Magento - 更新购物车数量变化不起作用

Question

I have added in quantity increment buttons to the cart:

These work to increase the quantity in the qty box,

However I want the whole cart to update each time they press either increase or decrease,

Any ideas?

Thanks,

Reece

Answer 1

You have to make an Ajax call and execute the following functionality:-

   // Product ID and Quantity
    $pid = $_REQUEST['productId'];
    $qnt = $_REQUEST['qty'];
    $cart = Mage::getSingleton('checkout/cart');
    $items = $cart->getItems(); 
    foreach ($items as $item) :
        if($pid == $item->getId()) :
            echo $item->getQty();
            $item->setQty($qnt); 
            $cart->save();
        endif;
    endforeach;     

This is just an example, you need to manage the variables according to your need. Whenever button is press just make a ajax call and update cart and then you need to update it via Ajax in other place where you want. Above code provide you the way to save product quantity to cart.