On-the-fly Symfony form for searches

Version 1: Typeless form

Inside the controller:

$q = $request->query->get('q');

$data = array('q' => $q); 

$searchForm = $this->get('form.factory')

    ->createNamedBuilder('', 'form', $data, array(

        'csrf_protection' => false,

        'method' => 'GET',

    ))

    ->add('q', 'text', array(

        'required' => false,

    ))

    ->getForm();

if($q) {

    $data = $searchForm->handleRequest($request)->getData();

    $qb

        ->andWhere($qb->expr()->like('name',  ':q'))

        ->setParameter('q', $data['q']);

} 

return $this->render('@Bundle:Entity:index.html.twig', array(

            'searchForm'    => $searchForm->createView()

        ));

Version 2:  using FormType

Inside controller:

$filterForm = $this->createForm(new SomeFilterType(), null, array(

    'method' => 'GET',

));

$filterForm->handleRequest($request);

if ($filterForm->isValid()) {

    $name = $filterForm->get('name')->getNormData();

// …

}