我有一个 Symfony2 表单，我想向其中添加文件上传对话框。
根据 Symfony 文档（http://symfony.com/doc/2.0/cookbook/doctrine/file_uploads.html），我创建了一个 Document 类：
<?php
namespace Acme\AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\HttpFoundation\File\UploadedFile;
use Symfony\Component\Validator\Constraints as Assert;
/**
* @ORM\Entity
* @ORM\HasLifecycleCallbacks
*/
class Document
{
/**
* @ORM\Id
* @ORM\Column(type="integer")
* @ORM\GeneratedValue(strategy="AUTO")
*/
public $id;
/**
* @ORM\Column(type="string", length=255, nullable=true)
*/
public $path;
/**
* @Assert\File(maxSize="6000000")
*/
public $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/documents';
}
/**
* @ORM\PrePersist()
* @ORM\PreUpdate()
*/
public function preUpload()
{
if (null !== $this->file) {
$this->path = sha1(uniqid(mt_rand(), true)).'.'.$this->file->guessExtension();
}
}
/**
* @ORM\PostPersist()
* @ORM\PostUpdate()
*/
public function upload()
{
if (null === $this->file) {
return;
}
$this->file->move($this->getUploadRootDir(), $this->path);
unset($this->file);
}
/**
* @ORM\PostRemove()
*/
public function removeUpload()
{
if ($file = $this->getAbsolutePath()) {
unlink($file);
}
}
/**
* Get id
*
* @return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set path
*
* @param string $path
*/
public function setPath($path)
{
$this->path = $path;
}
/**
* Get path
*
* @return string
*/
public function getPath()
{
return $this->path;
}
}
还有一个 DocumentType 表单类：
<?php
namespace Acme\AppBundle\Form;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
class DocumentType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('file')
;
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'Acme\AppBundle\Entity\Document',
));
}
public function getName()
{
return 'document_form';
}
}
但是，当我将其添加到现有实体和表单类时：
<?php
namespace Acme\AppBundle\Entity\Profile;
use Doctrine\ORM\Mapping as ORM;
use Acme\AppBundle\Entity\jDocument;
use Symfony\Component\Validator\Constraints as Assert;
/**
* @ORM\Entity
* @ORM\Table(name="UserProfile")
*/
class UserProfile extends GenericProfile
{
//... Other entity params
/**
* @ORM\OneToOne(cascade={"persist", "remove"}, targetEntity="Acme\AppBundle\Entity\Document")
* @ORM\JoinColumn(name="picture_id", referencedColumnName="id", onDelete="set null")
*/
protected $picture;
/**
* Set picture
*
* @param Acme\AppBundle\Entity\Document $picture
*/
//\Acme\AppBundle\Entity\Document
public function setPicture($picture)
{
$this->picture = $picture;
}
/**
* Get picture
*
* @return Acme\AppBundle\Entity\Document
*/
public function getPicture()
{
return $this->picture;
}
//... Other entity getters and setters
}
每当我提交表单时，我都会收到以下错误：
ErrorException: Warning: ini_set(): A session is active. You cannot change the session module's ini settings at this time in /var/www/wolseley-integrated-services/builds/dev/app/cache/prod/classes.php line 421
但是页面标题是“找不到实体。（500 内部服务器错误）”。
谁能发现它找不到哪个实体？或者如果这甚至是问题？
我做了一些谷歌搜索并检查了 session.auto_start 在 php.ini 中设置为 0，我已经清除了所有会话和缓存......我很难过！