function system_update_8020

Conditionally enable the new Ban module.

Related topics

File

drupal/core/modules/system/system.install, line 1521

Install, update and uninstall functions for the system module.

Code

function system_update_8020() {
  $blocked_ips_exists = db_query_range('SELECT 1 FROM {blocked_ips}', 0, 1)
    ->fetchField();
  if ($blocked_ips_exists) {

    // Rename the permission name.
    db_update('role_permission')
      ->fields(array(
      'permission' => 'ban IP addresses',
      'module' => 'ban',
    ))
      ->condition('permission', 'block IP addresses')
      ->execute();

    // Rename {blocked_ips} table into {ban_ip}.
    db_rename_table('blocked_ips', 'ban_ip');

    // Remove all references to the removed action callback.
    db_delete('actions')
      ->condition('callback', 'system_block_ip_action')
      ->execute();
    db_delete('actions')
      ->condition('aid', 'system_block_ip_action')
      ->execute();

    // Enable the new Ban module.
    module_enable(array(
      'ban',
    ));
  }
  else {

    // Drop old table.
    db_drop_table('blocked_ips');
  }
}