<?php

namespace Webmuch\CartBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
use Symfony\Component\HttpFoundation\Response;

use Webmuch\ProductBundle\Entity\Product;

/**
 * @Route("/cart")
 */
class CartController extends Controller
{
/**
 * @Route("/", name="cart")
 */
public function indexAction()
{
    // get the cart from  the session
    $session = $this->getRequest()->getSession();
    // $cart = $session->set('cart', '');
    $cart = $session->get('cart', array());

    // $cart = array_keys($cart);
    // print_r($cart); die;

    // fetch the information using query and ids in the cart
    if( $cart != '' ) {

        foreach( $cart as $id => $quantity ) {
                  $productIds[] = $id;

        }           

        if( isset( $productIds ) )
        {
            $em = $this->getDoctrine()->getEntityManager();
            $product = $em->getRepository('WebmuchProductBundle:Product')->findById( $productIds );
        } else {
            return $this->render('WebmuchCartBundle:Cart:index.html.twig', array(
                'empty' => true,
            ));
        }



        return $this->render('WebmuchCartBundle:Cart:index.html.twig',     array(
            'product' => $product,
        ));
    } else {
        return $this->render('WebmuchCartBundle:Cart:index.html.twig',     array(
            'empty' => true,
        ));
    }
}


/**
 * @Route("/add/{id}", name="cart_add")
 */
public function addAction($id)
{
    // fetch the cart
    $em = $this->getDoctrine()->getEntityManager();
    $product = $em->getRepository('WebmuchProductBundle:Product')->find($id);
    //print_r($product->getId()); die;
    $session = $this->getRequest()->getSession();
    $cart = $session->get('cart', array());


    // check if the $id already exists in it.
    if ( $product == NULL ) {
         $this->get('session')->setFlash('notice', 'This product is not     available in Stores');          
        return $this->redirect($this->generateUrl('cart'));
    } else {
        if( isset($cart[$id]) ) {

            $qtyAvailable = $product->getQuantity();

            if( $qtyAvailable >= $cart[$id]['quantity'] + 1 ) {
                $cart[$id]['quantity'] = $cart[$id]['quantity'] + 1; 
            } else {
                $this->get('session')->setFlash('notice', 'Quantity     exceeds the available stock');          
                return $this->redirect($this->generateUrl('cart'));
            }
        } else {
            // if it doesnt make it 1
            $cart = $session->get('cart', array());
            $cart[$id] = $id;
            $cart[$id]['quantity'] = 1;
        }

        $session->set('cart', $cart);
        return $this->redirect($this->generateUrl('cart'));

    }
}


/**
 * @Route("/remove/{id}", name="cart_remove")
 */
public function removeAction($id)
{
    // check the cart
    $session = $this->getRequest()->getSession();
    $cart = $session->get('cart', array());

    // if it doesn't exist redirect to cart index page. end
    if(!$cart) { $this->redirect( $this->generateUrl('cart') ); }

    // check if the $id already exists in it.
    if( isset($cart[$id]) ) {
        // if it does ++ the quantity
        $cart[$id]['quantity'] = '0';
        unset($cart[$id]);
        //echo $cart[$id]['quantity']; die();
    } else {
        $this->get('session')->setFlash('notice', 'Go to hell');    
        return $this->redirect( $this->generateUrl('cart') );
    }

    $session->set('cart', $cart);

    // redirect(index page)
    $this->get('session')->setFlash('notice', 'This product is Remove');
    return $this->redirect( $this->generateUrl('cart') );
}
}

{% block body %}
<h1>"FLAIRBAG" SHOPPING-CART</h1>

<ul class="thumbnails">

{% if empty %}
<h5>Your shopping cart is empty.</h5>
{% endif %}
{% set cart = app.session.get('cart') %}


{% if product %}


<ul class="thumbnails">
{% if app.session.hasFlash('notice') %} 

 <divclass="flash-notice">

  {{app.session.flash('notice') }} 
  {{ app.session.removeFlash('notice') }}

 </div>

{% endif %}         
{% for key, item in cart %}
    <p>ID:{{ key }}</p>
     <p>Quantity:{{ item }}</p>
     <button class="btn btn-primary"><a href="{{ path('cart_remove', {'id':     key}) }}">Remove</a></button>

   {% for item in product %}
        <p>{{ item.title }}</p>
    <p>{{ item.preview }}</p>
{% endfor %}



{% endfor %}
</ul>

{% endif %}
</ul>

<a href="{{ path('products') }}">Products</a>

{% endblock %}

请帮我解决这个问题。

谢谢!感谢您的帮助。