<?php

namespace Acme\DemoBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilder;

use Doctrine\ORM\EntityRepository;

class LocationChoiceType extends AbstractType
{
    public function buildForm(FormBuilder $builder, array $options)
    {
        $builder->add('region', 'entity', array(
            'em' => 'default',
            'class' => 'Acme\\DemoBundle\\Entity\\Region',
            'multiple' => false,
            'required' => true,
            'query_builder' => function(EntityRepository $repo) {
                return $repo->createQueryBuilder('r')->orderBy('r.name', 'ASC');
            },
        ));

    }

   /**
     * set parent to form cause our type will have more fields than one
     */
    public function getParent (array $options)
    {
        return 'form';
    }

    /**
     * we can register type as service using that name as form.type tag alias
     */
    public function getName()
    {
        return 'location_choice';
    }
}