// Add the nodereference field if it's not present.
  $nodereference_table = content_views_tablename($nodereference_field);
  $nodereference_db_info = content_database_info($nodereference_field);
  $nodereference_column = $nodereference_db_info['columns']['nid']['column'];

  if (!array_key_exists($nodereference_column, $view->display[$display_id]->display_options['fields'])) {
    $view->add_item($display_id, 'field', $nodereference_table, $nodereference_column);
  }