在Symfony2中使用上传的图像更新用户配置文件

我有一个允许用户上传和保存头像的用户配置文件。

我有一个UserProfile实体和一个Document实体:

实体/UserProfile.php

namespace Acme'AppBundle'Entity'Profile;
use Doctrine'ORM'Mapping as ORM;
/**
 * @ORM'Entity
 * @ORM'Table(name="ISUserProfile")
 */
class UserProfile extends GenericProfile
{
    /**
     * @ORM'OneToOne(cascade={"persist", "remove"}, targetEntity="Acme'AppBundle'Entity'Document")
     * @ORM'JoinColumn(name="picture_id", referencedColumnName="id", onDelete="set null")
     */
    protected $picture;
    /**
     * Set picture
     *
     * @param Acme'AppBundle'Entity'Document $picture
     */
    public function setPicture($picture)
    {
        $this->picture = $picture;
    }
    /**
     * Get picture
     *
     * @return Acme'AppBundle'Entity'Document
     */
    public function getPicture()
    {
        return $this->picture;
    }
}

实体/Document.php

namespace Acme'AppBundle'Entity;
use Doctrine'ORM'Mapping as ORM;
use Symfony'Component'HttpFoundation'File'UploadedFile;
use Symfony'Component'Validator'Constraints as Assert;
/**
 * @ORM'Entity
 * @ORM'HasLifecycleCallbacks
 */
class Document
{
    /**
     * @ORM'Id
     * @ORM'Column(type="integer")
     * @ORM'GeneratedValue(strategy="AUTO")
     */
    private $id;
    /**
     * @ORM'Column(type="string", length=255, nullable=true)
     */
    private $path;
    /**
     * @Assert'File(maxSize="6000000")
     */
    private $file;

    public function getAbsolutePath()
    {
        return null === $this->path ? null : $this->getUploadRootDir().'/'.$this->path;
    }
    public function getWebPath()
    {
        return null === $this->path ? null : $this->getUploadDir().'/'.$this->path;
    }
    protected function getUploadRootDir()
    {
        // the absolute directory path where uploaded documents should be saved
        return __DIR__.'/../../../../web/'.$this->getUploadDir();
    }
    protected function getUploadDir()
    {
        // get rid of the __DIR__ so it doesn't screw when displaying uploaded doc/image in the view.
        return 'uploads/documents';
    }
    /**
     * @ORM'PrePersist()
     * @ORM'PreUpdate()
     */
    public function preUpload()
    {
        if (null !== $this->file) {
            $this->path = sha1(uniqid(mt_rand(), true)).'.'.$this->file->guessExtension();
        }
    }
    /**
     * @ORM'PostPersist()
     * @ORM'PostUpdate()
     */
    public function upload()
    {
        if (null === $this->file) {
            return;
        }
        $this->file->move($this->getUploadRootDir(), $this->path);
        unset($this->file);
    }
    /**
     * @ORM'PostRemove()
     */
    public function removeUpload()
    {
        if ($file = $this->getAbsolutePath()) {
            unlink($file);
        }
    }
    /**
     * Get id
     *
     * @return integer
     */
    public function getId()
    {
        return $this->id;
    }
    /**
     * Set path
     *
     * @param string $path
     */
    public function setPath($path)
    {
        $this->path = $path;
    }
    /**
     * Get path
     *
     * @return string
     */
    public function getPath()
    {
        return $this->path;
    }
    /**
     * Set file
     *
     * @param string $file
     */
    public function setFile($file)
    {
        $this->file = $file;
    }
    /**
     * Get file
     *
     * @return string
     */
    public function getFile()
    {
        return $this->file;
    }
}

我的用户配置文件表单类型添加了一个文档表单类型，以便在用户配置文件页面上包含文件上传器:

形式/UserProfileType.php

namespace Acme'AppBundle'Form;
use Symfony'Component'Form'FormBuilderInterface;
use Symfony'Component'OptionsResolver'OptionsResolverInterface;
class UserProfileType extends GeneralContactType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
    parent::buildForm($builder, $options);
    /*
    if(!($pic=$builder->getData()->getPicture()) || $pic->getWebPath()==''){
      $builder->add('picture', new DocumentType());
    }
    */
    $builder
      ->add('picture', new DocumentType());
      //and add some other stuff like name, phone number, etc
    }
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
      'data_class' => 'Acme'AppBundle'Entity'Profile'UserProfile',
      'intention'  => 'user_picture',
      'cascade_validation' => true,
        ));
    }

    public function getName()
    {
        return 'user_profile_form';
    }
}

形式/DocumentType.php

namespace Acme'AppBundle'Form;
use Symfony'Component'Form'AbstractType;
use Symfony'Component'Form'FormBuilderInterface;
use Symfony'Component'OptionsResolver'OptionsResolverInterface;
class DocumentType extends AbstractType
{
        public function buildForm(FormBuilderInterface $builder, array $options)
        {
                $builder
                        ->add('file')
                        ;
        }
        public function setDefaultOptions(OptionsResolverInterface $resolver)
        {
            $resolver->setDefaults(array(
                    'data_class' => 'Acme'AppBundle'Entity'Document',
            ));
        }
        public function getName()
        {
                return 'document_form';
        }
}

在我的控制器中，我有一个更新配置文件操作:

控制器/ProfileController.php

namespace Acme'AppBundle'Controller;

class AccountManagementController extends BaseController
{
    /**
     * @param Symfony'Component'HttpFoundation'Request
     * @return Symfony'Component'HttpFoundation'Response
     */
    public function userProfileAction(Request $request) {
        $user = $this->getCurrentUser();
        $entityManager = $this->getDoctrine()->getEntityManager();
        if($user && !($userProfile = $user->getUserProfile())){
            $userProfile = new UserProfile();
            $userProfile->setUser($user);
        }
        $uploadedFile = $request->files->get('user_profile_form');
        if ($uploadedFile['picture']['file'] != NULL) {
                $userProfile->setPicture(NULL);
        }
        $userProfileForm = $this->createForm(new UserProfileType(), $userProfile);
        if ($request->getMethod() == 'POST') {
          $userProfileForm->bindRequest($request);
          if ($userProfileForm->isValid()) {
            $entityManager->persist($userProfile);
            $entityManager->flush();
            $this->get('session')->setFlash('notice', 'Your user profile was successfully updated.');
            return $this->redirect($this->get('router')->generate($request->get('_route')));
          } else {
            $this->get('session')->setFlash('error', 'There was an error while updating your user profile.');
          }
        }
        $bindings = array(
          'user_profile_form' => $userProfileForm->createView(),
        );
        return $this->render('user-profile-template.html.twig', $bindings);
    }
}

现在，这段代码工作了…但它丑得要命。为什么我必须检查上传文件的请求对象并将图片设置为null，以便Symfony意识到它需要持久化一个新的文档实体?

当然有一个简单的用户配置文件页面与选项上传图像作为个人资料图片应该比这更简单?

我错过了什么??