public function del(Request $request)
 {
     if (Cart::destroy($request->id)) {
         return response()->json(['status' => 1, 'total_price' => $this->total_price(), 'cart_number' => $this->cart_number()]);
     } else {
         return response()->json(['status' => 2, 'total_price' => $this->total_price(), 'cart_number' => $this->cart_number()]);
     }
 }