public function searchNewClass(Request $request)
 {
     $this->setMetadata('Lớp mới');
     $status = $request->input('status');
     $newclass = null;
     $limit = Config::findByKey('rows_per_page_article')->first()->value;
     if (is_null($status) || $status == "") {
         $newclass = NewClass::where('is_publish', 1)->orderBy('priority')->paginate($limit);
     } else {
         $newclass = NewClass::where('is_publish', 1)->where('status', $status)->orderBy('priority')->paginate($limit);
     }
     return view('frontend.sites.newClass', ['newclass' => $newclass]);
 }