修复加减分失败但计入记录和添加导出功能

backend/services/attendance_service.py

@@ -75,10 +75,15 @@ class AttendanceService:
                 points_change = -settings.DEDUCTION_ATTENDANCE_LATE
             else:
                 points_change = -settings.DEDUCTION_ATTENDANCE_LEAVE
-            
             # 创建扣分记录
             student = await StudentModel.get_by_id(student_id)
             if student:
+                # 检查分数是否会超出范围（防止溢出）
+                current_points = student.get("total_points", 0)
+                new_points = current_points + points_change
+                if new_points < 0:
+                    return {"success": False, "message": f"分数不能为负（当前{current_points}，扣{abs(points_change)}）"}
+                
                 # 获取操作人姓名
                 user = await UserModel.get_by_user_id(recorder_id)
                 recorder_name = user.get("real_name", "班主任") if user else "班主任"
@@ -99,6 +104,7 @@ class AttendanceService:
                 
                 # 标记已应用扣分
                 await AttendanceModel.mark_deduction_applied(attendance_id)
+                await AttendanceModel.mark_deduction_applied(attendance_id)
         
         logger.info(f"用户[{recorder_id}] 添加考勤记录[{attendance_id}] -> {status}")
         

backend/services/conduct_service.py

@@ -80,6 +80,18 @@ class ConductService:
                     fail_count += 1
                     continue
                 
+                # 检查分数是否会超出范围（防止溢出）
+                current_points = student.get("total_points", 0)
+                new_points = current_points + points_change
+                if new_points < 0:
+                    details.append({"student_id": student_id, "error": f"分数不能为负（当前{current_points}，操作{points_change}）"})
+                    fail_count += 1
+                    continue
+                if new_points > 100:
+                    details.append({"student_id": student_id, "error": f"分数不能超过100（当前{current_points}，操作{points_change}）"})
+                    fail_count += 1
+                    continue
+                
                 # 创建记录
                 record_id = await ConductModel.create_record(
                     student_id=student_id,
@@ -102,7 +114,7 @@ class ConductService:
                 fail_count += 1
         
         return {
-            "success": True,
+            "success": fail_count == 0,
             "success_count": success_count,
             "fail_count": fail_count,
             "details": details