Symfony2 Form Builder Select Across Join Table with Metadata

Question

I have 3 entities:

[Member] ----OneToMany----> [MemberCategory] ---ManyToOne---> [Category]

This works well as far as fetching results fr

Answer 1

The post of cheesemacfly is not so bad, but it is call embeded form and can be complicated to manage. In fact, you jus need to create a "Custom Repositories" http://symfony.com/doc/current/book/doctrine.html#custom-repository-classes

It will add a new methods for "grabbing" your ORM object with Doctrine2 like find() or findBy();

1) Create a new repository in a Repository Folder of your Bundle

createQueryBuilder('c')
         ->leftJoin('c.Member', 'mc')
         ->where('mc.member = ?1')
         ->setParameter(1, $member);
}

}

2) Attached your Cutom repository to your Entity

namespace YourVendor\SMWMemberBundle\Entity;
use Doctrine\ORM\Mapping as ORM;

/**
* @ORM\Entity(repositoryClass="YourVendor\SMWMemberBundle\Entity\ProductRepository")
* @ORM\Table(name="Category") 
*/
class Category{

3) add a constructor to your Form class and pass de Entity Manager and the variable required to your query :

class CategoryUserForm extends AbstractType
{
   private $em;
   private $member ;


   public function __construct(EntityManager $em, $site, $seed)
   {
       $this->em = $em;
       $this->member = $member;

   }

public function buildForm(FormBuilder $builder, array $options)
{
    $qb = $this->em->getRepository('SMWMemberBundle:Category')->UsedByUsers($this->member);
    $builder->add('categories', 'entity', array(
        'class' => 'SMWMemberBundle:MemberCategory',
        'query_builder'     => $qb,
        'multiple'     => true,
        'expanded'     => true,
        'required' => false
    ));
 }

4) In your controller, you create your form like that :

$editForm = $this->createForm(new CategoryUserForm($em, $member), $category);

Feel free to ask me questions, I'm hope this is what you are looking for ;)