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   1. drupal6
   2. drupal7

Renders a new parent page select element when the book selection changes.

This function is called via AJAX when the selected book is changed on a node or book outline form. It creates a new parent page select element, adds it to the cached form, and then returns the rendered element so it can be displayed on the form.

Rückgabewert

The rendered parent page select element.

Code

modules/book/book.pages.inc, line 229

<?php
function book_form_update() {
  $bid = $_POST['book']['bid'];
  if ($form = form_get_cache($_POST['form_build_id'], $form_state)) {

    // Validate the bid.
    if (isset($form['book']['bid']['#options'][$bid])) {
      $book_link = $form['#node']->book;
      $book_link['bid'] = $bid;
      // Get the new options and update the cache.
      $form['book']['plid'] = _book_parent_select($book_link);
      form_set_cache($_POST['form_build_id'], $form, $form_state);

      // Build and render the new select element, then return it in JSON format.
      $form_state = array();
      $form['#post'] = array();
      $form = form_builder($form['form_id']['#value'], $form, $form_state);
      $output = drupal_render($form['book']['plid']);
      drupal_json(array('status' => TRUE, 'data' => $output));
    }
    else {
      drupal_json(array('status' => FALSE, 'data' => ''));
    }
  }
  else {
    drupal_json(array('status' => FALSE, 'data' => ''));
  }
  exit();
}
?>