Symfony2 pass two variables from the service to the Controller $slug - forms

Question

To clean up my controller code I want to move the "newPostAction" to a service. The problem I get is that now I cannot pass as a result of the funtion in the service two variables to the controller. I use the function to create a form, and the get the slug from the form's post and render it. I do not know how to pass it to the controller. I tried using the "list()" function but it does not get the info right.
How can I call the pos's "slug" from inside the controller?
Here is the controller code:
/**
* #param Request $request
* #return array
*
* #Route("/new/_post", name="_blog_backend_post_new")
* #Template("BlogBundle:Backend/Post:new.html.twig")
*/
public function newPostAction(Request $request)
{
$form_post = $this->getPostManager()->createPost($request);
$slug_post = ¿How do I get it from inside the createPost()?;
if (true === $form_post)
{
$this->get('session')->getFlashBag()->add('success', 'Your post was submitted successfully');
return $this->redirect($this->generateUrl('blog_blog_post_show', array('slug' => $slug_post)));
}
return array(
'post_slug' => $slug_post,
'form_post' => $form_post->createView()
);
}
Here is the PostManager service to create the new post entity:
/**
* Create and validate a new Post
*
* #param Request $request
* #return bool|FormInterface
*/
public function createPost (Request $request)
{
$post = new Post();
$post->setAuthor($this->um->getloggedUser());
$form_post = $this->formFactory->create(new PostType(), $post);
$form_post->handleRequest($request);
$slug_post = $post->getSlug();
if ($form_post->isValid())
{
$this->em->persist($post);
$this->em->flush();
return true;
}
return $form_post;
}

Answer 1

You just need to return an array from the service and access the values from the controller.
UPDATE
Some changes need to be made to your code in order to get things to work.
Explanation: when the form is valid, the previous code (I deleted it) returned true therefore $ret["form_post"] didn't make sense because $ret was not an array. It surprises me that it didn't throw you an error.
Anyway, that could explain why Doctrine didn't persist your entity. Talking about the redirection, the error could be due to the same reason. $ret was true (a boolean) and $ret["form_slug"] didn't make sense either.
I hope this fixes the problems. Please, let me know if it works.
Service
public function createPost (Request $request)
{
$post = new Post();
$post->setAuthor($this->um->getloggedUser());
$form_post = $this->formFactory->create(new PostType(), $post);
$form_post->handleRequest($request);
$slug_post = $post->getSlug();
if ($form_post->isValid())
{
$this->em->persist($post);
$this->em->flush();
return array("form_post" => true, "slug_post" => $slug_post);;
}
return array("form_post" => $form_post, "slug_post" => $slug_post);
}
Controller:
public function newPostAction(Request $request)
{
$ret = $this->getPostManager()->createPost($request);
$form_post = $ret["form_post"];
$slug_post = $ret["slug_post"];
if (true === $form_post)
{
$this->get('session')->getFlashBag()->add('success', 'Your post was submitted successfully');
return $this->redirect($this->generateUrl('blog_blog_post_show', array('slug' => $slug_post)));
}
return array(
'post_slug' => $slug_post,
'form_post' => $form_post->createView()
);
}