我正在使用与doctrine相关的文件上传的标准实现，根据symfony2网站教程中的示例。
当我的上传表单在验证中遇到错误，并将用户返回到包含错误消息的表单时，它会丢失选择上传的文件，但如果我var_dump my $ entity-＆gt;文件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 $this->folder;
}
}
形式：
<?php
namespace BizTV\MediaManagementBundle\Form;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;
class ImageType extends AbstractType
{
function __construct($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';
}
}
答案 0 :(得分：5)
出于安全考虑，您不能为上传字段设置文件。有关详细信息，请参见此处How to set the value of a HTML file field?
答案 1 :(得分：0)
我建议您尝试在树枝中访问实体的文件属性。请快速查看您的上传功能。
/**
* @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);
}
正如您所看到的，在上传和保持操作完成后，文件属性未被设置。
现在要让树枝显示您的实际图像，您必须使用 webPath 属性，因为这是您新上传图片的生成网址。
使用Dustin10/VichUploaderBundle进行文件系统抽象的KnpLabs/Gaufrette可以更轻松地处理文件上传。
希望这会有所帮助：）