无法使用TWIG和Symfony 2、FOSUserBundle从app.user的用户表中检索所有字段

我目前正在制作一个网站,我有一个实体User,它有几个字段。但当我试图检索登录的当前用户时,它只检索用户名。

UserType中的字段如下:

public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('email')
            ->add('name')
            ->add('building')
            ->add('room')
        ;
    }

我使用这个html代码和TWIG来检索字段:

<table class="table table-striped">
        <thead>
            <tr>
                <th>Name</th>
                <th>Building</th>
                <th>Room Number</th>
                <th>Email</th>
            </tr>
        </thead>
        <tbody>
            <tr>
                <td>{{ app.user.name }}</td>
                <td>{{ app.user.building }}</td>
                <td>{{ app.user.room }}</td>
                <td>{{ app.user.email }}</td>
            </tr>
        </tbody>
    </table>

但当我在浏览器中查看表时,我只会在表中填充电子邮件字段?

用户实体:

<?php

namespace FYProject\ProjectBundle\Entity;

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

/**
 *
 * @ORM\Entity
 * @ORM\Table(name="fyp_user")
 */

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

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

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

    /**
     * @var string
     */
    protected $name;

    /**
     * @var string
     */
    protected $lastname;

    /**
     * @var string
     */
    protected $school;


    /**
     * @var string
     */
    protected $qualification;

    /**
     * @var string
     */
    protected $modeofstudy;

    /**
     * @var string
     */
    protected $programmecode;

    /**
     * @var integer
     */
    protected $programmeyear;

    /**
     * @var datetime
     */
    protected $startdate;

    /**
     * @var string
     */
    protected $building;

    /**
     * @var integer
     */
    protected $room;


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

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

        return $this;
    }

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

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

        return $this;
    }

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

    /**
     * Set name
     *
     * @param string $name
     * @return Entity
     */
    public function setName($name)
    {
        $this->name = $name;

        return $this;
    }

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


    /**
     * Set school
     *
     * @param string $school
     * @return Entity
     */
    public function setSchool($school)
    {
        $this->school = $school;

        return $this;
    }

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

    /**
     * set qualification
     *
     * @param string qualification
     * @return Entity
     */
    public function setQualification($qualification){

        $this->qualification = $qualification;
        return $this;
    }

    /**
     * get qualification
     *
     * @return string
     */
    public function getQualification(){

        return $this->qualification;
    }

    /**
     * set modeofstudy
     *
     * @param string modeofstudy
     * @return Entity
     */
    public function setModeofstudy($modeofstudy){

        $this->modeofstudy = $modeofstudy;
        return $this;
    }

    /**
     * get modeofstudy
     *
     * @return string
     */
    public function getModeofstudy(){

        return $this->modeofstudy;
    }

    /**
     * set programmecode
     *
     * @param string programmecode
     * @return Entity
     */
    public function setProgrammecode($programmecode){

        $this->programmecode = $programmecode;
        return $this;
    }

    /**
     * get programmecode
     *
     * @return string
     */
    public function getProgrammecode(){

        return $this->programmecode;
    }

    /**
     * set programmeyear
     *
     * @param integer programmeyearn
     * @return Entity
     */
    public function setProgrammeyear($programmeyear){

        $this->programmecode = $programmeyear;
        return $this;
    }

    /**
     * get programmecode
     *
     * @return integer
     */
    public function getProgrammeyear(){

        return $this->programmeyear;
    }

    /**
     * set startdate
     *
     * @param datetime startdate
     * @return Entity
     */
    public function setStartdate($startdate){

        $this->startdate = $startdate;
        return $this;
    }

    /**
     * get startdate
     *
     * @return datetime
     */
    public function getStartdate(){

        return $this->startdate;
    }

    /**
     * set lastname
     *
     * @param string lastname
     * @return Entity
     */
    public function setLastname($lastname){

        $this->lastname = $lastname;
        return $this;
    }

    /**
     * get lastname
     *
     * @return string
     */
    public function getLastname(){

        return $this->lastname;
    }

    /**
     * set building
     * @param string building
     * @return Entity
     */
    public function setBuilding($building){

        $this->building = $building;
        return $this;
    }

    /**
     * get building
     *
     * @return string
     */
    public function getBuilding(){

        return $this->building;
    }

    /**
     * set room
     * @param integer room
     * @return Entity
     */
    public function setRoom($room){

        $this->room = $room;
        return $this;
    }

    /**
     * get room
     *
     * @return integer
     */
    public function getRoom(){

        return $this->room;
    }

    public function __construct(){

        parent::__construct();
    }
}

注册当前字段时,使用dump(app.user)返回null:

 User {#306 ▼
  #id: 9
  #name: null
  #lastname: null
  #school: null
  #qualification: null
  #modeofstudy: null
  #programmecode: null
  #programmeyear: null
  #startdate: null
  #building: null
  #room: null