Getting to request result double into the controller - symfony

Question

I have the follow problem i send this form to the twig but to obtain the request from the view in the controller i must put two "get", how can fix and do better the code in the controller.
//I have this builder RolType.php:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('nombreRol','entity',
array('class' => 'gdrgdrBundle:Rol',
'choice_label' => 'nombreRol',
'required' => false,
)) ;
}
//My controller mainController.php
$rol = new Rol();
$formRol = $this->createForm(new RolType(), $rol);
$em = $this->getDoctrine()->getManager();
if ($request->isMethod('POST')) {
$formRol->handleRequest($request);
if ($formRol->isSubmitted() && $formRol->isValid()) {
$rolResult = $rol->getNombreRol()->getNombreRol()));
}
}
//View Rol.html.twig
<form action="{{ path("rol")}}" method="post" role="form">
{{ form_errors(nuevoRolForm) }}
{{ form_widget(nuevoRolForm._token) }}
{{ form_rest(nuevoRolForm) }}
</form>
//Entity Rol.php
class Rol
{
private $id;
private $nombreRol;
/**
* Set nombreRol
*
* #param string $nombreRol
* #return Rol
*/
public function setNombreRol($nombreRol)
{
$this->nombreRol = $nombreRol;
return $this;
}
/**
* Get nombreRol
*
* #return string
*/
public function getNombreRol()
{
return $this->nombreRol;
}
}