Symfony 2.2上传文件

Question

我上传Symfony2文件已经有一段时间了，似乎所有内容都已更改，请按照How to handle File Uploads with Doctrine中的指南进行操作，但已过时并且不工作。

当我尝试绑定的形式得到了错误

Catchable Fatal Error: Argument 1 passed to Entity\Portada::setFile() must be an instance of Symfony\Component\HttpFoundation\File\UploadedFile, string given, ... 

这是我的控制器

/** 
* @Route("/upload", name="documento_upload") 
* @Method("POST") 
* @Template() 
*/ 
public function uploadAction(Request $request) 
{ 
    $portada = new Portada(); 
    $form = $this->buildUploadForm($portada); 
    $form->bind($request); 

    if ($form->isValid()) { 
     $portada->upload(); 
    } else { 
     throw new \Exception("Hay un error en el formulario"); 

    } 

    //... 
} 

我的实体

<?php 

namespace MyName\MyBundle\Entity; 

use Doctrine\ORM\Mapping as ORM; 
use Symfony\Component\HttpFoundation\File\UploadedFile; 
use Symfony\Component\Validator\Constraints as Assert; 

class Portada 
{ 
    /** 
    * @Assert\File(maxSize="6000000") 
    */ 
    private $file; 

    public $path; 

    /** 
    * Sets file. 
    * 
    * @param UploadedFile $file 
    */ 
    public function setFile(UploadedFile $file = null) 
    { 
     $this->file = $file; 
    } 

    public function upload() 
    { 
     $this->path = $this->getFile()->getClientOriginalName(); 

     $this->getFile()->move(
      $this->getUploadRootDir(), 
      $this->path 
     ); 

     $this->file = null; 
    } 

    /** 
    * Get file. 
    * 
    * @return UploadedFile 
    */ 
    public function getFile() 
    { 
     return $this->file; 
    } 

    public function getAbsolutePath() 
    { 
     return null === $this->path 
      ? null 
      : $this->getUploadRootDir() . DIRECTORY_SEPARATOR . $this->path; 
    } 

    public function getWebPath() 
    { 
     return null === $this->path 
      ? null 
      : $this->getUploadDir() . DIRECTORY_SEPARATOR . $this->path; 
    } 

    protected function getUploadRootDir() 
    { 
     return __DIR__ . '/../../../../web/'. $this->getUploadDir(); 
    } 

    protected function getUploadDir() 
    { 
     return 'uploads/portada'; 
    } 
} 

Answer 1

我忘记之后添加的enctype到我的形式完美添加作品

<form action="{{ path('documento_upload') }}" method="post" {{ form_enctype(upload_form) }}> 
    {{ form_widget(upload_form) }} 
    <button type="submit" class="btn btn-primary">Upload</button> 
</form>