根据 symfony2 网站教程中的示例，我正在使用与学说相关的文件上传的标准实现。
当我的上传表单在验证中遇到错误并将用户发送回带有错误消息的表单时，它会丢失选择上传的文件，尽管如果我 var_dump 我的 $entity->file 我可以看到它有文件.. .
//if form is valid, do some stuff... if not:
else {
//var_dump($entity->file); //This works, I get my file
//die;
//Get and check the folder chosen as parent
$entity->setFolder( $this->checkFolderId($request->request->get('folder')) ); //will cause die() if folder doesn't belong to this company
$folders = $this->getFolders();
return $this->render('BizTVMediaManagementBundle:Image:new.html.twig', array(
'entity' => $entity,
'form' => $form->createView(),
'folders' => $folders,
'fileExists' => $fileExists,
));
}
将其放入树枝视图后，文件字段中没有任何内容。
这是我的实体...
<?php
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
*/
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;
/**
* @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="6000000")
*/
public $file;
/**
* @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';
}
/**
* 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 $this->folder;
}
}
和形式：
<?php
namespace BizTV\MediaManagementBundle\Form;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;
class ImageType extends AbstractType
{
function __construct($createAction=0) {
$this->createAction = $createAction;
}
public function buildForm(FormBuilder $builder, array $options)
{
$createAction = $this->createAction;
if ($createAction) {
$builder
->add('file')
;
}
$builder
->add('name', 'text', array('label' => 'Namn'))
;
}
public function getName()
{
return 'biztv_mediamanagementbundle_imagetype';
}
}