UniqueEntity约束不起作用

Question

我正在尝试在我的用户实体上使用唯一的实体约束，但不知何故它不起作用。我仍然收到重复密钥的错误消息。

这是我的用户实体：

use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;

/**
 * @ORM\Table(name="Users")
 * @ORM\Entity(repositoryClass="App\Repository\UserRepository")
 * @UniqueEntity(
 *     fields={"email", "username"}
 * )
 */
class User implements AdvancedUserInterface, \Serializable
{
    /**
     * @ORM\Column(type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    public $id;

    /**
     * @ORM\Column(type="string", length=25, unique=true)
     */
    public $username;

    /**
     * @ORM\Column(type="string", length=64)
     */
    public $password;

    /**
     * @ORM\Column(type="string", length=128, unique=true)
     * @Assert\Email()
     */
    public $email;

    /**
     * @ORM\Column(name="is_active", type="boolean")
     */
    public $isActive;

    /**
     * @ORM\Column(name="roles", type="array")
     */
    public $roles = [];

    /**
     * @ORM\OneToOne(targetEntity="App\Entity\UserDetails", mappedBy="user", cascade={"persist", "remove"})
     */
    private $userDetails;

    /**
     * @ORM\ManyToMany(targetEntity="App\Entity\Assignment", mappedBy="user")
     */
    private $assignments;

    public function __construct()
    {
        $this->isActive = true;
        $this->assignments = new ArrayCollection();
        // may not be needed, see section on salt below
        // $this->salt = md5(uniqid('', true));
    }

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


    public function getEmail()
    {
        return $this->email;
    }

    public function setEmail($email)
    {
        $this->email = $email;
    }

    public function getUsername()
    {
        return $this->username;
    }

    public function setUsername($username)
    {
        $this->username = $username;
    }

    public function getPassword()
    {
        return $this->password;
    }

    public function setPassword($password)
    {
        $this->password = $password;
    }

    public function getSalt()
    {
        // The bcrypt and argon2i algorithms don't require a separate salt.
        // You *may* need a real salt if you choose a different encoder.
        return null;
    }


    public function getRoles()
    {
        $roles = $this->roles;

        if (!in_array('ROLE_USER', $roles)) {
            $roles[] = 'ROLE_USER';
        }
        return $roles;
    }

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

    public function setRoles(array $roles)
    {
        $this->roles = $roles;
    }

    public function eraseCredentials()
    {
    }

    /** @see \Serializable::serialize() */
    public function serialize()
    {
        return serialize(array(
            $this->id,
            $this->username,
            $this->password,
            $this->isActive
            // see section on salt below
            // $this->salt,
        ));
    }

    /** @see \Serializable::unserialize() */
    public function unserialize($serialized)
    {
        list (
            $this->id,
            $this->username,
            $this->password,
            $this->isActive
            // see section on salt below
            // $this->salt
            ) = unserialize($serialized, ['allowed_classes' => false]);
    }

    public function isAccountNonExpired()
    {
        return true;
    }

    public function isAccountNonLocked()
    {
        return true;
    }

    public function isCredentialsNonExpired()
    {
        return true;
    }

    public function isEnabled()
    {
        return $this->isActive;
    }

    public function getUserDetails(): ?UserDetails
    {
        return $this->userDetails;
    }

    public function setUserDetails(UserDetails $userDetails): self
    {
        $this->userDetails = $userDetails;

        // set the owning side of the relation if necessary
        if ($this !== $userDetails->getUser()) {
            $userDetails->setUser($this);
        }

        return $this;
    }

    /**
     * @return Collection|Assignment[]
     */
    public function getAssignments(): Collection
    {
        return $this->assignments;
    }

    public function addAssignment(Assignment $assignment): self
    {
        if (!$this->assignments->contains($assignment)) {
            $this->assignments[] = $assignment;
            $assignment->addUser($this);
        }

        return $this;
    }

    public function removeAssignment(Assignment $assignment): self
    {
        if ($this->assignments->contains($assignment)) {
            $this->assignments->removeElement($assignment);
            $assignment->removeUser($this);
        }

        return $this;
    }
}

我提交表单时收到以下错误消息：

使用params [“sanderbakker”，“$ 2y $ 13 $ evlC1NcG9BIdgeBRuBqCKu4uqt4Edsp24SEUIiYF3vg6rp0tEhHdm”执行'INSERT INTO Users（用户名，密码，电子邮件，is_active，角色）VALUES（？，？，？，？，？）'时出现异常，“sander @ crmfabriek.nl“，1，”a：1：{i：0; s：10：\“ROLE_ADMIN \”;}“]：

SQLSTATE [23000]：完整性约束违规：1062重复条目'sanderbakker'用于密钥'UNIQ_D5428AEDF85E0677'

如果我只使用一个属性作为约束，则不会出现此错误。例如，仅用户名属性或电子邮件属性

Answer 1

这正是“UniqueEntity”约束的工作原理。它添加了对用户名和电子邮件组合的控制，如果您尝试插入包含已存在于表中的电子邮件和用户名的记录，则orm会引发异常。您可以在刷新之前检查组合是否已经存在，或者，如果您愿意，可以处理您可以将刷新操作插入到这样的try / catch块中

try {
    $em->flush();
} catch (Doctrine\DBAL\Exception\UniqueConstraintViolationException $e) {
    // handle it here maybe returning an error to the UI
}