Symfony Forms OneToMany/ManyToOne selector problems - symfony

Question

I am trying to create a Form with a Category selector for a Page entity - Pages can have many categories in multiple Registries.
The relationship from Page --> Category is a OneToMany/ManyToOne with an intermediate PagesCategoryEntity that has a discriminator property (categoryRegistryId).
I have successfully figured out how to use the 'entity' Type in the FormBuilder to create ONE multiple select box. But in the end, I will need to have multiple select-boxes (for each registry) with a discriminator value in the html somewhere.
So, I need to know how to get the additional properties of PagesCategoryEntity into the Form and then how I can access them in the getters/setters of the PageEntity.
Surely, I cannot be the only person to have values in the intermediate entity that need to be accessible in the form and persistence layer?
I appreciate you taking the time to look at this!
craig
truncated Entity and Form classes for Brevity.
class CategoryEntity
{
/**
* #ORM\Id
* #ORM\GeneratedValue
* #ORM\Column(type="integer")
*/
private $id;
// other properties, getters, setters, etc...
}
class PageEntity
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #ORM\OneToMany(targetEntity="PagesCategoryEntity",
* mappedBy="page", cascade={"all"},
* orphanRemoval=true, indexBy="categoryRegistryId")
*/
private $categories;
// other properties, getters, setters, etc...
}
class PagesCategoryEntity
{
/**
* #ORM\Id
* #ORM\Column(type="integer")
* #ORM\GeneratedValue
*/
private $id;
/**
* #ORM\Column(type="integer")
*/
private $categoryRegistryId;
/**
* #ORM\ManyToOne(targetEntity="CategoryEntity")
* #ORM\JoinColumn(name="categoryId", referencedColumnName="id")
*/
private $category;
/**
* #ORM\ManyToOne(targetEntity="PageEntity", inversedBy="categories")
* #ORM\JoinColumn(name="entityId", referencedColumnName="pageid")
*/
private $page;
}
class PageType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('categories', 'entity', array(
'class' => 'MyCoolBundle:CategoryEntity',
'query_builder' => function (EntityRepository $er) {
return $er->createQueryBuilder('c')
->where('c.parent = :parent')
->setParameter('parent', 19)
->orderBy('c.name', 'ASC');
},
'property' => "name",
'multiple' => true,
'required' => false,
'empty_data' => null,
));
}
}

Answer 1

Try this then:
->add('categories',
'entity',
array(
'class'=>'Acme\MycoolBundle\Entity\Category',
'property'=>'name',
'query_builder' => function (\Acme\MycoolBundle\Entity\CategoryRepository $repository)
{
return $repository->createQueryBuilder('c')
->where('c.parent = :parent')
->setParameter('parent', 19)
->add('c.name', 'ASC');
}
)
);
try to create a category Repository if u don't have and adapt the scripts for ur needs it works for me!

Answer 2

Try to use Collection instead of using Entity!
Collection is used in one to many/ many to one
you can try the tutorial of symfony cookbook for collection forms
http://symfony.com/doc/current/cookbook/form/form_collections.html
i hope it helps ;)