public function index()
 {
     $attrs = Attribute::orderBy("id", "asc");
     if (!empty(Input::get("attr_name"))) {
         $attrs = $attrs->where("attr", "like", "%" . Input::get("attr_name") . "%");
     }
     $attrs = $attrs->paginate(Config('constants.paginateNo'));
     return view(Config('constants.adminAttrView') . '.index', compact('attrs'));
 }