Symfony 3.0 错误:由于未知错误，文件“IMG_20160305_155302.jpg”未上传

基于： http://symfony.com/doc/current/cookbook/doctrine/file_uploads.html

我做了一个图像模型：

<?php
namespace AppBundle'Entity;
use Doctrine'ORM'Mapping as ORM;
use Symfony'Component'Validator'Constraints as Assert;
use Symfony'Component'HttpFoundation'File'UploadedFile;
use Symfony'Component'Filesystem'Filesystem;
/**
* @ORM'Entity
* @ORM'Table(name="images")
* @ORM'Entity(repositoryClass="AppBundle'Entity'ImagesRepository")
* @ORM'HasLifecycleCallbacks
*/
class Images
{
    /**
     * @ORM'Column(type="string", length=60)
     * @ORM'Id
     * @ORM'GeneratedValue(strategy="CUSTOM")
     * @ORM'CustomIdGenerator(class="AppBundle'Doctrine'AutoIdGenerate")
     */
    private $id;
    /**
    * Filename of the Image
    * @ORM'Column(type="string", length=100)
    */
    private $name;
    /**
    * Filename of the Thumbnail
    * @ORM'Column(type="string", length=100)
    */
    private $name_small;
    /**
    * ImageGroup og the Image
    * @ORM'ManyToOne(targetEntity="AppBundle'Entity'ImageGroups", inversedBy="images")
    */
    private $group;

    /**
     * @Assert'File(maxSize="20000000")
     */
    private $file;
    private $upload_dir='images';
    private $temp;
    /**
     * Get file.
     *
     * @return UploadedFile
     */
    public function getFile()
    {
        return $this->file;
    }
    /**
     * Sets file.
     *
     * @param UploadedFile $file
     */
    public function setFile(UploadedFile $file,$upload_dir)
    {
        $this->file = $file;
        // check if we have an old image path
        if (isset($this->name))
        {
            // store the old name to delete after the update
            $this->temp = $this->name;
            $this->name = null;
        }
        else
        {
            $this->name = sha1(uniqid(mt_rand(), true)).'.'.$file->guessExtension();
        }
        $this->name_small="small_".$this->name;
        $this->upload_dir=$upload_dir;
        return $this;
    }
    /**
     * @ORM'PrePersist()
     * @ORM'PreUpdate()
     */
    public function preUpload()
    {
        if (null !== $this->getFile())
        {
            // do whatever you want to generate a unique name
            $filename = sha1(uniqid(mt_rand(), true));
            $this->name = $filename.'.'.$this->getFile()->guessExtension();
            $this->name_small='small_'.$this->name;
        }
    }
    public function getUploadRootDir()
    {
      return __DIR__.'/../../../../web/'.$this->upload_dir;
    }
    /**
     * @ORM'PostPersist()
     * @ORM'PostUpdate()
     */
    public function upload()
    {
        if (null === $this->getFile())
        {
            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
        //-- Make the Thumbnail Here --
        $dir=$this->getUploadRootDir();
        echo $dir;
        $fs = new Filesystem();
        if(!$fs->exists($dir))
        {
          echo "'nCreating'n";
          $fs->mkdir($dir,0777,true);
        }
        $this->getFile()->move($dir, $this->name);
        $file=$dir.'/'.$this->name;
        // check if we have an old image
        if (isset($this->temp))
        {
            // delete the old image
            unlink($this->getUploadRootDir().'/'.$this->temp);
            // clear the temp image path
            $this->temp = null;
        }
        $this->file = null;
    }
    /**
     * @ORM'PostRemove()
     */
    public function removeUpload()
    {
        $file = $this->getAbsolutePath();
        if ($file)
        {
            unlink($file);
        }
    }

    /**
     * Get id
     *
     * @return string
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * Get name
     *
     * @return string
     */
    public function getName()
    {
        return $this->name;
    }
    /**
     * Get nameSmall
     *
     * @return string
     */
    public function getNameSmall()
    {
        return $this->name_small;
    }
    /**
     * Set group
     *
     * @param 'AppBundle'Entity'ImageGroups $group
     *
     * @return Images
     */
    public function setGroup('AppBundle'Entity'ImageGroups $group = null)
    {
        $this->group = $group;
        return $this;
    }
    /**
     * Get group
     *
     * @return 'AppBundle'Entity'ImageGroups
     */
    public function getGroup()
    {
        return $this->group;
    }
    /**
     * Set name
     *
     * @param string $name
     *
     * @return Images
     */
    public function setName($name)
    {
        $this->name = $name;
        return $this;
    }
    /**
     * Set nameSmall
     *
     * @param string $nameSmall
     *
     * @return Images
     */
    public function setNameSmall($nameSmall)
    {
        $this->name_small = $nameSmall;
        return $this;
    }
}

我还制作了一个自定义存储库 为了进行上传：

<?php
namespace AppBundle'Entity;
use Doctrine'ORM'EntityRepository;
use Symfony'Component'HttpFoundation'File'UploadedFile;
use AppBundle'Entity'Images;
class ImagesRepository extends EntityRepository
{
  public function add($file,$group_id,$user_id)
  {
    if(empty($group_id)) return -1;
    if(empty($user_id)) return -2;
    /*Do stuff for uploads*/
    /*End of Do stuff for uploads*/

    $em = $this->getEntityManager();
    $imagesGroups = $em->getRepository('AppBundle:ImageGroups')
                       ->getUserImageGroups($user_id,null,$group_id);
    if(empty($imagesGroups) ||(is_int($imagesGroups) && $imagesGroups<0)) return -3; //Null and negative values are false
    if(empty($file)) return -4;
    $image=new Images();
    $image->setFile($file,'images')->setGroup($imagesGroups);
    try
    {
      $em->persist($image);
      $em->flush();
      return ['id'=>$image->getId(),'image'=>$image->getName(),'thumb'=>$image->getNameSmall()];
    }
    catch ('Exception $e)
    {
      echo $e->getMessage();
        return false;
    }
  }
  public function delete($user_id,$image_id)
  {
    if(empty($image_id)) return -1;
    if(empty($user_id)) return -2;
    $em = $this->getEntityManager();
    try
    {
      $q=$em->createQueryBuilder('i')
            ->from('AppBundle:Images','i')
            ->innerJoin('i.group', 'g')
            ->innerJoin('AppBundle:Users','u')
            ->select('i')
            ->where('i.id=:iid')
            ->andWhere('u.id=:uid')
            ->setParameter(':uid', $user_id)
            ->setParameter(':iid', $image_id)
            ->setMaxResults(1)
            ->getQuery();
      $data=$q->getOneOrNullResult();
      if(empty($data)) return -3;
      /*Delete Image Stuff*/
      /*End Of: Delete Image Stuff*/
      $em->remove($data);
      $em->flush();
      return true;
    }
    catch ('Exception $e)
    {
      echo $e->getMessage();
      return false;
    }

  }
}

当我由于某种原因成功执行 POST 操作（我使用 curl 测试上面的代码）时，我收到以下错误：

The file "IMG_20160305_155302.jpg" was not uploaded due to an unknown error.

通过回显异常消息。

我最初认为这是我的文件系统上的权限问题，因此在文件夹/home/pcmagas/Kwdikas/php/apps/symphotest/src/AppBundle/Entity/../../../../web/images

我设置了以下权限：

drwxrwxrwx 2 www-data www-data  4096 Μάρ   5 23:02 images

但这似乎不是问题所在。我想知道还能是什么。我可以有解决方案吗？

编辑 1：我在 php 上检查了upload_max_filesize.ini 并且在 2M 上，我正在上传的文件在 56,0 KB 上。