学说,关系 ManyToOne

Doctrine, ralation ManyToOne

尝试更新我的数据库时出现错误:

SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails (symfony.#sql-d8c_55, CONSTRAINT FK_957A6479A233CB39 FOREIGN KEY (klient_id) REFERENCES klient (id))

我的 class 用户:

namespace AppBundle\Entity;

use Doctrine\Common\Collections\ArrayCollection;
use FOS\UserBundle\Model\User as BaseUser;
use Doctrine\ORM\Mapping as ORM;


/**
 * Class User
 * @package AppBundle\Entity
 *
 * @ORM\Table("fos_user")
 * @ORM\Entity()
 */
class User extends BaseUser
{
    /**
     * @ORM\Id
     * @ORM\Column(type="integer")
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    protected $id;


    /**
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Klient", inversedBy="users")
     * @ORM\JoinColumn(nullable=false)
     */
    private $klient;

    /**
     * @return mixed
     */
    public function getKlient()
    {
        return $this->klient;
    }

    /**
     * @param mixed $klient
     */
    public function setKlient($klient)
    {
        $this->klient = $klient;
    }

    public function __construct()
    {
        parent::__construct();

    }
}

class客户端

namespace AppBundle\Entity;

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\Mapping as ORM;

/**
 * Klient
 *
 * @ORM\Table(name="klient")
 * @ORM\Entity(repositoryClass="AppBundle\Repository\KlientRepository")
 */
class Klient
{
    /**
     * @var int
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string
     *
     * @ORM\Column(name="nazwa", type="string", length=255, unique=true)
     */
    private $nazwa;


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

    /**
     * Get id
     *
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Set nazwa
     *
     * @param string $nazwa
     *
     * @return Klient
     */
    public function setNazwa($nazwa)
    {
        $this->nazwa = $nazwa;

        return $this;
    }

    /**
     * Get nazwa
     *
     * @return string
     */
    public function getNazwa()
    {
        return $this->nazwa;
    }

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

我认为您出现此错误是因为您的数据库中已有数据。当您尝试在用户 table 上添加外键时,kcient_id 为空。在您的定义中,您指定 nullable: false.

建议分两次进行。

  1. 将您的注释编辑为可为空:true,将您的数据库和link您的客户端更新为 klient

  2. 重新编辑你的注释为 nullable: false,应该没问题