Symfony2 Create a Post calls ShowAction - forms

Question

I am "transplanting" my old website code into the new Symfony2.6. I have a Controller to render a form and create posts as in a blog. Then it is submited (POST method) in a second controller once it is valid. When I call the route to initialize the controller, for some reason I ignore, it also calls the ShowAction($slug), and it fails since the post it is not yet created and hence it does not have any $slug parameter. Why is it calling this showAction? Despite I type the url to just display the form.
Here is the error log at the line that starts the failure:
1. in src/Blog/BlogBundle/Services/PostManager.php at line 80
2. at PostManager ->findBySlug ('create_post') in src/Blog/BlogBundle/Controller PostController.php at line 55
3. at PostController ->ShowAction ('create_post')
4. at call_user_func_array (array(object(PostController), 'ShowAction'), array('create_post')) in app/bootstrap.php.cache at line 3020
I do not want to call the ShowAction.
Here is the controller code:
/**
* Show a Post
*
* #param string $slug
*
* #throws NotFoundHttpException
* #return array
*
* #Route("/{slug}")
* #Template()
*/
public function ShowAction($slug)
{
$post = $this->getPostManager()->findBySlug($slug);
$form_comment = $this->createForm(new CommentType());
return array(
'post' => $post,
'form_comment' => $form_comment->createView()
);
}
/**
* Displays a form to create a new Post entity.
*
* #Route("/new_post", name="_blog_backend_post_new")
* #Template()
*/
public function newAction()
{
$form = $this->createForm(new PostType(), new PostModel(new Post()));
return array(
'form' => $form->createView(),
);
}
/**
* Creates a new Post entity.
*
* #Route("/create_post", name="_blog_backend_post_create")
* #Method("POST")
* #Template("BlogBundle:Backend/Post:new.html.twig")
*/
public function createAction()
{
$request = $this->getRequest();
$em = $this->getDoctrine()->getManager();
$form = $this->createForm(new PostType(), new PostModel(new Post()));
$formHandler = new PostHandler($form, $request, new Post(), $em);
if ($formHandler->process()) {
return $this->redirect($this->generateUrl('_blog_backend_post'));
}
return array(
'form' => $form->createView(),
);
}
I do not know if its necessary but here are the involved templates:
* #Template("BlogBundle:Backend/Post:new.html.twig"):
{% extends "::base.html.twig" %}
{% block content %}
<form class="well" action="{{ url('_blog_backend_post_create') }}" method="post" {{ form_enctype(form) }}>
{% include 'BlogBundle:Backend/Post:edit.form.html.twig' with {'form': form } %}
</form>
{% endblock %}
BlogBundle:Backend/Post:edit.form.html.twig:
{% if form_errors(form) %}
<div class="alert alert-block alert-error fade in form-errors">
{{ form_errors(form) }}
</div>
{% endif %}
<p>
<label for="">Title</label>
{% if form_errors(form.title) %}
<div class="alert alert-block alert-error fade in form-errors">
{{ form_errors(form.title) }}
</div>
{% endif %}
{{ form_widget(form.title, { 'attr': {'class': 'w100'} }) }}
</p>
<p>
<label for="">Body</label>
{% if form_errors(form.body) %}
<div class="alert alert-block alert-error fade in form-errors">
{{ form_errors(form.body) }}
</div>
{% endif %}
{{ form_widget(form.body, { 'attr': {'class': 'w100'} }) }}
</p>
<p>
<button class="btn" type="submit">Save</button>
<a class="btn" href="{{ url('_blog_backend_post') }}">Cancel</a>
</p>
{{ form_rest(form) }}
What I am missing and how can I correct it? Thank you in advanced.

Answer 1

The router matches the first route possible, in this case "/{slug}" where slug="create_post".
There are at least two solutions, where the first is the easiest, the second is the one I recommend:
Cut/Paste your showAction to the bottom of your file, in that case router will match /create_post to the createAction first
You can exclude this like: #Route("/{slug}", requirements={"slug" = "^(?<!create_post).+"})

Answer 2

The problem is that you are posting to /create_post which in turn matches the route /{slug}. slug is being set to 'create_post'. With the Symfony 2 router the first match wins and thus your showAction method is called.
Consider setting your ShowAction path to: '/show/{slug}'.
Or you could move your ShowAction down to the bottom of your controller file. That is a bit dangerous because you might forget and add a different action later. But either way will work.