From 9980b12551e9cd5ce59b5e497b6754cf8209654f Mon Sep 17 00:00:00 2001
From: YunaiV <zhijiantianya@gmail.com>
Date: Wed, 3 May 2023 00:30:02 +0800
Subject: [PATCH] =?UTF-8?q?=E8=B0=83=E6=95=B4=E8=B4=AD=E7=89=A9=E8=BD=A6?=
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---
 .../controller/app/cart/vo/AppTradeCartAddReqVO.java      | 2 --
 .../module/trade/service/cart/TradeCartServiceImpl.java   | 8 +++++++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/controller/app/cart/vo/AppTradeCartAddReqVO.java b/yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/controller/app/cart/vo/AppTradeCartAddReqVO.java
index c1e3ebd2f..1018ec9a2 100644
--- a/yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/controller/app/cart/vo/AppTradeCartAddReqVO.java
+++ b/yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/controller/app/cart/vo/AppTradeCartAddReqVO.java
@@ -3,7 +3,6 @@ package cn.iocoder.yudao.module.trade.controller.app.cart.vo;
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Data;
 
-import javax.validation.constraints.Min;
 import javax.validation.constraints.NotNull;
 
 @Schema(description = "用户 App - 购物车添加购物项 Request VO")
@@ -16,7 +15,6 @@ public class AppTradeCartAddReqVO {
 
     @Schema(description = "新增商品数量", required = true, example = "1")
     @NotNull(message = "数量不能为空")
-    @Min(message = "数量必须大于 0", value = 1L)
     private Integer count;
 
     @Schema(description = "是否添加到购物车", required = true, example = "true")
diff --git a/yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/service/cart/TradeCartServiceImpl.java b/yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/service/cart/TradeCartServiceImpl.java
index ffd75a07a..f92068644 100644
--- a/yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/service/cart/TradeCartServiceImpl.java
+++ b/yudao-module-mall/yudao-module-trade-biz/src/main/java/cn/iocoder/yudao/module/trade/service/cart/TradeCartServiceImpl.java
@@ -58,9 +58,15 @@ public class TradeCartServiceImpl implements TradeCartService {
                 cart.getCount() + addReqVO.getCount() : addReqVO.getCount();
         ProductSkuRespDTO sku = checkProductSku(addReqVO.getSkuId(), count);
 
+        // 情况零：特殊，count 小于等于 0，说明前端项目删除
         // 情况一：存在，则进行数量更新
         if (cart != null) {
-            cartMapper.updateById(new TradeCartDO().setId(cart.getId()).setCount(count));
+            // 特殊情况，如果 count 小于等于 0，说明前端想要删除
+            if (count <= 0) {
+                cartMapper.deleteById(cart.getId());
+            } else {
+                cartMapper.updateById(new TradeCartDO().setId(cart.getId()).setCount(count));
+            }
             return cart.getId();
         // 情况二：不存在，则进行插入
         } else {