• I have the Payment and Shipping service block in the same checkout pane.
• I update the Shipping service block with AJAX when selecting a Payment method, as available Shipping services depend on the selected Payment method.

But once the Shipping service block is reloaded, if I select another Shipping service and submit the form, I will be redirected to the initial pane as if my selection was unvalid – with no error message.

This is the code I use to update the Shipping services block, after saving the order to update the available Shipping services. (Inspired by some other posts)

And I can’t find a way to make the Shipping selection work on submit after being reloaded via AJAX.

• Should I also update the form state?
• commerce_shipping_service_rate_order($service, $order) didn’t change anything
• Nor commerce_shipping_pane_service_details_refresh($form, $form_state)

Would someone have an idea what could go wrong?

/**  * Alter checkout shipping form.  */ function mymodule_checkout_shipping_alter(&$form, &$form_state) {     // Replace AJAX callback by a custom one.     $form['commerce_payment']['payment_method']['#ajax']['callback'] = 'mymodule_payment_pane_checkout_form_details_refresh'; }   /**  * Checkout shipping pane AJAX callback function.  */ function mymodule_payment_pane_checkout_form_details_refresh($form, &$form_state) {     // Commands initialization.     $commands = array();     // Load the current order     $order_id = $form_state['order']->order_id;     $order = commerce_order_load($order_id);      // Set the newly selected payment option to the order     $order->data['payment_method'] = $form['commerce_payment']['payment_method']['#default_value'];     // Refresh the current order (more specific: update it's line items     commerce_cart_order_refresh($order);     // save the refreshed order (more specific: recalculate the order total and save it)     commerce_order_save($order);      // Default Commerce AJAX callback for the payment pane.     $commerce_wrapper = '#' . $form_state['triggering_element']['#ajax']['wrapper'];     $commerce_output = commerce_payment_pane_checkout_form_details_refresh($form, $form_state);     $commands[] = ajax_command_replace($commerce_wrapper, render($commerce_output));      // Update Commerce shipping pane.     $panes = commerce_checkout_panes();     $shipping_pane = drupal_get_form('commerce_shipping_pane_checkout_form', $panes['commerce_shipping'], $order);     $form['commerce_shipping']['shipping_rates'] = $shipping_pane['shipping_rates'];     $form['commerce_shipping']['shipping_service'] = $shipping_pane['shipping_service'];     $form['commerce_shipping']['service_details'] = $shipping_pane['service_details'];     $commands[] = ajax_command_replace('#commerce-shipping-service-ajax-wrapper', drupal_render($form['commerce_shipping']));    return array('#type' => 'ajax', '#commands' => $commands); }