Set Default value of choice field Symfony FormType

Question

I want from the user to select a type of questionnaire, so I set a select that contains questionnaires types.

Types are loaded from a an entity QuestionType

Answer 1

I made it by setting a type in the newAction of my Controller I will get the seted type as default value.

public function newAction($id)
{
    $entity = new RankingQuestion();

    //getting values form database 
    $em = $this->getDoctrine()->getManager();
    $type =  $em->getRepository('QuizmooQuestionnaireBundle:QuestionType')->findBy(array('name'=>'Ranking Question'));
    $entity->setQuestionType($type); // <- default value is set here 

    // Now in this form the default value for the select input will be 'Ranking Question'
    $form   = $this->createForm(new RankingQuestionType(), $entity);

    return $this->render('QuizmooQuestionnaireBundle:RankingQuestion:new.html.twig', array(
        'entity' => $entity,
        'form'   => $form->createView(),
        'id_questionnaire' =>$id
    ));
}

You can use data attribute if you have a constant default value (http://symfony.com/doc/current/reference/forms/types/form.html) but it wont be helpful if you are using the form to edit the entity ( not to create a new one )