CollectionType entities issue - php

Question

Well I'm trying to create a form which can handle multiple file uploads. So far so good. I have two tables image and product which has ManyToOne relationship. I'm using CollecitonType field for the images so I can dynamically add/remove fields on the fly. The problem is that I get this exception on form rendering
Neither the property "imageFile" nor one of the methods "getImageFile()", "imageFile()", "isImageFile()", "hasImageFile()", "__get()" exist and have public access in class "AppBundle\Entity\Product".
What I'm doing wrong?
AppBundle\Entity\Image
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use Symfony\Component\HttpFoundation\File\File;
use Vich\UploaderBundle\Mapping\Annotation as Vich;
/**
* Product
*
* #ORM\Table()
* #ORM\Entity
*/
class Image
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\ManyToOne(targetEntity="Product")
*/
protected $product;
/**
* NOTE: This is not a mapped field of entity metadata, just a simple property.
*
* #Vich\UploadableField(mapping="product_image", fileNameProperty="imageName")
*
* #var File
*/
private $imageFile;
/**
* #ORM\Column(type="string", length=255)
*
* #var string
*/
private $imageName;
/**
* #ORM\Column(type="datetime")
*
* #var \DateTime
*/
private $updatedAt;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* 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 $image
*/
public function setImageFile(File $image = null)
{
$this->imageFile = $image;
if ($image) {
// 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 getImageFile()
{
return $this->imageFile;
}
/**
* #param string $imageName
*/
public function setImageName($imageName)
{
$this->imageName = $imageName;
}
/**
* #return string
*/
public function getImageName()
{
return $this->imageName;
}
/**
* Set updatedAt
*
* #param \DateTime $updatedAt
*
* #return Image
*/
public function setUpdatedAt($updatedAt)
{
$this->updatedAt = $updatedAt;
return $this;
}
/**
* Get updatedAt
*
* #return \DateTime
*/
public function getUpdatedAt()
{
return $this->updatedAt;
}
/**
* Set product
*
* #param \AppBundle\Entity\Product $product
*
* #return Image
*/
public function setProduct(\AppBundle\Entity\Product $product = null)
{
$this->product = $product;
return $this;
}
/**
* Get product
*
* #return \AppBundle\Entity\Product
*/
public function getProduct()
{
return $this->product;
}
}
AppBundle\Entity\Product
<?php
namespace AppBundle\Entity;
use Doctrine\Common\Collections\ArrayCollection ;
use Doctrine\ORM\Mapping as ORM;
/**
* Product
*
* #ORM\Table()
* #ORM\Entity
*/
class Product
{
/**
* #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)
*/
private $name;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* #param string $name
*
* #return Product
*/
private $image;
/**
* Constructor
*/
public function __construct()
{
$this->image = new ArrayCollection;
}
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}
public function getImages()
{
return $this->images;
}
public function addImage(ImageInterface $image)
{
if (!$this->images->contains($image)) {
$this->images->add($image);
}
return $this;
}
public function removeImage(ImageInterface $image)
{
$this->images->remove($image);
return $this;
}
public function setImages(Collection $images)
{
$this->images = $images;
}
}
AppBundle\Form\ImageType
..............
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('imageFile', 'file')
;
}
/**
* #param OptionsResolverInterface $resolver
*/
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'AppBundle\Entity\Image',
'attr'=> array('novalidate'=>'novalidate')
));
}
.............
AppBundle\Form\ProductType
...........
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('name', 'text')
->add('imageFile', 'collection', array(
'allow_add' => true,
'allow_delete' => true,
'required' => false,
'type' => new ImageType(),
'prototype' => true,
'attr' => array(
'class' => 'selection',
),
))
->add('upload', 'submit')
;
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'AppBundle\Entity\Product',
'attr'=> array('novalidate'=>'novalidate')
));
}
......

Answer 1

First :
In your Product class:
Your variable is named private $image, it should be private $images; with the 'S' for plurial.
Second :
In your product form builder, you ask for a field named ImageFile, but it doesn't exist in Product class (but exists on Image class), it should be images.