Symfony2 - How to set, and get, options when using a Form Class?

Question

I am using Form Classes to build the various form in my project.

In the Entity Type file, for the buildForm function, there is a secondary parameter of \"array $options\

Answer 1

Let me show you what worked for me

In the Controller:

$form = $this->createForm(new UsersType(), $entity, array(
    'attr' => array('locationId' => $currentLocationId)));

In the FormType:

->add('location', 'entity', array(
        'class' => 'Ro\RoinventBundle\Entity\Locations',
         'query_builder' => function (\Doctrine\ORM\EntityRepository $er) use ($options)
        {
            if (isset($options['attr']['locationId']) && ($options['attr']['locationId'] != NULL))
            {
                return $er->createQueryBuilder('Locations')
                    ->where('Locations.id = :param')
                    ->setParameter('param', $options['attr']['locationId']);
            }
            //else do what you want
},
));