gistfile1.txt

//////////////////////////////////////////////
services
//////////////////////////////////////////////
parameters:
    class: Home\PageBundle\Entity\Box

services:
  box_form:
    class: Symfony\Component\Form\Form
    factory: ['@form.factory', create ]


  box_handler:
    class: Home\PageBundle\Handler\BoxHandler
    arguments: 
      - "@box_form"
      - "$request"

//////////////////////////////////////////////
controller
//////////////////////////////////////////////  
    
        /**
     * Creates a new box entity.
     *
     * @Route("/new", name="box_new")
     * @Method({"GET", "POST"})
     */
    public function newAction(RequestStack $requestStack)
    {
          $box = new Box();
          $form = $this->get('box_form');
       
          $boxhandler = $this->get('box_handler');
          
          $requestStack->getCurrentRequest()
                  
        if ($boxhandler->process()) {

            $em = $this->getDoctrine()->getManager();
            $em->persist($box);
            $em->flush();
            
            
           return $this->redirectToRoute('box_show', array('id' => $box->getId()));
        }

        return $this->render('box/new.html.twig', array(
            'box' => $box,
            'form' => $boxhandler->getForm()->createView(),
        ));
    }
//////////////////////////////////////////////
handler
//////////////////////////////////////////////
  <?php

namespace Home\PageBundle\Handler;

use Symfony\Component\Form\Form;
use Symfony\Component\HttpFoundation\Request;


class BoxHandler
{
      protected $form;
      protected $request;

      public function __construct(Form $form, Request $request)
      {
          $this->form = $form;
          $this->request = $request;
      }
 
      public function process()
      {
          $this->form->handleRequest($this->request);
              if ($this->form->isSubmitted() && $this->form->isValid())
          {
               return true;
          }
          
          return false;
      }
      
            public function onsucess()
      {
   
      }
      
      public function getForm()
      {
          return $this->form;
      }
}