public ActionResult <List <ProductDTO> > GetListAttr(string id)
        {
            if (DataHelper.IsEmptyString(id))
            {
                return(BadRequest());
            }
            //
            var re      = _productModel.GetListAttrDTOs(id);
            var product = GetListProducts().Find(item => item.Id == id);

            if (product != null && product.Discount != 0)
            {
                double disc = product.Discount;
                re.ForEach(item => item.Discount = disc);
            }
            if (re == null)
            {
                return(Problem(statusCode: 500, detail: "Data not exist"));
            }
            return(re);
        }