Error provide a default value - mongodb

Question

I'm trying to play with MongoDB. But I've got some problems.
# src/Controller/DefaultController.php
public function editCategoryAction(Category $category) {
echo $category->getName();
die();
}
With "entity" this is ok but not with MongoDB.
It displays this error message :
Controller "Site\StoreBundle\Controller\DefaultController::editCategoryAction()" requires that you provide a value for the "$category" argument (because there is no default value or because there is a non optional argument after this one).
My Category Document :
namespace Site\StoreBundle\Document;
use Doctrine\ODM\MongoDB\Mapping\Annotations as MongoDB;
/**
* #MongoDB\Document
*/
class Category
{
/**
* #MongoDB\Id
*/
protected $id;
/**
* #MongoDB\String
*/
protected $name;
/**
* #MongoDB\ReferenceMany(targetDocument="Product")
*/
private $products = array();
public function __contructor() {
$this->products = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* Get id
*
* #return id $id
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* #param string $name
* #return self
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string $name
*/
public function getName()
{
return $this->name;
}
public function getProducts() {
return $this->products;
}
public function __construct()
{
$this->products = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* Add product
*
* #param Site\StoreBundle\Document\Product $product
*/
public function addProduct(\Site\StoreBundle\Document\Product $product)
{
$this->products[] = $product;
}
/**
* Remove product
*
* #param Site\StoreBundle\Document\Product $product
*/
public function removeProduct(\Site\StoreBundle\Document\Product $product)
{
$this->products->removeElement($product);
}
}
My Route
editCategory:
path: /editCategory/{id}
defaults: { _controller: SiteStoreBundle:Default:editCategory }
How can I solve this ?
Edit:
I found this article : http://php-and-symfony.matthiasnoback.nl/2012/10/symfony2-mongodb-odm-adding-the-missing-paramconverter/
I changed my src/Site/StoreBundle/Resources/config/services.yml to this :
parameters:
# site_store.example.class: Site\StoreBundle\Example
services:
doctrine_mongo_db_param_converter:
class: Sensio\Bundle\FrameworkExtraBundle\Request\ParamConverter\DoctrineParamConverter
arguments: ['#doctrine_mongodb']
But same error :/

Answer 1

I think you missed to tag your service:
services:
doctrine_mongo_db_param_converter:
class: Sensio\Bundle\FrameworkExtraBundle\Request\ParamConverter\DoctrineParamConverter
arguments: ['#doctrine_mongodb']
tags:
- { name: request.param_converter, priority: -2, converter: doctrine_mongo_db_param_converter}