public ActionResult Add(Cart cart, int productId, int quantity)
{
Product product = daoTemplate.FindByID<Product>(productId);
var quantityInCart = cart.CurrentQuantity(productId);
if (quantityInCart + quantity > product.Rest())
{
return Json(new [] {new { Key = "quantity", Value = "Слишком большое количество" }});
}
cart.Add(product, quantity);
return Json(new object[]{});
}
