outline_designer_book.install in Outline Designer 7.2

Install, update and uninstall functions for the outline_designer module.

File

modules/outline_designer_book/outline_designer_book.install

<?php

/**
 * @file
 * Install, update and uninstall functions for the outline_designer module.
 */

/**
 * Implements hook_update_N().
 *
 * This cleans out book links that might be pointed to deleted nodes.
 * For more information on this issue and the resolution this update hook takes.
 * @see https://www.drupal.org/node/2548975
 */
function outline_designer_book_update_7001(&$sandbox) {

  // look through menu links table for nodes that have been removed
  // but still have references to them and ensure they are removed
  // load all menu items that are in books
  $result = db_select('menu_links', 'ml')
    ->fields('ml', array(
    'link_path',
  ))
    ->condition('menu_name', 'book-toc-%', 'LIKE')
    ->execute()
    ->fetchAll();

  // loop through and load all of the assoicated nodes
  foreach ($result as $item) {
    $nid = str_replace('node/', '', $item->link_path);

    // ensure this points to a node id, almost impossible not to
    if (is_numeric($nid)) {
      $node = node_load($nid);

      // if we weren't able to load a node from this id, it means we need to ax the references to it
      // this happened when an item was bounced around a book outline in outline designer and then
      // deleted via outline designer, leaving traces of where it had been previously.
      if (!$node) {

        // delete the link path for book outlines that is no longer valid
        db_delete('menu_links')
          ->condition('link_path', $item->link_path, '=')
          ->condition('module', 'book', '=')
          ->execute();
        drupal_set_message(t('Cleaned out dated book item reference to the previously deleted @path', array(
          '@path' => $item->link_path,
        )));
      }
    }
  }

  // clear caches so everything rebuilds
  menu_cache_clear_all();
}

Functions

Name	Description
outline_designer_book_update_7001	Implements hook_update_N().