灵兰币支付使用优惠券

src/main/java/com/peanut/modules/book/controller/BuyOrderController.java

@@ -329,6 +329,12 @@ public class BuyOrderController {
                 //消费用户积分并记录用户积分消费记录
                 addEbookToUser(buyOrderProductList, buyOrder, 0);
                 addCourseToUser(buyOrder);
+                //使用优惠券
+                if (buyOrder.getCouponId()!=null&&buyOrder.getCouponId()!=0){
+                    CouponHistory couponHistory = couponHistoryService.getById(buyOrder.getCouponId());
+                    couponHistory.setOrderId(buyOrder.getOrderId());
+                    couponService.useCouponAmount(couponHistory);
+                }
                 //发放优惠卷
                 List<Integer> collect = buyOrderProductService.list(new LambdaQueryWrapper<BuyOrderProduct>()
                         .eq(BuyOrderProduct::getOrderId, buyOrder.getOrderId()))