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); }