function node_access_rebuild

7.x node.module node_access_rebuild($batch_mode = FALSE)

Rebuilds the node access database.

This is occasionally needed by modules that make system-wide changes to access levels. When the rebuild is required by an admin-triggered action (e.g module settings form), calling node_access_needs_rebuild(TRUE) instead of node_access_rebuild() lets the user perform his changes and actually rebuild only once he is done.

Note: As of Drupal 6, node access modules are not required to (and actually should not) call node_access_rebuild() in hook_enable/disable anymore.


$batch_mode: Set to TRUE to process in 'batch' mode, spawning processing over several HTTP requests (thus avoiding the risk of PHP timeout if the site has a large number of nodes). hook_update_N and any form submit handler are safe contexts to use the 'batch mode'. Less decidable cases (such as calls from hook_user, hook_taxonomy, etc...) might consider using the non-batch mode.

See also


Related topics

11 calls to node_access_rebuild()
BookTestCase::setUp in drupal/modules/book/book.test
Sets up a Drupal site for running functional and integration tests.
CommentNodeAccessTest::setUp in drupal/modules/comment/comment.test
Sets up a Drupal site for running functional and integration tests.
FilePrivateTestCase::setUp in drupal/modules/file/tests/file.test
Sets up a Drupal site for running functional and integration tests.
module_disable in drupal/includes/
Disables a given set of modules.
NodeAccessBaseTableTestCase::setUp in drupal/modules/node/node.test
Sets up a Drupal site for running functional and integration tests.

... See full list


drupal/modules/node/node.module, line 3602
The core that allows content to be submitted to the site. Modules and scripts may programmatically submit nodes using the usual form API pattern.


function node_access_rebuild($batch_mode = FALSE) {
  // Only recalculate if the site is using a node_access module.
  if (count(module_implements('node_grants'))) {
    if ($batch_mode) {
      $batch = array(
        'title' => t('Rebuilding content access permissions'),
        'operations' => array(
          array('_node_access_rebuild_batch_operation', array()),
        'finished' => '_node_access_rebuild_batch_finished',
    else {
      // Try to allocate enough time to rebuild node grants

      $nids = db_query("SELECT nid FROM {node}")->fetchCol();
      foreach ($nids as $nid) {
        $node = node_load($nid, NULL, TRUE);
        // To preserve database integrity, only acquire grants if the node
        // loads successfully.
        if (!empty($node)) {
  else {
    // Not using any node_access modules. Add the default grant.
      'nid' => 0,
      'realm' => 'all',
      'gid' => 0,
      'grant_view' => 1,
      'grant_update' => 0,
      'grant_delete' => 0,

  if (!isset($batch)) {
    drupal_set_message(t('Content permissions have been rebuilt.'));