1 file.field.inc file_field_widget_process_multiple($element, &$form_state, $form)

Render API callback: Processes a group of file_generic field elements.

Adds the weight field to each row so it can be ordered and adds a new Ajax wrapper around the entire group so it can be replaced all at once.

This function is assigned as a #process callback in file_field_widget_form().


core/modules/file/file.field.inc, line 884
Field module functionality for the File module.


function file_field_widget_process_multiple($element, &$form_state, $form) {
  $element_children = element_children($element, TRUE);
  $count = count($element_children);

  foreach ($element_children as $delta => $key) {
    if ($key != $element['#file_upload_delta']) {
      $description = _file_field_get_description_from_element($element[$key]);
      $element[$key]['_weight'] = array(
        '#type' => 'weight',
        '#title' => $description ? t('Weight for @title', array('@title' => $description)) : t('Weight for new file'),
        '#title_display' => 'invisible',
        '#delta' => $count,
        '#default_value' => $delta,
    else {
      // The title needs to be assigned to the upload field so that validation
      // errors include the correct widget label.
      $element[$key]['#title'] = $element['#title'];
      $element[$key]['_weight'] = array(
        '#type' => 'hidden',
        '#default_value' => $delta,

  // Add a new wrapper around all the elements for Ajax replacement.
  $element['#prefix'] = '<div id="' . $element['#id'] . '-ajax-wrapper">';
  $element['#suffix'] = '</div>';

  return $element;