/**
  * Ensures that there is always a 404 page by checking if there's an
  * instance of ErrorPage with a 404 and 500 error code. If there is not,
  * one is created when the DB is built.
  */
 public function requireDefaultRecords()
 {
     parent::requireDefaultRecords();
     if ($this->class === 'ErrorPage' && SiteTree::config()->create_default_pages) {
         $defaultPages = $this->getDefaultRecords();
         foreach ($defaultPages as $defaultData) {
             $code = $defaultData['ErrorCode'];
             $page = ErrorPage::get()->filter('ErrorCode', $code)->first();
             $pageExists = !empty($page);
             if (!$pageExists) {
                 $page = new ErrorPage($defaultData);
                 $page->write();
                 $page->publish('Stage', 'Live');
             }
             // Check if static files are enabled
             if (!self::config()->enable_static_file) {
                 continue;
             }
             // Ensure this page has cached error content
             $success = true;
             if (!$page->hasStaticPage()) {
                 // Update static content
                 $success = $page->writeStaticPage();
             } elseif ($pageExists) {
                 // If page exists and already has content, no alteration_message is displayed
                 continue;
             }
             if ($success) {
                 DB::alteration_message(sprintf('%s error page created', $code), 'created');
             } else {
                 DB::alteration_message(sprintf('%s error page could not be created. Please check permissions', $code), 'error');
             }
         }
     }
 }