как изменить количество продуктов с помощью ajax?

Я использую Drupal 7 и модуль Commerce. У меня есть корзина с отображаемым счетчиком:

Это код hook_block_info

function commerce_popup_cart_block_info() {
$blocks = array();
// Define the basic shopping cart block and hide it on the checkout   pages.
$blocks['commerce_popup_cart'] = array(
'info' => t('Popup Shopping cart'),
'cache' => DRUPAL_NO_CACHE,
'visibility' => 0,
);
return $blocks;
}

Но количество товаров над этой корзиной не меняется, когда я добавляю новые товары (хотя новые товары действительно отображаются в корзине правильно). У меня есть следующий код, который отвечает за изменения внутри карты:

function _commerce_popup_cart_add_to_cart_ajax_callback($form, $form_state) {
commerce_cart_add_to_cart_form_submit($form, $form_state); //Call the add to cart form to actually add the product
$res = _commerce_popup_cart_ajax_cart_reload(); //Retrieve the new cart view

$commands = array();
$commands[] = ajax_command_replace("#block-commerce-popup-cart-commerce-popup-cart .cart-empty-block", "<div class='cart-contents'></div>");
$commands[] = ajax_command_html('#block-commerce-popup-cart-commerce-popup-cart .cart-contents', $res);
}

function _commerce_popup_cart_ajax_cart_reload() {
global $user;
$view_name = 'commerce_cart_block'; // The name of the view we are going to load commerce_cart_block
$args = array(commerce_cart_order_id($user->uid));  // Array of arguments we set for the view. Only one argument in our example. your actual view may require additional arguments which you may need to set

$displayId = 'default'; // The display id of for the view.

// Call the views_embed_view function to returned themed view output
$res = views_embed_view($view_name, $displayId, $args);

return $res;
}

Это код блока, содержащего изображение:

function commerce_popup_cart_block_view($delta='') {
$block = array();

switch($delta) {
case 'commerce_popup_cart':
global $user;
// Default to an empty cart block message.
$content = '';

// First check to ensure there are products in the shopping cart.
if ($order = commerce_cart_order_load($user->uid)) {
$wrapper = entity_metadata_wrapper('commerce_order', $order);

// Build the variables array to send to the cart block template.
$variables = array(
'order' => $order,
'contents_view' => commerce_embed_view('commerce_cart_block', 'defaults', array($order->order_id), $_GET['q']),
);
$count = commerce_line_items_quantity($wrapper->commerce_line_items, commerce_product_line_item_types());

$quantity = 0;

foreach ($wrapper->commerce_line_items as $line_item) {
if (!$line_item instanceof EntityMetadataWrapper) {
$line_item = entity_metadata_wrapper('commerce_line_item', $line_item);
}
$types = array('product');

if (empty($types) || in_array($line_item->type->value(), $types)) {
$quantity = $quantity + $line_item->quantity->value();
}
}

$prod_count = t($quantity);

if ($prod_count > 0){
$icon = '<div class="cart-icon"></div><span class="cart_popup_count">'. $prod_count . '</span>';
$content = '<div id="cart-popup" style="display:none;">' . theme('commerce_cart_block', $variables) . '<div class="popup-arrow"></div></div>';
$content = '<div class="wrapper">' . $icon . $content . '</div>';
}elseif (variable_get('commerce_popup_cart_show_empty_cart', 0) == 1){
$content = commerce_popup_cart_block_view_get_empty_cart($variables);
}
}elseif (variable_get('commerce_popup_cart_show_empty_cart', 0) == 1){
$content = commerce_popup_cart_block_view_get_empty_cart($variables = array());
}

// If the superfish module is not installed then add hoverintent script
if (!module_exists('superfish')){
drupal_add_js(drupal_get_path('module','commerce_popup_cart') . '/js/jquery.hoverIntent.minified.js');
}

return array('subject' => t('Shopping cart'), 'content' => $content);
break;
}
return $block;
}