1.代客下单 会员支付，负数余额问题

eladmin-system/src/main/java/cn/ysk/cashier/mybatis/mapper/TbMShopUserMapper.java

@@ -37,7 +37,7 @@ public interface TbMShopUserMapper extends BaseMapper<TbShopUser> {
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     Map<String, Object> selectUserSummary(@Param("shopId") String shopId, @Param("isVip") Integer isVip);
 
-    @Update("update tb_shop_user set amount=amount-#{orderAmount}, consume_amount=consume_amount+#{orderAmount} where id=#{vipUserId} and amount >= 0")
+    @Update("update tb_shop_user set amount=amount-#{orderAmount}, consume_amount=consume_amount+#{orderAmount} where id=#{vipUserId} and amount-#{orderAmount} >= 0")
     long decrBalance(@Param("vipUserId") Integer vipUserId, @Param("orderAmount") BigDecimal orderAmount);
 }