Symfony2应用程序中的图像类处理

Question

我在应用程序上编辑配置文件时遇到问题，因为图像字段正在返回此错误：

  

类型为“string或Symfony \ Component \ Form \ FormTypeInterface”，“MainBundle \ Entity \ Image”的预期参数

这是我的RegistrationEditFormType类：

class RegistrationEditFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('lastName', 'text')
            ->add('firstName', 'text')
            ->add('email', 'email', array('label' => 'form.email', 'translation_domain' => 'FOSUserBundle'))
            ->add('phone', 'text')
            ->add('amount', 'money')
            ->add('image',        new \MainBundle\Entity\Image(), array(
            'required' => false,
                'data_class' => null
                )
            )
        ;
    }

/**
 * @param OptionsResolverInterface $resolver
 */
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
    $resolver->setDefaults(array(
        'data_class' => 'UserBundle\Entity\User'
    ));
}

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

}

以前我试过：

->add('image',        ImageType::class, array(
            'required' => false,
                'data_class' => null
            )
        )

并收到此错误：

  

“MainBundle \ Entity \ Image”类型的预期参数，“array”给出

其他信息：

class ImageType extends AbstractType
{
    /**
     * @param FormBuilderInterface $builder
     * @param array $options
     */
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder

            ->add('file', 'file', array('data_class' => null))
        ;
    }

    /**
     * @param OptionsResolverInterface $resolver
     */
    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'data_class' => 'MainBundle\Entity\Image'
        ));
    }

    /**
     * @return string
     */
    public function getName()
    {
        return 'lldcontribution_mainbundle_image';
    }
}

使用以下形式的控制器的操作：

/**
 * Edit the user
 */
public function editAction($id)
{
    //die('ok');
    //$user = $this->getUser();

    //$id = $request->request->get('id');



    $user = $this
        ->getDoctrine()
        ->getManager()
        ->getRepository('UserBundle:User')
        ->find($id)
    ;

    $request = $this->getRequest();

    if (!is_object($user) || !($user instanceof UserInterface)) {
        throw new AccessDeniedException('This user does not have access to this section.');
    }

    /** @var $dispatcher \Symfony\Component\EventDispatcher\EventDispatcherInterface */
    $dispatcher = $this->get('event_dispatcher');

    $event = new GetResponseUserEvent($user, $request);
    $dispatcher->dispatch(FOSUserEvents::PROFILE_EDIT_INITIALIZE, $event);

    if (null !== $event->getResponse()) {
        return $event->getResponse();
    }

    /** @var $formFactory \FOS\UserBundle\Form\Factory\FactoryInterface */
    //$formFactory = $this->get('fos_user.profile.form.factory');

    //$form = $formFactory->createForm();

    $form = $this->createForm(new RegistrationEditFormType(), $user);
    //$form->setData($user);

    $form->handleRequest($request);

    if ($form->isValid()) {


        /** @var $userManager \FOS\UserBundle\Model\UserManagerInterface */
        $userManager = $this->get('fos_user.user_manager');

        $amount = $request->request->get('amount');

        $user->setEmail($request->request->get('email'));
        $user->setFirstName($request->request->get('firstName'));
        $user->setLastName($request->request->get('lastName'));
        $user->setPhone($request->request->get('phone'));
        $user->setAmount($request->request->get('amount'));
        $user->setUpdatedAt(new \DateTime());

        //var_dump($user);die();

        // Updating the user
        $userManager->updateUser($user);

        $event = new FormEvent($form, $request);
        $dispatcher->dispatch(FOSUserEvents::PROFILE_EDIT_SUCCESS, $event);

        //$userManager->updateUser($user);

        if (null === $response = $event->getResponse()) {
            $url = $this->generateUrl('lld_admin');
            $response = new RedirectResponse($url);
        }

        $dispatcher->dispatch(FOSUserEvents::PROFILE_EDIT_COMPLETED, new FilterUserResponseEvent($user, $request, $response));

        return $response;
    }
    $request->getSession()->getFlashBag()->add('info-edit', 'Your account has been updated!');
    return $this->render('UserBundle:Profile:edit.html.twig', array(
        'form' => $form->createView(),
        'user' => $user
    ));
}

我正在使用Symfony2.8和PHP 5.6。我被困住了，不知道出了什么问题，特别是因为我习惯使用我的Image类而没有任何问题。我错过了什么？有什么建议吗？