Php Symfony2 Uniquentity不工作：引发数据库异常

我有一个用户类，如下所示：

/**
* User
*
* @ORM\Table()
* @ORM\Entity
* @UniqueEntity("username")
*/
class User implements UserInterface
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;

/**
 * @var string
 *
 * @ORM\Column(name="username", type="string", length=30, unique=true)
 */
private $username;
...

正如您所猜测的，我希望保持用户名的唯一性。当我尝试注册一个与以前的用户名重复的新用户时，我得到一个db异常：

An exception occurred while executing 'INSERT INTO User (username, hashedpassword, email) VALUES (?, ?, ?)' with params ["xx", "$2y$10$7rrY0tw0eG8ui7hRkpGI..8Wf16DP1fQMLymaOmHnbZsBw6M1uY.i", "ddsds@u.com"]:

SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry 'xx' for key 'UNIQ_2DA17977F85E0677' 

我想问题可能出在我的注册控制器上。我正在使用上给出的那个

相关位：

class AccountController extends Controller
{
public function registerAction()
{
    $registration = new Registration();
    $form = $this->createForm(new RegistrationType(), $registration, array(
        'action' => $this->generateUrl('account_create'),
    ));

    return $this->render(
        'RezialRezialBundle:Account:register.html.twig',
        array('form' => $form->createView())
    );
}


public function createAction(Request $request)
{
$em = $this->getDoctrine()->getManager();

$form = $this->createForm(new RegistrationType(), new Registration());

$form->handleRequest($request);

if ($form->isValid()) {
    $registration = $form->getData();

    //should I manually check for unicity here?


    $em->persist($registration->getUser());
    $em->flush();

    //The following 3 lines make the user automatically login
    //upon successfull registration!
    $user = $registration->getUser();
    $token = new UsernamePasswordToken($user, null, 'main', $user->getRoles());
    $this->get('security.token_storage')->setToken($token);

    return $this->redirectToRoute('homepage');
}

return $this->render(
    'RezialRezialBundle:Account:register.html.twig',
    array('form' => $form->createView())
);
}

}

有什么想法吗？

您没有忘记注册类的$user属性上的@Assert\Valid（）注释吗

此约束用于对以下对象启用验证： 作为属性嵌入到正在验证的对象上。这允许你 验证对象及其关联的所有子对象

链接：

试试这个：

use Doctrine\ORM\Mapping as ORM;
use Symfony\Bridge\Doctrine\Validator\Constraints\UniqueEntity;

/**
 * @ORM\Entity
 * @ORM\Table(name="user")
 * @UniqueEntity(fields="username", message="Username is already taken.")
 */
class User
{
    /**
     * @ORM\Column(name="username", type="string", length=30, unique=true)
     */
    protected $username;
}

---

我已经忘了，现在才加上。但是，还是一样的db例外：（啊！真不敢相信。它很管用，老兄！我第一次试着在第一条评论行键入/*而不是/**。显然这很重要。哈哈。谢谢！