I am using Drupal Commerce. Now I have to alter the product price programmatically. After search on google and here, I found some people did it: Alter cart unit price and total amount

Then I made a test by using hook_commerce_cart_order_refresh(). Here is my code:

function mymodule_commerce_cart_order_refresh($order_wrapper){
    foreach ($order_wrapper->commerce_line_items as $delta => $line_item_wrapper) {
        $line_item = $line_item_wrapper->value();
        $qty = $line_item->quantity;

It changed the cart and order line item unit price and line item totoal amont. But the order total will not changed. Still calculated on the old price.

I also notice somebody have the same question:Order Total not updating after I change the line item price , but I don't know that answer how it works. It said using following code:

The solution was to use commerce_price_add_component()

$line_item_wrapper = entity_metadata_wrapper("commerce_line_item", $commerce_line_item);
$line_item_wrapper->commerce_unit_price->data = commerce_price_component_add(
            'amount' => $booking_price,
            'currency_code' => 'AUD',
            'data' => array(),

But I don't know where to use the above code, put in a hook?

Is some one can give me a idea?

1 Answer 1


I'v found the way. Put answer here:

function mymodule_commerce_cart_line_item_refresh($line_item, $order_wrapper){
    $line_item->commerce_unit_price['und']['0']['data']['components']['0']['price']        ['amount']=110;

Because the commerce_order_calculate_total() is based on components, so if you only changed the commerce_unit_price amount is not enough. Must change data also.

  • How to apply in Drupal 8?
    – user9589
    Commented Mar 2, 2020 at 8:09

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