Symfony 2 breadcrumbs based on KnpMenuBundle

base.html.twig

{% block breadcrumbs %}
<div id="breadcrumb">
    {{ knp_menu_render('breadcrumbs', {currentClass: 'active','template': 'ChyriusPublicBundle:Menu:breadcrumb.html.twig'}) }}
</div>
{% endblock %}

breadcrumb.html.twig

{% block root %}
    {% if item.breadcrumbsArray %}
        {%- for  link in item.breadcrumbsArray %}
            {%- if loop.index == 1 %}<a href="/" title="Go to Home" class="tip-bottom"><i class="icon-home"></i> Home</a>
            {%- elseif not loop.last %}<a href="{{ link.uri }}">{{ link.label | trans }}</a>
            {%- else %}
                <a href="{{ link.uri }}" class="current">{{ link.label | trans }}</a>
            {%- endif %}
        {%- endfor %}
    {% endif %}
{% endblock %}

MenuBuilder.php

<?php

namespace Chyrius\PublicBundle\Menu;

use Knp\Menu\FactoryInterface;
use Symfony\Component\HttpFoundation\Request;
use Chyrius\PublicBundle\Menu\RequestVoter;
use Symfony\Component\DependencyInjection\ContainerInterface;

class MenuBuilder
{
    private $factory;

    /**
     * @param FactoryInterface $factory
     */

    public function __construct(FactoryInterface $factory, ContainerInterface $container)
    {
        $this->factory = $factory;
        $this->container = $container;
    }

    public function createMainMenu(Request $request)
    {
        $menu = $this->factory->createItem('root');
        $menu->setLabel('Home');
        $menu->addChild('Dashboard', array('route' => 'dashboard'));
        $menu->addChild('Desk', array('route' => 'desk'));
        $menu->addChild('Statistic', array('route' => 'stat'));
		
        //...
		
        return $menu;
    }


    public function createBreadcrumbsMenu(Request $request) {
    	//
        $bcmenu = $this->createMainMenu($request);
        return $this->getCurrentMenuItem($bcmenu);
    }

    public function getCurrentMenuItem($menu)
    {
        $voter = $this->container->get('chyrius.public.menu.voter.request');
		
        foreach ($menu as $item) {
            if ($voter->matchItem($item)) {
                return $item;
            }
			
            if ($item->getChildren() && $currentChild = $this->getCurrentMenuItem($item)) {
                return $currentChild;
            }
        }
		
        return null;
    }

}

RequestVoter.php

<?php

namespace Chyrius\PublicBundle\Menu;

use Knp\Menu\ItemInterface;
use Knp\Menu\Matcher\Voter\VoterInterface;
use Symfony\Component\DependencyInjection\ContainerInterface;

class RequestVoter implements VoterInterface
{

    private $container;

    public function __construct(ContainerInterface $container)
    {
        $this->container = $container;
    }

    public function matchItem(ItemInterface $item)
    {
        if ($item->getUri() === $this->container->get('request')->getRequestUri()) {
            return true;
        } else {
            if ($item->getUri() !== '/' && (substr(
                $this->container->get('request')->getRequestUri(),
                0,
                strlen($item->getUri())
            ) === $item->getUri())
            ) {
                return true;
            }
        }

        return null;
    }

}

services.yml

services:

  chyrius.public.menu.builder:
      class: Chyrius\Public\Menu\MenuBuilder
      arguments: ["@knp_menu.factory", "@service_container"]

  chyrius.public.menu.main:
      class: Knp\Menu\MenuItem
      factory_service: chyrius.public.menu.builder
      factory_method: createMainMenu
      arguments: ["@request"]
      scope: request
      tags:
          - { name: knp_menu.menu, alias: main }

  chyrius.public.menu.breadcrumbs:
      class: Knp\Menu\MenuItem
      factory_service: chyrius.public.menu.builder
      factory_method: createBreadcrumbsMenu
      arguments: ["@request"]
      scope: request
      tags:
          - { name: knp_menu.menu, alias: breadcrumbs }

  chyrius.public.menu.voter.request:
      class: Chyrius\Public\Menu\RequestVoter
      arguments:
          - @service_container
      tags:
          - { name: knp_menu.voter }

Since version 2.0, getBreadcrumbsArray has been moved to Knp\Menu\Util\MenuManipulator.

Following is the solution added to the above code.

http://stackoverflow.com/a/28851780/75799

have you implemented the fix in your code above?

I'm guessing the following error after using the code above.
Call to a member function get() on null
Error line : $voter = $this->container->get('chyrius.public.menu.voter.request');
Some help ?