Refresh cached shipping methods on checkout update ajax event in Woocommerce

Question

i just implemented a custom shipping solution.

It depends on the total price of items in the cart. For example:

if total is < 20   -> display free shipping
if total is >= 20  -> paid delivery

But i have a problem with woocommerce cache...I think that the fact is that woocommerce caches shipping rates, not taking in account order qty change. So is the problem is with the calculate_shipping_for_package() method?

If I enable shipping debug mode everything works just right, without it got no updates.

I tried to disable cache, without success with.

add_action('woocommerce_checkout_update_order_review', function() {
    $packages = WC()->cart->get_shipping_packages();
    foreach ($packages as $key => $value) {
        $shipping_session = "shipping_for_package_$key";
        unset(WC()->session->$shipping_session);
    }
}, 10, 2);

So. Do you ever had this kind of problem? How did you solve? Thanks a lot for any help!

Answer 1

Updated: There is some mistakes in your code, instead try the following:

add_action('woocommerce_checkout_update_order_review', 'checkout_update_refresh_shipping_methods', 10, 1);
function checkout_update_refresh_shipping_methods( $post_data ) {
    $packages = WC()->cart->get_shipping_packages();
    foreach ($packages as $package_key => $package ) {
         WC()->session->set( 'shipping_for_package_' . $package_key, false ); // Or true
    }
}

Code goes in function.php file of your active child theme (active theme). Tested and works.

But it will refresh shipping methods cache each time on ajax checkout update event.

Related: Custom checkout field and shipping methods ajax interaction in Woocommerce 3