From ad5db85e540947e82c7a4d5612879b3b3ecdf459 Mon Sep 17 00:00:00 2001
From: liujie <1793218484@qq.com>
Date: 星期五, 21 八月 2026 10:38:07 +0800
Subject: [PATCH] update

---
 backend/src/main/java/com/tourguide/modules/user/mapper/GuideUserMapper.java |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/backend/src/main/java/com/tourguide/modules/user/mapper/GuideUserMapper.java b/backend/src/main/java/com/tourguide/modules/user/mapper/GuideUserMapper.java
index d37320e..3f18848 100644
--- a/backend/src/main/java/com/tourguide/modules/user/mapper/GuideUserMapper.java
+++ b/backend/src/main/java/com/tourguide/modules/user/mapper/GuideUserMapper.java
@@ -3,11 +3,23 @@
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.tourguide.modules.user.entity.GuideUser;
 import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
 import org.apache.ibatis.annotations.Update;
 
 import java.math.BigDecimal;
 
 public interface GuideUserMapper extends BaseMapper<GuideUser> {
+    @Select("SELECT COALESCE(balance, 0) FROM guide_user WHERE id = #{guideId} AND deleted = 0")
+    BigDecimal selectBalance(@Param("guideId") Long guideId);
+
+    @Update("UPDATE guide_user SET balance = balance + #{amount}, updated_at = NOW() " +
+            "WHERE id = #{guideId} AND deleted = 0")
+    int increaseBalance(@Param("guideId") Long guideId, @Param("amount") BigDecimal amount);
+
+    @Update("UPDATE guide_user SET balance = balance - #{amount}, updated_at = NOW() " +
+            "WHERE id = #{guideId} AND deleted = 0 AND balance >= #{amount}")
+    int decreaseBalance(@Param("guideId") Long guideId, @Param("amount") BigDecimal amount);
+
     @Update("UPDATE guide_user SET accepted_order_count = accepted_order_count + 1, " +
             "current_month_order_count = current_month_order_count + 1, updated_at = NOW() " +
             "WHERE id = #{guideId} AND deleted = 0 AND status = 1")

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