete="SET NULL")
     */
    private $entity1;

    /**
     * @ORM\OneToOne(targetEntity="\sfCommands\ContentBundle\Entity\Entity")
     * @ORM\JoinColumn(name="entity2_id", referencedColumnName="id", nullable=true, onDelete="SET NULL")
     */
    private $entity2;

#Application.
    /**
     * @ORM\OneToMany(targetEntity="\sfCommands\ContentBundle\Entity\Bundle", mappedBy="application", cascade={"remove"}, orphanRemoval=true)
     * @ORM\OrderBy({"name" = "ASC"})
     */
    protected $bundles;

    /**
     * @ORM\ManyToOne(targetEntity="\sfCommands\UserBundle\Entity\User", inversedBy="applications", cascade={"persist"})
     * @ORM\JoinColumn(name="user_id", referencedColumnName="id", nullable=true, onDelete="SET NULL")
     */
    protected $user;

#Bundle.
    /**
     * @ORM\ManyToOne(targetEntity="\sfCommands\ContentBundle\Entity\Application", inversedBy="bundles", cascade={"persist"})
     * @ORM\JoinColumn(name="application_id", referencedColumnName="id", nullable=true, onDelete="SET NULL")
     */
    protected $application;

    /**
     * @ORM\OneToMany(targetEntity="\sfCommands\ContentBundle\Entity\Entity", mappedBy="bundle", cascade={"remove"}, orphanRemoval=true)
     * @ORM\OrderBy({"name" = "ASC"})
     */
    protected $entitys;

#Entity.
    /**
     * @ORM\ManyToOne(targetEntity="\sfCommands\ContentBundle\Entity\Bundle", inversedBy="entitys", cascade={"persist"})
     * @ORM\JoinColumn(name="bundle_id", referencedColumnName="id", nullable=true, onDelete="SET NULL")
     */
    protected $bundle;

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