Symfony2 ManyToMany multiple field form collection - symfony

Question

Is there a way to save correctly in a relationship ManyToMany field entities in a form that is "multiple" and is part of a collection?
I looked everywhere but could not find a shred of example to make me understand how to do!
I cannot find the solution for this!
class Anagrafica
{
/**
* #ORM\ManyToMany(targetEntity="SubCategories", inversedBy="anagrafiche", cascade={"persist", "remove"})
* #ORM\JoinTable(name="AnCat")
**/
private $subCategories;
//..
public function __construct()
{
$this->subCategories = new \Doctrine\Common\Collections\ArrayCollection();
//..
}
/**
* Add subCategories
*
* #param \My\BusinessBundle\Entity\SubCategories $subCategories
* #return Anagrafica
*/
public function addSubCategory(\My\BusinessBundle\Entity\SubCategories $subCategories)
{
foreach ($subCategories as $subCategory) {
$subCategory->addAnagrafiche($this);
}
$this->subCategories = $subCategories;
}
*******
class SubCategories
{
/**
* #ORM\ManyToMany(targetEntity="Anagrafica", mappedBy="subCategories")
*/
private $anagrafiche;
public function __construct()
{
$this->anagrafiche = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* Add anagrafiche
*
* #param \My\BusinessBundle\Entity\Anagrafica $anagrafiche
* #return SubCategories
*/
public function addAnagrafiche(\My\BusinessBundle\Entity\Anagrafica $anagrafiche)
{
if (!$this->anagrafiche->contains($anagrafiche)) {
$this->anagrafiche->add($anagrafiche);
}
}
******
AnagraficaType:
//..
->add('subCategories', 'collection', array('type' => new SubCategoriesType(),
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
'prototype_name' => '__categ__',
'by_reference' => false
))
*******
SubCategoriesType:
->add('subCategory', 'entity', array(
'class' => 'CoffeeBusinessBundle:SubCategories',
'property' => 'subCategory',
'label' => 'Sotto Categorie',
'multiple' => true
))

Answer 1

Partially solved
If I enter the field collection directly and do these changes:
AnagraficaType:
->add('subCategories', 'collection', array(
'type' => 'entity',
'allow_add' => true,
'allow_delete' => true,
'prototype' => true,
'prototype_name' => '__categ__',
'by_reference' => false,
'options' => array(
'label' => 'Sotto Categorie',
'multiple' => true,
'class' => 'MyBusinessBundle:SubCategories',
'property' => 'subCategory'
)
))
Anagrafica entity:
public function addSubCategory(ArrayCollection $subCategories)
{
foreach ($subCategories as $subCategory) {
$subCategory->addAnagrafiche($this);
//var_dump($subCategory);
}
$this->subCategories = $subCategories;
}
Partially get the desired result, but if I add a field in the form subcategories (by collection) saves only the last field entered.
I did a var_dump ArrayCollection object received and in fact inside there are only data from the last field entered.
Any idea?