/**
  * Display a listing of the resource.
  *
  * @return \Illuminate\Http\Response
  */
 public function index(Request $request)
 {
     if ($request->has('search')) {
         $categories = Category::where('id', 'LIKE', "%" . $request->input('search') . "%")->orWhere('category_name', 'LIKE', "%" . $request->input('search') . "%")->paginate(5);
     } else {
         if ($request->has('sortby')) {
             $categories = Category::orderBy($request->input('sortby'))->paginate(5);
         } else {
             $categories = Category::paginate(5);
         }
     }
     $categories->setPath(url() . '/back/category');
     return view('pages.admin.category.list', ['categories' => $categories]);
 }