Программно изменять пользовательские панели оформления заказа в зависимости от количества в корзине

Я закончил использовать 2-е решение Энди, используя API полей и комбинированные позиции.

Создайте коллекцию полей с нужными вам полями. Добавьте коллекцию полей с несколькими значениями этого типа в соответствующую строку введите (убедитесь, что он не будет отображаться в форме добавления в корзину). Создайте свою собственную панель оформления заказа, в которой отображается форма редактирования поля.

Поскольку я некоторое время боролся с некоторыми аспектами API, особенно с коллекцией полей , вот мой полный панель оформления заказа .module, может быть, это кому-нибудь поможет.

/**
 * Implements hook_commerce_checkout_pane_info().
 */
function vts_commerce_checkout_pane_info() {

  $panes['paxsup_pane'] = array(
    'title' => t('Other Participants'),
    'base' => 'vts_pane',
    'name' => t('Other Participants'),
    'page' => 'checkout',
    'weight' => -5,
  );

  return $panes;
}

/**
 * Implements hook_pane_checkout_form().
 */
function vts_pane_checkout_form($form, &$form_state, $checkout_pane, $order) { 

  //load the current line item.
  $line_item = commerce_line_item_load($order->commerce_line_items['und'][0]['line_item_id']);

  $pane_form = array();

  if ($checkout_pane['pane_id'] == 'paxsup_pane') {
    field_attach_form('commerce_line_item', $line_item, $pane_form, $form_state, NULL, array('field_name' => 'field_paxsup'));
  }
  return $pane_form;
}

/*
 * Change general GUI edit field cardinality range from 1->1 to 1->20
 */
function vts_form_field_ui_field_edit_form_alter(&$form, &$form_state, $form_id) {
  // Increase the max cardinality to 20
  $range = drupal_map_assoc(range(1, 20));
  $new_options =  array(FIELD_CARDINALITY_UNLIMITED => t('Unlimited')) + $range;

  // Change the options
  $form['field']['cardinality']['#options'] = $new_options;
}

/*
 * Implements hook_form_FORM_ID_alter().
 */
function vts_form_commerce_checkout_form_checkout_alter(&$form, &$form_state, $form_id) {

  //Load line item to get pax number
  $line_item = commerce_line_item_load($form_state['build_info']['args'][0]->commerce_line_items['und'][0]['line_item_id']);
  $paxsup_nb = $line_item->quantity -1;
  if($paxsup_nb > 0){

    //Unset unnecessary items of paxsup field
    for($n=19; $n > $paxsup_nb-1; $n--){
      unset($form['paxsup_pane']['field_paxsup']['und'][$n]);
    }

    //Fill in paxsup with session values
    for($n=0; $n<$paxsup_nb; $n++){ 

      $form['paxsup_pane']['field_paxsup']['und'][$n]['field_paxsup_foo']['und']['#default_value'][0]            = isset($_SESSION['paxsup_foo_'.$n])? $_SESSION['paxsup_foo_'.$n]:'';
      $form['paxsup_pane']['field_paxsup']['und'][$n]['field_paxsup_bar']['und'][0]['value']['#default_value']        = isset($_SESSION['paxsup_bar_'.$n])? $_SESSION['paxsup_bar_'.$n]:'';
      $form['paxsup_pane']['field_paxsup']['und'][$n]['field_paxsup_date_of_birth']['und'][0]['#default_value']['value']  = isset($_SESSION['paxsup_date_of_birth_'.$n])? $_SESSION['paxsup_date_of_birth_'.$n]:'';

    }

  }
  else {
    unset($form['paxsup_pane']);
  }
}

/**
 * Implements hook_pane_checkout_form_validate().
 */
function vts_pane_checkout_form_validate($form, &$form_state, $checkout_pane, $order) {

  $line_item = commerce_line_item_load($order->commerce_line_items['und'][0]['line_item_id']);
  $paxsup_nb = $line_item->quantity -1;
  if($paxsup_nb > 0){

    for($n=0; $n<$paxsup_nb;$n++) {
      if(empty($form_state['values']['field_paxsup']['und'][$n]['field_paxsup_foo']['und'][0]['value'])
        || empty($form_state['values']['field_paxsup']['und'][$n]['field_paxsup_bar']['und'][0]['value']) 
        || empty($form_state['values']['field_paxsup']['und'][$n]['field_paxsup_date_of_birth']['und'][0]['value']) ) {

        return FALSE;
      }
    }
  }

  return TRUE;
}

/**
 * Implements hook_pane_checkout_form_submit().
 */
function vts_pane_checkout_form_submit($form, &$form_state, $checkout_pane, $order) {

  $line_item = commerce_line_item_load($order->commerce_line_items['und'][0]['line_item_id']);
  $paxsup_nb = $line_item->quantity -1;
  if($paxsup_nb > 0){

    //Set paxsup SESSION values
    for($n=0; $n<$paxsup_nb;$n++) { //
      $_SESSION['paxsup_foo_'.$n] = $form_state['values']['field_paxsup']['und'][$n]['field_paxsup_foo']['und'][0]['value'];
      $_SESSION['paxsup_bar_'.$n] = $form_state['values']['field_paxsup']['und'][$n]['field_paxsup_bar']['und'][0]['value']; 
      $_SESSION['paxsup_date_of_birth_'.$n] = $form_state['values']['field_paxsup']['und'][$n]['field_paxsup_date_of_birth']['und'][0]['value']; 
    }

    // Add the paxsup values to the line_item fields 
    if (!empty($form_state['values']['field_paxsup'])) {

      if(0 == count($line_item->field_paxsup)){
        //CREATE A NEW PAXSUP SET
        $entity = entity_load_single('commerce_line_item', $line_item->line_item_id);
        $wrapper = entity_metadata_wrapper('commerce_line_item', $entity);
        $collections = array();        

        for($n=0; $n<$paxsup_nb;$n++) { //
          $fc = entity_create('field_collection_item',  array('field_name' => 'field_paxsup'));
          $fc->setHostEntity('commerce_line_item', $line_item, LANGUAGE_NONE, FALSE);

          $fc->field_paxsup_foo['und'][0] = array('value'=> $form_state['values']['field_paxsup']['und'][$n]['field_paxsup_foo']['und'][0]['value']); 
          $fc->field_paxsup_bar['und'][0] = array('value'=> $form_state['values']['field_paxsup']['und'][$n]['field_paxsup_bar']['und'][0]['value']); 
          $fc->field_paxsup_date_of_birth['und'][0] = array('value'=> $form_state['values']['field_paxsup']['und'][$n]['field_paxsup_date_of_birth']['und'][0]['value']); 

          $fc->save(TRUE);
          $collections[] = $fc;
        }
        //Set the field collection items via the wrapper.
        $wrapper->field_paxsup->set($collections);
        $wrapper->save();

      }
      else {
        //UPDATE FIELD COLLECTION
        for($n=0; $n<$paxsup_nb;$n++) { //

          $fc = entity_load_single('field_collection_item', $line_item->field_paxsup['und'][$n]['value'] );
          $fc->field_paxsup_foo['und'][0] = array('value'=> $form_state['values']['field_paxsup']['und'][$n]['field_paxsup_foo']['und'][0]['value']); 
          $fc->field_paxsup_bar['und'][0] = array('value'=> $form_state['values']['field_paxsup']['und'][$n]['field_paxsup_bar']['und'][0]['value']); 
          $fc->field_paxsup_date_of_birth['und'][0] = array('value'=> $form_state['values']['field_paxsup']['und'][$n]['field_paxsup_date_of_birth']['und'][0]['value']); 
          $fc->save(TRUE);

        }
      }
    }
  }
}

/**
 * Implements hook_pane_review().
 * 
 */
function vts_pane_review($form, $form_state, $checkout_pane, $order) {

  $line_item = commerce_line_item_load($order->commerce_line_items['und'][0]['line_item_id']);
  $paxsup_nb = $line_item->quantity -1;
  if (!empty($line_item->field_paxsup['und'][0])) {

    $view = '';
    for($n=0; $n<$paxsup_nb;$n++) {

      $paxsup = entity_load_single('field_collection_item', $line_item->field_paxsup['und'][$n]['value'] );

      $display = array('label' => 'hidden');
      $foo = field_view_field('field_collection_item', $paxsup, 'field_paxsup_foo', $display);
      $bar = field_view_field('field_collection_item', $paxsup, 'field_paxsup_bar', $display);
      $date = field_view_field('field_collection_item', $paxsup, 'field_paxsup_date_of_birth', $display);

      $view .= '<p>'.$foo[0]['#markup'] .' '. $bar[0]['#markup'] .' '. $prenom[0]['#markup'] .t(', né(e) le '). $date[0]['#markup'] .'</p>';
    }

    return $view;
  } 
}