Doctrine在父行上加入用户组

// User.php
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 */
class User
{
    /**
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @ORM\ManyToMany(targetEntity="Group", inversedBy="users")
     * @ORM\JoinTable(name="user_group")
     */
    private $groups;

    public function __construct()
    {
        $this->groups = new ArrayCollection();
    }

    // ... getters and setters
}

// Group.php
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;

/**
 * @ORM\Entity
 */
class Group
{
    /**
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

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

    public function __construct()
    {
        $this->users = new ArrayCollection();
    }

    // ... getters and setters
}

$user = $entityManager->getRepository(User::class)->find($userId);
$group = $entityManager->getRepository(Group::class)->find($groupId);

$user->getGroups()->add($group);
$entityManager->persist($user);
$entityManager->flush();