因为我有一个自定义的jQuery插件来传递文件上传到我的Symfony2 Web应用程序，所以我正在寻找处理控制器中的上传的方法。
我目前拥有的标准（非ajax）文件上传（对于同步调用工作正常）看起来像这样：
控制器摘录
...
$entity = new Image();
$request = $this->getRequest();
$form = $this->createForm(new ImageType($createAction), $entity);
$form->bind($request); // <-- Find a way to make this connection manually?!
//check that a file was chosen
$fileExists = isset($entity->file);
if ( ($form->isValid()) && ($fileExists) ) {
$em = $this->getDoctrine()->getManager();
$em->persist($entity);
$em->flush();
}
...
表单类型: 这个表单只需要上传文件和文件名：
class ImageType extends AbstractType
{
...
public function buildForm(FormBuilderInterface $builder, array $options)
{
$createAction = $this->createAction;
if ($createAction) {
$builder
->add('file')
;
}
$builder
->add('name', 'text', array('label' => 'Namn'))
;
}
...
}
据我理解（或者说显然我没有理解），使用Symfony2和Doctrine的文件上传系统在调用过程中有很多神奇的操作。
$form->bind($request);
例如，如果我跳过这个bind()方法，而是手动创建图像实体，像这样...
$request = $this->getRequest();
$parent = $request->request->get('parent');
$file = $request->request->get('file1');
$name = $request->request->get('name');
$entity->setName( $name );
$entity->setFile( $file );
$entity->setFolder( null );
我发现它甚至没有setFile()函数，所以需要通过其他方式解决。这是那个图片实体：
namespace BizTV\MediaManagementBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
/**
* BizTV\MediaManagementBundle\Entity\Image
*
* @ORM\Table(name="image")
* @ORM\Entity
* @ORM\HasLifecycleCallbacks
*/
class Image
{
/**
* @var integer $id
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* @var string $name
*
* @ORM\Column(name="name", type="string", length=255)
* @Assert\NotBlank(message = "Bilden måste ha ett namn")
*/
private $name;
/**
* @var integer $width
*
* @ORM\Column(name="width", type="integer")
*/
private $width;
/**
* @var integer $height
*
* @ORM\Column(name="height", type="integer")
*/
private $height;
/**
* @ORM\Column(type="string", length=255, nullable=true)
*/
private $path;
//The deleteRequested variable is to flag that an image has been deleted by user.
//Due to slideshow issues we can however not delete the image right away, we can't risk to remove it from the
//cache manifest before the slideshow round is up.
/**
* @var time $deleteRequested
*
* @ORM\Column(name="delete_requested", type="datetime", nullable=true)
*/
private $deleteRequested;
/**
* @var object BizTV\BackendBundle\Entity\company
*
* @ORM\ManyToOne(targetEntity="BizTV\BackendBundle\Entity\company")
* @ORM\JoinColumn(name="company", referencedColumnName="id", nullable=false)
*/
protected $company;
/**
* @var object BizTV\MediaManagementBundle\Entity\Folder
*
* @ORM\ManyToOne(targetEntity="BizTV\MediaManagementBundle\Entity\Folder")
* @ORM\JoinColumn(name="folder", referencedColumnName="id", nullable=true)
*/
protected $folder;
/**
* @Assert\File(maxSize="12000000")
*/
public $file;
/**
* @ORM\OneToOne(targetEntity="BizTV\MediaManagementBundle\Entity\QrImage", mappedBy="image")
*/
protected $qr;
/**
* @ORM\PrePersist()
* @ORM\PreUpdate()
*/
public function preUpload()
{
if (null !== $this->file) {
// do whatever you want to generate a unique name
$this->path = sha1(uniqid(mt_rand(), true)).'.'.$this->file->guessExtension();
}
}
/**
* @ORM\PostPersist()
* @ORM\PostUpdate()
*/
public function upload()
{
if (null === $this->file) {
return;
}
// if there is an error when moving the file, an exception will
// be automatically thrown by move(). This will properly prevent
// the entity from being persisted to the database on error
$this->file->move($this->getUploadRootDir(), $this->path);
unset($this->file);
}
/**
* @ORM\PostRemove()
*/
public function removeUpload()
{
if ($file = $this->getAbsolutePath()) {
unlink($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/'.$this->getUploadDir();
}
protected function getUploadDir()
{
// get rid of the __DIR__ so it doesn't screw when displaying uploaded doc/image in the view.
return 'uploads/images/'.$this->getCompany()->getId();
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* @param string $name
*/
public function setName($name)
{
$this->name = $name;
}
/**
* Get name
*
* @return string
*/
public function getName()
{
return $this->name;
}
/**
* Set width
*
* @param integer $width
*/
public function setWidth($width)
{
$this->width = $width;
}
/**
* Get width
*
* @return integer
*/
public function getWidth()
{
return $this->width;
}
/**
* Set height
*
* @param integer $height
*/
public function setHeight($height)
{
$this->height = $height;
}
/**
* Get height
*
* @return integer
*/
public function getHeight()
{
return $this->height;
}
/**
* Set path
*
* @param string $path
*/
public function setPath($path)
{
$this->path = $path;
}
/**
* Get path
*
* @return string
*/
public function getPath()
{
return $this->path;
}
/**
* Set company
*
* @param BizTV\BackendBundle\Entity\company $company
*/
public function setCompany(\BizTV\BackendBundle\Entity\company $company)
{
$this->company = $company;
}
/**
* Get company
*
* @return BizTV\BackendBundle\Entity\company
*/
public function getCompany()
{
return $this->company;
}
/**
* Set folder
*
* @param BizTV\MediaManagementBundle\Entity\Folder $folder
*/
public function setFolder(\BizTV\MediaManagementBundle\Entity\Folder $folder = NULL)
{
$this->folder = $folder;
}
/**
* Get folder
*
* @return BizTV\MediaManagementBundle\Entity\Folder
*/
public function getFolder()
{
return $this->folder;
}
/**
* Set qr
*
* @param BizTV\MediaManagementBundle\Entity\QrImage $qr
*/
public function setQr(\BizTV\MediaManagementBundle\Entity\QrImage $qr = null)
{
$this->qr = $qr;
}
/**
* Get qr
*
* @return BizTV\MediaManagementBundle\Entity\QrImage
*/
public function getQr()
{
return $this->qr;
}
/**
* Set deleteRequested
*
* @param date $deleteRequested
*/
public function setDeleteRequested($deleteRequested = null)
{
$this->deleteRequested = $deleteRequested;
}
/**
* Get deleteRequested
*
* @return date
*/
public function getDeleteRequested()
{
return $this->deleteRequested;
}
}