How to make a Symfony GET form redirect to route with parameter? - forms

Question

I want to create a form for searching a profile by username which redirect then to the profile page of the user. Btw, I use Symfony 3.2.
I reckon the natural way for doing this would be a GET action form. It would even allow a customer to change the url directly with the good username to see its profile.
Here is the code of my controller :
ProfileController.php
//...
/** #Route("/profil/search", name="profil_search") */
public function searchAction() {
$builder = $this->createFormBuilder();
$builder
->setAction($this->generateUrl('profil_show'))
->setMethod('GET')
->add('username', SearchType::class, array('label' => 'Username : '))
->add('submit', SubmitType::class, array('label' => 'Search'));
$form = $builder->getForm();
return $this->render('profils/profil_search.html.twig', [
'form' => $form->createView(),
]);
}
/** #Route("/profil/show/{username}", name="profil_show") */
public function showAction($username) {
$repository = $this->getDoctrine()->getRepository('AppBundle:User');
$searchedUser = $repository->findOneByUsername($username);
return $this->render('profils/profil_show.html.twig', [
'searchedUser' => $searchedUser,
]);
}
//...
This code will lead to the following error message :
Some mandatory parameters are missing ("username") to generate a URL for
route "profil_show".
I read the documentation thoroughly but couldn't guess, how can I pass the username variable to the profil_show route as a parameter ?
If my way of doing is not the good one, thanks for telling me in comments but I'd still like to know how to use GET forms.
EDIT :
Thanks to #MEmerson answer, I get it now. So for future noobs like me, here is how I did it :
/** #Route("/profil/search", name="profil_search") */
public function searchAction(Request $request) {
$data = array();
$builder = $this->createFormBuilder($data);
$builder
//->setAction($this->generateUrl('profil_show'))
//->setMethod('GET')
->add('username', SearchType::class, array('label' => 'Username : '))
->add('submit', SubmitType::class, array('label' => 'Search'));
$form = $builder->getForm();
$form->handleRequest($request);
if ($form->isSubmitted() && $form->isValid()) {
$data = $form->getData();
return $this->redirectToRoute('profil_show', array('username' => $data["username"]));
}
return $this->render('profils/profil_search.html.twig', [
'method' => __METHOD__,
'form' => $form->createView(),
'message' => $message,
]);
}

Answer 1

If you take a look at the error message it says that the problem is where you are trying to generate the URL for the path 'profil_show'.
Your controller annotations require that the URL be populated with a user name
/** #Route("/profil/show/{username}", name="profil_show") */
this means that Symfony is expecting http://yoursite.com/profil/show/username for the route. But if you want to pass it as a GET form posting it really should be expecting http://yoursite.com/profil/show?username
you can add a second route or change your existing route to be
/** #Route("/profil/show", name="profil_show_search") */
that should solve your problem.