订单折扣问题

付款金额0的问题

cash-common/cash-common-api-config/src/main/java/com/czg/exception/CzgControllerAdvice.java

@@ -95,6 +95,15 @@ public class CzgControllerAdvice {
         return CzgResult.failure(ex.getCode(), ex.getMsg());
     }
 
+    /**
+     * 支付成功
+     * 支付金额为零的统一处理
+     */
+    @ExceptionHandler(PaySuccessException.class)
+    public CzgResult<Object> handlePaySuccessException() {
+        return CzgResult.success();
+    }
+
     /**
      * 处理Hutool的断言抛出异常
      */

cash-common/cash-common-service/src/main/java/com/czg/order/dto/CheckOrderPay.java

@@ -9,6 +9,7 @@ import lombok.NoArgsConstructor;
 
 import java.io.Serializable;
 import java.math.BigDecimal;
+import java.math.RoundingMode;
 import java.util.List;
 
 /**
@@ -93,7 +94,10 @@ public class CheckOrderPay implements Serializable {
     }
 
     public BigDecimal getDiscountRatio() {
-        return discountRatio == null ? BigDecimal.ONE : discountRatio;
+        if (discountRatio == null) {
+            return BigDecimal.ZERO;
+        }
+        return discountRatio.setScale(2, RoundingMode.UP);
     }
 
     public BigDecimal getFullCouponDiscountAmount() {

cash-common/cash-common-tools/src/main/java/com/czg/exception/CzgException.java

@@ -1,5 +1,3 @@
-
-
 package com.czg.exception;
 
 import com.czg.resp.CzgRespCode;

cash-common/cash-common-tools/src/main/java/com/czg/exception/PaySuccessException.java

@@ -0,0 +1,16 @@
+package com.czg.exception;
+
+
+import java.io.Serial;
+
+/**
+ * 自定义异常
+ *
+ * @author admin admin@cashier.com
+ * @since 1.0.0
+ */
+public class PaySuccessException extends RuntimeException {
+	@Serial
+	private static final long serialVersionUID = 1L;
+
+}

cash-service/order-service/src/main/java/com/czg/service/order/service/impl/OrderInfoServiceImpl.java

@@ -242,7 +242,7 @@ public class OrderInfoServiceImpl extends ServiceImpl<OrderInfoMapper, OrderInfo
             }
             param.setUserId(userInfo.getId());
         }
-        if (param.getDiscountRatio().compareTo(BigDecimal.ZERO) <= 0 && param.getDiscountRatio().compareTo(BigDecimal.ONE) > 0) {
+        if (param.getDiscountRatio().compareTo(BigDecimal.ZERO) < 0 || param.getDiscountRatio().compareTo(BigDecimal.ONE) > 0) {
             throw new ValidateException("生成支付订单失败，折扣比例不正确");
         }
         //商品券 <商品id，数量>
@@ -266,16 +266,15 @@ public class OrderInfoServiceImpl extends ServiceImpl<OrderInfoMapper, OrderInfo
             throw new ValidateException("生成支付订单失败，商品优惠券优惠金额不正确");
         }
         orderInfo.setOriginAmount(totalAmount.getPrice());
-        BigDecimal newTotalAmount;
+        BigDecimal newTotalAmount = totalAmount.getPrice();
         //折扣金额 如 9折 计算 为 订单金额*0.9 向上取整
-        if (param.getDiscountRatio().compareTo(BigDecimal.ONE) != 0) {
+        if(param.getDiscountRatio().compareTo(BigDecimal.ZERO) > 0) {
             newTotalAmount = totalAmount.getPrice().multiply(param.getDiscountRatio()).setScale(2, RoundingMode.UP);
-            if (param.getDiscountAmount().compareTo(totalAmount.getPrice().subtract(newTotalAmount)) != 0) {
-                throw new ValidateException("生成支付订单失败，折扣金额不正确");
-            }
-        } else {
-            newTotalAmount = totalAmount.getPrice();
+
+        }else if(param.getDiscountAmount().compareTo(BigDecimal.ZERO) > 0) {
+            newTotalAmount = totalAmount.getPrice().subtract(param.getDiscountAmount());
         }
+
         //满减券 校验
         if (newTotalAmount.compareTo(fullAmount.getPrice()) < 0) {
             throw new ValidateException("生成支付订单失败，满减券不满足条件");

cash-service/order-service/src/main/java/com/czg/service/order/service/impl/PayServiceImpl.java

@@ -12,6 +12,7 @@ import com.czg.config.RedisCst;
 import com.czg.entity.req.*;
 import com.czg.entity.resp.*;
 import com.czg.enums.ShopUserFlowBizEnum;
+import com.czg.exception.PaySuccessException;
 import com.czg.order.dto.CheckOrderPay;
 import com.czg.order.dto.OrderInfoRefundDTO;
 import com.czg.order.entity.OrderDetail;
@@ -89,7 +90,14 @@ public class PayServiceImpl implements PayService {
     private final BigDecimal MONEY_RATE = new BigDecimal("100");
 
     private OrderInfo checkPay(CheckOrderPay checkOrderPay) {
-        return orderInfoService.checkOrderPay(checkOrderPay);
+        OrderInfo orderInfo = orderInfoService.checkOrderPay(checkOrderPay);
+        if (orderInfo.getOrderAmount().compareTo(BigDecimal.ZERO) == 0) {
+            orderInfoService.upOrderInfo(orderInfo, orderInfo.getOrderAmount(),
+                    LocalDateTime.now(), null, PayEnums.CASH_PAY);
+            redisService.del(RedisCst.classKeyExpired.EXPIRED_ORDER + orderInfo.getId());
+            throw new PaySuccessException();
+        }
+        return orderInfo;
     }
 
 

cash-service/order-service/src/main/resources/mapper/CashierCartMapper.xml

@@ -20,7 +20,9 @@
                pros.type                              as productType,
                cart.sku_id                            as skuId,
                skus.spec_info                         as skuName,
-               cart.discount_sale_amount      as discountSaleAmount,
+               case cart.is_gift
+                   when 1 then 0
+                   else cart.discount_sale_amount end as discountSaleAmount,
                case cart.is_gift
                    when 1 then 0
                    else skus.sale_price end           as price,