Symfony 2 — VichUploader не может обработать файл

У меня очень странная проблема с VichUploader.

У меня есть 2 объекта, где для одного из них VichUploader работает нормально (Download Entity) — он сохраняет файл в каталоге и добавляет запись в таблицу базы данных. Для второго объекта (Предложение) это не работает — он отображает Column 'file_name' cannot be null ошибка. Если я добавил параметр nullable в свойство fileName, он добавил запись в таблицу базы данных, но с NULL file_name (и не сохранял файл в каталоге).

Мой config.yml

vich_uploader:
db_driver: orm

mappings:
download_file:
uri_prefix:         /files/download
upload_destination: %kernel.root_dir%/../web/files/download

offer_file:
uri_prefix:         /files/offer
upload_destination: %kernel.root_dir%/../web/files/offer

inject_on_load:     false
delete_on_update:   false
delete_on_remove:   true

Скачать сущность:

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\HttpFoundation\File\File;
use Vich\UploaderBundle\Mapping\Annotation as Vich;

/**
* Download
*
* @ORM\Table(name="izo_download")
* @ORM\Entity(repositoryClass="AppBundle\Entity\DownloadRepository")
* @Vich\Uploadable
*/
class Download
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;

/**
* @var \DateTime
*
* @ORM\Column(name="date", type="datetime")
*/
private $date;

/**
* NOTE: This is not a mapped field of entity metadata, just a simple property.
*
* @Vich\UploadableField(mapping="download_file", fileNameProperty="name")
*
* @var File $file
*/
private $file;

/**
* @var string
*
* @ORM\Column(name="name", type="string", length=255)
*/
private $name;


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

/**
* Set name
*
* @param string $name
*
* @return Download
*/
public function setName($name)
{
$this->name = $name;

return $this;
}

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

/**
* Set date
*
* @param \DateTime $date
*
* @return Download
*/
public function setDate($date)
{
$this->date = $date;

return $this;
}

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

/**
* If manually uploading a file (i.e. not using Symfony Form) ensure an instance
* of 'UploadedFile' is injected into this setter to trigger the  update. If this
* bundle's configuration parameter 'inject_on_load' is set to 'true' this setter
* must be able to accept an instance of 'File' as the bundle will inject one here
* during Doctrine hydration.
*
* @param File|\Symfony\Component\HttpFoundation\File\UploadedFile $file
*/
public function setFile(File $file = null)
{
$this->file = $file;

if ($file) {
// It is required that at least one field changes if you are using doctrine
// otherwise the event listeners won't be called and the file is lost
$this->date = new \DateTime('now');
}
}

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

Предложение сущности

<?php

namespace AppBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\HttpFoundation\File\File;
use Vich\UploaderBundle\Mapping\Annotation as Vich;
use Symfony\Component\Validator\Constraints as Assert;

/**
* Offer
*
* @ORM\Table(name="izo_offer")
* @ORM\Entity(repositoryClass="AppBundle\Entity\OfferRepository")
* @Vich\Uploadable
* @ORM\HasLifecycleCallbacks()
*/
class Offer
{
/**
* @var integer
*
* @ORM\Column(name="id", type="integer")
* @ORM\Id
* @ORM\GeneratedValue(strategy="AUTO")
*/
private $id;

/**
* @var string
*
* @ORM\Column(name="name", type="string", length=255)
* @Assert\NotBlank(message="To pole nie może być puste")
*/
private $name;

/**
* @Assert\Type(type="AppBundle\Entity\Client")
* @Assert\Valid
* @Assert\NotBlank(message="To pole nie może być puste")
* @ORM\ManyToOne(targetEntity="Client", inversedBy="offers",cascade={"persist"})
* @ORM\JoinColumn(name="client_id", referencedColumnName="id")
*/
private $clientBelongsTo;

/**
* @Assert\NotBlank(message="To pole nie może być puste")
* @ORM\ManyToOne(targetEntity="User", inversedBy="supportOffers")
* @ORM\JoinColumn(name="contact_person_id", referencedColumnName="id")
*/
private $contactPerson;

/**
* @ORM\ManyToOne(targetEntity="User", inversedBy="createdOffers")
* @ORM\JoinColumn(name="creator_id", referencedColumnName="id")
*/
private $createdBy;

/**
* @ORM\OneToMany(targetEntity="Measurement", mappedBy="createdBy")
*/
private $createdMeasurements;

/**
* @ORM\OneToMany(targetEntity="Measurement", mappedBy="contactPerson")
*/
private $supportMeasurements;

/**
* @var \DateTime
*
* @ORM\Column(name="createdAt", type="date")
*/
private $createdAt;

/**
* @var string
*
* @ORM\Column(name="note", type="text", nullable=true)
*/
private $note;

/**
* @Assert\NotBlank(message="To pole nie może być puste")
* @var integer
*
* @ORM\Column(name="comesFrom", type="integer")
*/
private $comesFrom;

/**
* @Assert\NotBlank(message="To pole nie może być puste", groups={"creation"})
* @var \DateTime
*
* @ORM\Column(name="notify", type="date")
*/
private $notify;

/**
* @var integer
*
* @ORM\Column(name="status", type="integer")
*/
private $status = 1;

/**
* @var integer
*
* @ORM\Column(name="whyNotSold", type="integer", nullable=true)
*/
private $whyNotSold;

/**
*
* NOTE: This is not a mapped field of entity metadata, just a simple property.
*
* @Vich\UploadableField(mapping="offer_file", fileNameProperty="fileName")
*
* @var File $file
*/
private $file;

/**
* @var string
*
* @ORM\Column(name="file_name", type="string", length=255)
*/
private $fileName;

/**
* @ORM\Column(type="datetime")
*
* @var \DateTime $updatedAt
*/
protected $updatedAt;

/**
* If manually uploading a file (i.e. not using Symfony Form) ensure an instance
* of 'UploadedFile' is injected into this setter to trigger the  update. If this
* bundle's configuration parameter 'inject_on_load' is set to 'true' this setter
* must be able to accept an instance of 'File' as the bundle will inject one here
* during Doctrine hydration.
*
* @param File|\Symfony\Component\HttpFoundation\File\UploadedFile $file
*/
public function setFile(File $file = null)
{
$this->$file = $file;

if ($file) {
// It is required that at least one field changes if you are using doctrine
// otherwise the event listeners won't be called and the file is lost
$this->updatedAt = new \DateTime('now');
}
}

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

/**
* @param string $fileName
*/
public function setFileName($fileName)
{
$this->fileName = $fileName;
}

/**
* @return string
*/
public function getFileName()
{
return $this->fileName;
}


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

/**
* Set name
*
* @param string $name
*
* @return Offer
*/
public function setName($name)
{
$this->name = $name;

return $this;
}

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

/**
* Set createdAt
*
* @ORM\PrePersist
*
* @return Offer
*/
public function setCreatedAt()
{
$this->createdAt = new \DateTime();
}

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

/**
* Set note
*
* @param string $note
*
* @return Offer
*/
public function setNote($note)
{
$this->note = $note;

return $this;
}

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


/**
* Set notify
*
* @param \DateTime $notify
*
* @return Offer
*/
public function setNotify($notify)
{
$this->notify = $notify;

return $this;
}

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

/**
* Set status
*
* @param integer $status
*
* @return Offer
*/
public function setStatus($status)
{
$this->status = $status;

return $this;
}

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

/**
* Set whyNotSold
*
* @param integer $whyNotSold
*
* @return Offer
*/
public function setWhyNotSold($whyNotSold)
{
$this->whyNotSold = $whyNotSold;

return $this;
}

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

/**
* Set contactPerson
*
* @param \AppBundle\Entity\User $contactPerson
*
* @return Offer
*/
public function setContactPerson(\AppBundle\Entity\User $contactPerson = null)
{
$this->contactPerson = $contactPerson;

return $this;
}

/**
* Get contactPerson
*
* @return \AppBundle\Entity\User
*/
public function getContactPerson()
{
return $this->contactPerson;
}

/**
* Set createdBy
*
* @param \AppBundle\Entity\User $createdBy
*
* @return Offer
*/
public function setCreatedBy(\AppBundle\Entity\User $createdBy = null)
{
$this->createdBy = $createdBy;

return $this;
}

/**
* Get createdBy
*
* @return \AppBundle\Entity\User
*/
public function getCreatedBy()
{
return $this->createdBy;
}

/**
* Set comesFrom
*
* @param integer $comesFrom
*
* @return Offer
*/
public function setComesFrom($comesFrom)
{
$this->comesFrom = $comesFrom;

return $this;
}

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


/**
* Set clientBelongsTo
*
* @param \AppBundle\Entity\Client $clientBelongsTo
*
* @return Offer
*/
public function setClientBelongsTo(\AppBundle\Entity\Client $clientBelongsTo = null)
{
$this->clientBelongsTo = $clientBelongsTo;

return $this;
}

/**
* Get clientBelongsTo
*
* @return \AppBundle\Entity\Client
*/
public function getClientBelongsTo()
{
return $this->clientBelongsTo;
}
/**
* Constructor
*/
public function __construct()
{
$this->createdMeasurements = new \Doctrine\Common\Collections\ArrayCollection();
$this->supportMeasurements = new \Doctrine\Common\Collections\ArrayCollection();
}

/**
* Add createdMeasurement
*
* @param \AppBundle\Entity\Measurement $createdMeasurement
*
* @return Offer
*/
public function addCreatedMeasurement(\AppBundle\Entity\Measurement $createdMeasurement)
{
$this->createdMeasurements[] = $createdMeasurement;

return $this;
}

/**
* Remove createdMeasurement
*
* @param \AppBundle\Entity\Measurement $createdMeasurement
*/
public function removeCreatedMeasurement(\AppBundle\Entity\Measurement $createdMeasurement)
{
$this->createdMeasurements->removeElement($createdMeasurement);
}

/**
* Get createdMeasurements
*
* @return \Doctrine\Common\Collections\Collection
*/
public function getCreatedMeasurements()
{
return $this->createdMeasurements;
}

/**
* Add supportMeasurement
*
* @param \AppBundle\Entity\Measurement $supportMeasurement
*
* @return Offer
*/
public function addSupportMeasurement(\AppBundle\Entity\Measurement $supportMeasurement)
{
$this->supportMeasurements[] = $supportMeasurement;

return $this;
}

/**
* Remove supportMeasurement
*
* @param \AppBundle\Entity\Measurement $supportMeasurement
*/
public function removeSupportMeasurement(\AppBundle\Entity\Measurement $supportMeasurement)
{
$this->supportMeasurements->removeElement($supportMeasurement);
}

/**
* Get supportMeasurements
*
* @return \Doctrine\Common\Collections\Collection
*/
public function getSupportMeasurements()
{
return $this->supportMeasurements;
}
}