唯一约束不适用于symfony 2

Question

我遇到了唯一约束验证问题。

这是我的用户类

ul#navmenu {
    width: 645px;
    margin: 0px auto;
}


ul#navmenu, ul.sub1, ul.sub2 {
    list-style-type: none;
    font-size: 9pt;    
    }

ul#navmenu li {
    width: 125px;
    text-align: center;
    position: relative;
    float: left;
    margin-right: 4px;
    }

ul#navmenu a {
    text-decoration: none;
    display: block;
    width: 125px;
    height: 25px;
    line-height: 25px;
    background-color: blue;
    color:#fff;
    border: 1px solid #CCC;
    border-radius: 5px;
    }

ul#navmenu .sub1 li a,
ul#navmenu .sub2 li a
 { 
    background:#fff; 
    color:#000;
}

ul#navmenu .sub1 li {
    }

ul#navmenu .sub1 a {
    margin-top: 5px;
    }

ul#navmenu .sub2 a {
    margin-left: 3px;
    }

ul#navmenu li:hover > a {
    background-color: #CFC;
    }

ul#navmenu li:hover a:hover {
    background-color: #FF0;
    }

ul#navmenu ul.sub1 {
    display: none;
    position: absolute;
    top: 26px;
    left: 0px;
    }

ul#navmenu ul.sub2 {
    display: none;
    position: absolute;
    top: 0px;
    left: 126px;
    }

ul#navmenu li:hover .sub1 {
    display: block;
    }

ul#navmenu .sub1 li:hover .sub2 {
    display: block;
    }

这是我的教条

的YAML文件

    <?php

namespace Uber\UberGamesBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Security\Core\User\UserInterface;
/**
 * User
 */
class User implements UserInterface, \Serializable
{
    /**
     * @var integer
     */
    private $id;

    /**
     * @var string
     */
    private $username;

    /**
     * @var string
     */
    private $email;

    /**
     * @var string
     */
    private $password;

    /**
     * @var \DateTime
     */
    private $fechaInscripcion;

    /**
     * @var boolean
     */
    private $esAdministrador;

    private $isActive;


    public function __construct()
    {
        $this->isActive = true;
    }

    public function getSalt()
    {
        // you *may* need a real salt depending on your encoder
        // see section on salt below
        return null;
    }



    public function eraseCredentials()
    {
    }

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

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

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

    /**
     * Set username
     *
     * @param string $username
     * @return User
     */
    public function setUsername($username)
    {
        $this->username = $username;

        return $this;
    }

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

    /**
     * Set email
     *
     * @param string $email
     * @return User
     */
    public function setEmail($email)
    {
        $this->email = $email;

        return $this;
    }

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

    /**
     * Set password
     *
     * @param string $password
     * @return User
     */
    public function setPassword($password)
    {
        $this->password = $password;

        return $this;
    }

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

    /**
     * Set fechaInscripcion
     *
     * @param \DateTime $fechaInscripcion
     * @return User
     */
    public function setFechaInscripcion($fechaInscripcion)
    {
        $this->fechaInscripcion = $fechaInscripcion;

        return $this;
    }

    /**
     * Get fechaInscripcion
     *
     * @return \DateTime 
     */
    public function getFechaInscripcion()
    {
        return $this->fechaInscripcion;
    }

    /**
     * Set esAdministrador
     *
     * @param boolean $esAdministrador
     * @return User
     */
    public function setEsAdministrador($esAdministrador)
    {
        $this->esAdministrador = $esAdministrador;

        return $this;
    }

    /**
     * Get esAdministrador
     *
     * @return boolean 
     */
    public function getEsAdministrador()
    {
        return $this->esAdministrador;
    }

    /**
     * Set isActive
     *
     * @param boolean $isActive
     * @return User
     */
    public function setIsActive($isActive)
    {
        $this->isActive = $isActive;

        return $this;
    }

    /**
     * Get isActive
     *
     * @return boolean 
     */
    public function getIsActive()
    {
        return $this->isActive;
    }

    public function getRoles()
    {
        $roles = array('ROLE_USER');
        if($this->getEsAdministrador())
        {
            $roles[] = 'ROLE_ADMIN';
        }
        return $roles;
    }
}

但我无法使用户名和电子邮件变得独一无二。 添加具有相同用户名或电子邮件的用户甚至不会引发数据库异常。 symfony2和bundle更新了，架构也是如此。

（我知道其他主题的细节必须在此代码中予以纠正，即使我可以使用捆绑包，但请让我们专注于独特的问题:)）