Sylius CartBundle Symfony2

[inmavf88]

Gracias por contestar!

Sí, eso es lo que no me cuadra... Pongo el código completo de mi ItemResolver por si se me pasa algo:

Código PHP:

<?php
 
namespace etdc\ProductoBundle\Cart;
 
use Sylius\Bundle\CartBundle\Model\CartItemInterface;
use Sylius\Bundle\CartBundle\Resolver\ItemResolverInterface;
use Sylius\Bundle\CartBundle\Resolver\ItemResolvingException;
use Symfony\Component\HttpFoundation\Request;
use Doctrine\ORM\EntityManager;
 
 
class ItemResolver implements ItemResolverInterface
{
    private $entityManager;
 
    public function __construct(EntityManager $entityManager)
    {
        $this->entityManager = $entityManager;
    }
 
    public function resolve(CartItemInterface $item, Request $data)
    {
        $productId = $data->query->get('productId');
 
        // If no product id given, or product not found, we throw exception with nice message.
        if (!$productId || !$product = $this->getProductRepository()->find($productId)) {
            throw new ItemResolvingException('Requested product was not found');
        }
 
        // Assign the product to the item and define the unit price.
        $item->setProduct($product);
        $item->setUnitPrice($product->getPrice());
 
        // Everything went fine, return the item.
        return $item;
    }
 
    private function getProductRepository()
    {
        return $this->entityManager->getRepository('ProductoBundle:Producto');
    }
}