Question

我知道有很多像这样的问题，但我向你保证，我已经过去了6个小时寻找互联网如何才能解决这个问题，但没有成功......

我使用Symfony2控制器作为服务，因此我必须将我需要的所有内容发送到控制器的__construct方法。

我正在尝试使用2个实体，其中一个是“用户”，另一个是“部门”（我附上下面的文件内容），我有每个实体的存储库。

在用户实体内我使用@ORM\ManyToOne与@ORM\JoinColumn，而在部门实体内我有@ORM\OneToMany。

所以，当我尝试这样做时......

$department = $this->departmentRepository->find(1);
$users = $department->getUsers();

...我得到ArrayCollection()，但是当我这样做时......

$user = $this->userRepository->find(1);
$department = $user->getDepartment();

...此方法返回“null”而不是Department()

我检查了MySQL表，我向你保证，“users”表中存储的记录有部门的ID。所以，我不明白为什么会这样......

这是用户实体配置，关于@ORM\ManyToOne和@ORM\JoinColumn：

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Table(name="`users`", options={"collate"="utf8_unicode_ci"})
 * @ORM\Entity(repositoryClass="AppBundle\Repository\UserRepository")
 */
class User
{
    // Here there are other properties

    /**
     * @ORM\ManyToOne(targetEntity="Department", inversedBy="users")
     * @ORM\JoinColumn(name="`department_id`", referencedColumnName="`id`", nullable=true)
     */
    private $department;

    // Here there are Getters and Setters
}

这是部门实体，关于@ORM \ OneToMany：

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Table(name="`departments`", options={"collate"="utf8_unicode_ci"})
 * @ORM\Entity(repositoryClass="AppBundle\Repository\DepartmentRepository")
 */
class Department
{
    // Here there are other properties

    /**
     * @ORM\OneToMany(targetEntity="User", mappedBy="department")
     */
    private $users;

    // Here there are Getters and Setters, and the Constructor
}

这是UserController：

<?php

namespace AppBundle\Controller;

use AppBundle\Entity\User;
use AppBundle\Repository\UserRepository;
// There are more "use", I have cleaned this source code

/**
 * @Route(service="app.user.controller")
 */
class UserController
{
    // There are more properties

    /**
     * @var UserRepository
     */
    private $userRepository;

    // There are a constructor with this:
    public function __constructor(UserRepository $userRepository) { $this->userRepository = $userRepository; }

    /**
     * There is a method to list all users (it works) but does not load the departments
     */
    public function listAction()
    {
        $users = $this->userRepository->findAll();
        exit(var_dump($users[0]->getDepartment()));
        return ['users' => $users];
    }
}

有人可以帮助我吗？

谢谢伙伴们，

Symfony2 Service Doctrine ManyToOne返回null

0 个答案: