Файл не найден при использовании LifecycleCallbacks

У меня проблема с form validation в symfony2,

В моем случае $form->isValid() команда приводит к The file could not be found. хотя я и предоставляю файл при заполнении формы

Дополнительно отладка setFile функция в documents entity приводит к выводу, что значение файла установлено правильно. Функция setFile и результаты print_r представлены ниже:

/**
* Sets file.
*
* @param UploadedFile $file
*/
public function setFile(UploadedFile $file = null)
{
$this->file = $file;
print_r($this->file); // [THIS IS FOR TEST]
// check if we have an old image path
if (is_file($this->getAbsolutePath())) {
// store the old name to delete after the update
$this->temp = $this->getAbsolutePath();
} else {
$this->link = 'initial';
}
}

результат print_r:

Symfony\Component\HttpFoundation\File\UploadedFile Object ( [test:Symfony\Component\HttpFoundation\File\UploadedFile:private] => [originalName:Symfony\Component\HttpFoundation\File\UploadedFile:private] => firefox.exe [mimeType:Symfony\Component\HttpFoundation\File\UploadedFile:private] => application/octet-stream [size:Symfony\Component\HttpFoundation\File\UploadedFile:private] => 338032 [error:Symfony\Component\HttpFoundation\File\UploadedFile:private] => 0 [pathName:SplFileInfo:private] => C:\wamp\tmp\php9DC3.tmp [fileName:SplFileInfo:private] => php9DC3.tmp )

У меня вопрос, почему, даже если файл указан правильно, проверка формы не удалась?

Когда я закомментирую часть моего setFile() функция начинает работать, что приводит к исключению перемещения.

‘

/**
* Sets file.
*
* @param UploadedFile $file
*/
public function setFile(UploadedFile $file = null)
{
$this->file = $file;

/*if (is_file($this->getAbsolutePath())) {
// store the old name to delete after the update
$this->temp = $this->getAbsolutePath();
} else {
$this->link = 'initial';
}*/
}

Моя форма класса:

<?php

namespace AppBundle\Form;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;

class DocumentsType extends AbstractType
{
/**
* @param FormBuilderInterface $builder
* @param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('marker')
->add('document_date', 'date', array('widget' => 'single_text', 'format' => 'yyyy-MM-dd'))
->add('file', 'file')
->add('notes', 'text', array('required' => "false"))
;
}

Мой контроллер, в котором функция is_valid приводит к отрицательному результату:

        /**
* This code is aimed at checking if the book is choseen and therefore whether any further works may be carried out
*/
$session = new Session();
if(!$session->get("App_Books_Chosen_Lp")) return new RedirectResponse($this->generateUrl('app_listbooks'));
// Authorization goes here

$documents = new Documents();
$form = $this->createForm(new DocumentsType(), $documents);
$form->add('save', 'submit', array('label' => 'Dodaj dokument'));
$form->handleRequest($request);

if ($form->isValid()) {

Класс моих документов:

    <?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\Validator\Constraints as Assert;
use Symfony\Component\HttpFoundation\File\UploadedFile;

/**
* @ORM\Entity
* @ORM\HasLifecycleCallbacks
* @ORM\Table(name="Documents")
*/

class Documents
{
/**
* @ORM\Column(type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;

/**
* @ORM\ManyToOne(targetEntity="Books", inversedBy="documents")
* @ORM\JoinColumn(name="book_id", referencedColumnName="id")
*/
protected $book;

/**
* @ORM\Column(type="string", length=220)
*/
protected $marker;

/**
* @ORM\Column(type="date", length=220)
*/
protected $document_date;

/**
* @ORM\Column(type="string", length=220)
* @Assert\File(maxSize="6000000")
*/
protected $link;

/**
* @ORM\Column(type="text")
*/
protected $notes;


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

/**
* Set marker
*
* @param string $marker
* @return Documents
*/
public function setMarker($marker)
{
$this->marker = $marker;

return $this;
}

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

/**
* Set document_date
*
* @param \DateTime $documentDate
* @return Documents
*/
public function setDocumentDate($documentDate)
{
$this->document_date = $documentDate;

return $this;
}

/**
* Get document_date
*
* @return \DateTime
*/
public function getDocumentDate()
{
return $this->document_date;
}

/**
* Set link
*
* @param string $link
* @return Documents
*/
public function setLink($link)
{
$this->link = $link;

return $this;
}

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


/**
* Set notes
*
* @param string $notes
* @return Documents
*/
public function setNotes($notes)
{
$this->notes = $notes;

return $this;
}

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

/**
* Set book
*
* @param \AppBundle\Entity\Books $book
* @return Documents
*/
public function setBook(\AppBundle\Entity\Books $book = null)
{
$this->book = $book;

return $this;
}

/**
* Get book
*
* @return \AppBundle\Entity\Books
*/
public function getBook()
{
return $this->book;
}

/*
* ### FILE UPLOAD PROCESS ###
*/

/**
* @Assert\File(maxSize="6000000")
*/
private $file;

/**
* Stores temporay path
*/
private $temp;

/**
* Sets file.
*
* @param UploadedFile $file
*/
public function setFile(UploadedFile $file = null)
{
$this->file = $file;
print_r($this->file); // [THIS IS FOR TEST]
// check if we have an old image path
if (is_file($this->getAbsolutePath())) {
// store the old name to delete after the update
$this->temp = $this->getAbsolutePath();
} else {
$this->link = 'initial';
}
}

/**
* @ORM\PrePersist()
* @ORM\PreUpdate()
*/
public function preUpload()
{
if (null !== $this->getFile()) {
$this->link = $this->getFile()->guessExtension();
}
}

/**
* Get file.
*
* @return UploadedFile
*/
public function getFile()
{
return $this->file;
}

public function getAbsolutePath()
{
return null === $this->link
? null
: $this->getUploadRootDir().'/'.$this->id.'.'.$this->link;
}

public function getWebPath()
{
return null === $this->link
? null
: $this->getUploadDir().'/'.$this->link;
}

protected function getUploadRootDir()
{
// the absolute directory  where uploaded
// documents should be saved
return __DIR__.'/../../../web/'.$this->getUploadDir();
}

protected function getUploadDir()
{
// get rid of the __DIR__ so it doesn't screw up
// when displaying uploaded doc/image in the view.
return 'uploads/documents';
}

/**
* @ORM\PostPersist()
* @ORM\PostUpdate()
*/
public function upload()
{
if (null === $this->getFile()) {
return;
}

// check if we have an old image
if (isset($this->temp)) {
// delete the old image
unlink($this->temp);
// clear the temp image path
$this->temp = null;
}

// you must throw an exception here if the file cannot be moved
// so that the entity is not persisted to the database
// which the UploadedFile move() method does
$this->getFile()->move(
$this->getUploadRootDir(),
$this->id.'.'.$this->getFile()->guessExtension()
);

$this->setFile(null);
}


/**
* @ORM\PreRemove()
*/
public function storeFilenameForRemove()
{
$this->temp = $this->getAbsolutePath();
}

/**
* @ORM\PostRemove()
*/
public function removeUpload()
{
if (isset($this->temp)) {
unlink($this->temp);
}
}

}