Render controller in TWIG and show form errors - php

Question

I have indexAction and contactAction
contactAction is a simple form with no mapped fields (FormType) like below:
/**
* #Route("/contact", name="contact")
* #Template()
* #param Request $request
* #return array
*/
public function contactAction(Request $request)
{
$form = $this->createForm(new ContactType());
$form->handleRequest($request);
if ($form->isValid()) {
$firstName = $form->get('first_name')->getData();
$lastName = $form->get('last_name')->getData();
$email = $form->get('email')->getData();
$message = $form->get('message')->getData();
}
return array(
'form' => $form->createView()
);
}
and i render this form in my indexAction with this TWIG command:
{{ render(controller('RusselBundle:Default:contact')) }}
Everything is okey, if page is not reloaded, HTML5 validators works fine, but if form have some errors like: firstName length, error's not show at all, how can i do, so that errors showed up in the form indexAction? Any help would be appreciated. I'm just curious it's possible, and if - how ? Sorry for my english....

Answer 1

Rather than using the request passed into the action you should get the master request from the request stack. As #DebreczeniAndrás says, when you use the render(controller()) you are using a newly created sub-request rather than the request that was actually passed to the page on load (the master request).
public function contactAction(Request $request)
{
$request = $this->get('request_stack')->getMasterRequest();
$form = $this->createForm(new ContactType());
//...
}

Answer 2

On symfony3 use render function like this
{{ render(controller('RusselBundle:Default:contact', {'request':app.request})) }}

Answer 3

If you use the render function in your twig, then that creates a subrequest, thus your original posted (i.e. in your main request) values get lost.
You can pass your main request to your form render action as follows:
{{ render(controller('RusselBundle:Default:contact'), 'request' : app.request ) }}
This will pass all the main request parameters appropriately to your subrequest.