修复学期功能

.gitignore

@@ -1,5 +1,7 @@
 # 环境变量
 .env
+backend/.env
+frontend/.env
 
 # Python
 __pycache__/

backend/.env.example

@@ -1,3 +1,14 @@
+# ===========================================
+# 班级操行分管理系统 - 前端配置
+# 
+# 开发者: Canglan
+# 联系方式: admin@sea-studio.top
+# 版权归属: Sea Network Technology Studio
+# 许可证: MIT License
+# 
+# 版权所有 © Sea Network Technology Studio
+# ===========================================
+
 # ===========================================
 # FastAPI 应用配置
 # ===========================================
@@ -94,7 +105,7 @@ MONITOR_MAX_ADD=5
 # 班长单次扣分上限（负数）
 MONITOR_MAX_SUBTRACT=-5
 
-# 学习委员单次加减分上限（绝对值）- 正负均不可超过此值
+# 学习委员单次加减分上限（绝对值）
 STUDY_COMMISSIONER_MAX_POINTS=5
 
 # 考勤委员单次扣分上限（绝对值）

backend/models/semester.py

@@ -51,14 +51,26 @@ class SemesterModel:
     
     @staticmethod
     async def get_active() -> Optional[Dict[str, Any]]:
-        """获取当前活跃学期"""
-        sql = """
-            SELECT semester_id, semester_name, start_date, end_date,
-                   is_active, is_archived, created_at
+        """获取当前活跃学期（优先 is_active 标记，降级为日期范围匹配）"""
+        fields = "semester_id, semester_name, start_date, end_date, is_active, is_archived, created_at"
+        # 第一优先级：is_active 标记
+        sql = f"""
+            SELECT {fields}
             FROM semesters
             WHERE is_active = 1 AND is_archived = 0
             LIMIT 1
         """
+        result = await execute_one(sql)
+        if result:
+            return result
+        # 第二优先级：日期范围匹配
+        # 注：无日期的学期不会自动匹配为活跃学期（需手动激活）
+        sql = f"""
+            SELECT {fields}
+            FROM semesters
+            WHERE is_archived = 0 AND start_date <= CURDATE() AND (end_date IS NULL OR end_date >= CURDATE())
+            LIMIT 1
+        """
         return await execute_one(sql)
     
     @staticmethod
@@ -103,6 +115,29 @@ class SemesterModel:
         result = await execute_one(sql, (record_id,))
         return result['semester_id'] if result else None
     
+    @staticmethod
+    async def get_attendance_stats_by_semester(semester_id: int, start_date: str, end_date: str) -> List[Dict]:
+        """批量查询学期内所有学生的考勤统计"""
+        sql = """
+            SELECT student_id, status, COUNT(*) as cnt
+            FROM attendance_records
+            WHERE (semester_id = %s OR (semester_id IS NULL AND `date` BETWEEN %s AND %s))
+            GROUP BY student_id, status
+        """
+        return await execute_query(sql, (semester_id, start_date, end_date))
+    
+    @staticmethod
+    async def get_homework_stats_by_date_range(start_date: str, end_date: str) -> List[Dict]:
+        """通过作业截止日期范围查询所有学生的作业提交统计"""
+        sql = """
+            SELECT hs.student_id, hs.status, COUNT(*) as cnt
+            FROM homework_submissions hs
+            JOIN assignments a ON hs.assignment_id = a.assignment_id
+            WHERE a.deadline BETWEEN %s AND %s
+            GROUP BY hs.student_id, hs.status
+        """
+        return await execute_query(sql, (start_date, end_date))
+
 
 class SemesterArchiveModel:
     """学期归档快照数据模型"""
@@ -114,25 +149,39 @@ class SemesterArchiveModel:
             return 0
         sql = """
             INSERT INTO semester_archives
-            (semester_id, student_id, student_no, student_name, final_points, rank_position, total_students)
-            VALUES (%s, %s, %s, %s, %s, %s, %s)
+            (semester_id, student_id, student_no, student_name, final_points, rank_position, total_students,
+             attendance_present, attendance_absent, attendance_late, attendance_leave,
+             homework_submitted, homework_not_submitted, homework_late)
+            VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s)
         """
         params_list = [
             (
                 a['semester_id'], a['student_id'], a['student_no'],
                 a['student_name'], a['final_points'],
-                a.get('rank_position'), a.get('total_students')
+                a.get('rank_position', 0), a.get('total_students', 0),
+                a.get('attendance_present', 0), a.get('attendance_absent', 0),
+                a.get('attendance_late', 0), a.get('attendance_leave', 0),
+                a.get('homework_submitted', 0), a.get('homework_not_submitted', 0),
+                a.get('homework_late', 0)
             )
             for a in archives_data
         ]
         return await execute_many(sql, params_list)
     
+    @staticmethod
+    async def delete_by_semester(semester_id: int) -> int:
+        """删除指定学期的所有归档数据（用于归档操作的幂等性）"""
+        sql = "DELETE FROM semester_archives WHERE semester_id = %s"
+        return await execute_update(sql, (semester_id,))
+    
     @staticmethod
     async def get_by_semester(semester_id: int) -> List[Dict[str, Any]]:
         """获取学期的归档数据"""
         sql = """
             SELECT archive_id, semester_id, student_id, student_no,
-                   student_name, final_points, rank_position, total_students, archived_at
+                   student_name, final_points, rank_position, total_students,
+                   attendance_present, attendance_absent, attendance_late, attendance_leave,
+                   homework_submitted, homework_not_submitted, homework_late, archived_at
             FROM semester_archives
             WHERE semester_id = %s
             ORDER BY rank_position ASC
@@ -156,7 +205,10 @@ class SemesterArchiveModel:
         sql = """
             SELECT sa.archive_id, sa.semester_id, sa.student_id, sa.student_no,
                    sa.student_name, sa.final_points, sa.rank_position,
-                   sa.total_students, sa.archived_at,
+                   sa.total_students, sa.attendance_present, sa.attendance_absent,
+                   sa.attendance_late, sa.attendance_leave,
+                   sa.homework_submitted, sa.homework_not_submitted, sa.homework_late,
+                   sa.archived_at,
                    s.semester_name, s.start_date, s.end_date
             FROM semester_archives sa
             JOIN semesters s ON sa.semester_id = s.semester_id

backend/services/semester_service.py

@@ -9,6 +9,7 @@
 # 版权所有 © Sea Network Technology Studio
 # ===========================================
 
+import datetime
 from typing import Dict, Any, List, Optional
 
 from models.semester import SemesterModel, SemesterArchiveModel
@@ -49,20 +50,41 @@ class SemesterService:
             return {"success": False, "message": "学期名称不能为空"}
         
         try:
-            # 自动将之前的活跃学期设为非活跃
-            await SemesterModel.deactivate_all()
-            
-            # 创建新学期并自动设为活跃
+            # 创建学期（不预先 deactivate_all）
             semester_id = await SemesterModel.create(
                 semester_name=semester_name.strip(),
                 start_date=start_date,
                 end_date=end_date
             )
             
-            # 设为活跃学期
-            await SemesterModel.activate(semester_id)
+            # 判断新学期的日期范围是否包含今天，决定是否自动激活
+            should_activate = False
+            if start_date is not None:
+                try:
+                    today = datetime.date.today()
+                    s_date = datetime.datetime.strptime(start_date, "%Y-%m-%d").date()
+                    e_date = (
+                        datetime.datetime.strptime(end_date, "%Y-%m-%d").date()
+                        if end_date is not None
+                        else None
+                    )
+                    if s_date <= today and (e_date is None or e_date >= today):
+                        should_activate = True
+                except (ValueError, TypeError):
+                    should_activate = False
             
-            logger.info(f"用户[{operator_id}] 创建了新学期: {semester_name}")
+            if should_activate:
+                # 日期范围包含今天，自动激活
+                await SemesterModel.deactivate_all()
+                await SemesterModel.activate(semester_id)
+                logger.info(
+                    f"用户[{operator_id}] 创建并激活新学期: {semester_name}"
+                )
+            else:
+                # 补录历史学期或未来学期，不激活
+                logger.info(
+                    f"用户[{operator_id}] 创建补录学期（未激活）: {semester_name}"
+                )
             
             return {
                 "success": True,
@@ -120,6 +142,11 @@ class SemesterService:
             if semester['is_archived']:
                 return {"success": False, "message": "该学期已归档"}
             
+            # 校验开始日期：无 start_date 时作业统计会全部归零
+            start_date = semester.get('start_date')
+            if not start_date:
+                return {"success": False, "message": "学期未设置开始日期，无法进行归档"}
+            
             # 获取所有活跃学生及其当前分数
             students = await StudentModel.get_all(include_disabled=False)
             if not students:
@@ -127,12 +154,60 @@ class SemesterService:
             
             total_students = len(students)
             
+            # 获取学期的日期范围，用于查询考勤和作业统计
+            end_date = semester.get('end_date') or datetime.date.today().isoformat()
+            
+            # 批量查询考勤和作业统计
+            attendance_stats = await SemesterModel.get_attendance_stats_by_semester(
+                semester_id, start_date, end_date
+            )
+            homework_stats = await SemesterModel.get_homework_stats_by_date_range(
+                start_date, end_date
+            )
+            
+            # 构建 attendance_map: {student_id: {status_field: cnt, ...}}
+            attendance_map = {}
+            for stat in attendance_stats:
+                sid = stat['student_id']
+                if sid not in attendance_map:
+                    attendance_map[sid] = {
+                        'attendance_present': 0, 'attendance_absent': 0,
+                        'attendance_late': 0, 'attendance_leave': 0
+                    }
+                status_key = {
+                    'present': 'attendance_present',
+                    'absent': 'attendance_absent',
+                    'late': 'attendance_late',
+                    'leave': 'attendance_leave'
+                }.get(stat['status'])
+                if status_key:
+                    attendance_map[sid][status_key] = stat['cnt']
+            
+            # 构建 homework_map: {student_id: {status_field: cnt, ...}}
+            homework_map = {}
+            for stat in homework_stats:
+                sid = stat['student_id']
+                if sid not in homework_map:
+                    homework_map[sid] = {
+                        'homework_submitted': 0, 'homework_not_submitted': 0,
+                        'homework_late': 0
+                    }
+                status_key = {
+                    'submitted': 'homework_submitted',
+                    'not_submitted': 'homework_not_submitted',
+                    'late': 'homework_late'
+                }.get(stat['status'])
+                if status_key:
+                    homework_map[sid][status_key] = stat['cnt']
+            
             # 按分数降序排列以计算排名
             sorted_students = sorted(students, key=lambda s: s['total_points'], reverse=True)
             
             # 构建归档快照数据
             archives_data = []
             for rank, student in enumerate(sorted_students, 1):
+                att = attendance_map.get(student['student_id'], {})
+                hw = homework_map.get(student['student_id'], {})
                 archives_data.append({
                     'semester_id': semester_id,
                     'student_id': student['student_id'],
@@ -140,10 +215,17 @@ class SemesterService:
                     'student_name': student['name'],
                     'final_points': student['total_points'],
                     'rank_position': rank,
-                    'total_students': total_students
+                    'total_students': total_students,
+                    'attendance_present': att.get('attendance_present', 0),
+                    'attendance_absent': att.get('attendance_absent', 0),
+                    'attendance_late': att.get('attendance_late', 0),
+                    'attendance_leave': att.get('attendance_leave', 0),
+                    'homework_submitted': hw.get('homework_submitted', 0),
+                    'homework_not_submitted': hw.get('homework_not_submitted', 0),
+                    'homework_late': hw.get('homework_late', 0),
                 })
-            
-            # 保存归档快照
+            # 删除已有的归档数据以保证幂等性，再保存归档快照
+            await SemesterArchiveModel.delete_by_semester(semester_id)
             await SemesterArchiveModel.batch_create(archives_data)
             
             # 标记学期为已归档

frontend/admin/dashboard.php

@@ -35,9 +35,16 @@ include __DIR__ . '/../includes/header.php';
     <div class="card">
         <div class="card-title">操行分排行榜</div>
         <div class="table-wrapper">
+            <div style="display: flex; align-items: center; margin-bottom: 12px; gap: 8px;">
+                <span style="font-size: 14px; color: #666;">显示前</span>
+                <input type="number" id="percentileFilter" style="width: 70px; padding: 4px 8px; border: 1px solid #ddd; border-radius: 4px;" min="1" max="100" value="100" placeholder="1-100">
+                <span style="font-size: 14px; color: #666;">% 的学生</span>
+                <button class="btn btn-sm" style="background: #667eea; color: white;" onclick="applyPercentileFilter()">筛选</button>
+                <button class="btn btn-sm" style="border: 1px solid #ccc; color: #666;" onclick="resetPercentileFilter()">显示全部</button>
+            </div>
             <table class="table">
                 <thead>
-                    <tr><th>排名</th><th>学号</th><th>姓名</th><th>操行分</th><th>前%</th></tr>
+                    <tr><th>排名</th><th>学号</th><th>姓名</th><th>操行分</th></tr>
                 </thead>
                 <tbody id="rankingList"></tbody>
             </table>
@@ -46,6 +53,8 @@ include __DIR__ . '/../includes/header.php';
 </div>
 
 <script>
+var totalStudents = 0;
+
 async function loadDashboard() {
     const studentsRes = await apiGet('/api/admin/students');
     if (studentsRes && studentsRes.success) {
@@ -69,30 +78,51 @@ async function loadDashboard() {
     
     const rankingRes = await apiGet('/api/student/ranking', { limit: 100 });
     if (rankingRes && rankingRes.success) {
-        const totalStudents = rankingRes.data.total_students || 0;
+        totalStudents = rankingRes.data.total_students || 0;
         let html = '';
         rankingRes.data.ranking.forEach((student, index) => {
             const rank = index + 1;
-            let percentile = '--';
-            if (totalStudents > 0) {
-                const pct = Math.floor(rank / totalStudents * 100);
-                percentile = (pct === 0 ? 1 : pct) + '%';
-            }
             html += `<tr>
                 <td>${rank}</td>
                 <td>${escapeHtml(student.student_no)}</td>
                 <td>${escapeHtml(student.name)}</td>
                 <td>${student.total_points}</td>
-                <td>前${percentile}</td>
             </tr>`;
         });
         if (rankingRes.data.ranking.length === 0) {
-            html = '<tr><td colspan="5" style="text-align:center;">暂无数据</td></tr>';
+            html = '<tr><td colspan="4" style="text-align:center;">暂无数据</td></tr>';
         }
         document.getElementById('rankingList').innerHTML = html;
     }
 }
 
+document.getElementById('percentileFilter').addEventListener('keypress', function(e) {
+    if (e.key === 'Enter') applyPercentileFilter();
+});
+
+function applyPercentileFilter() {
+    const input = document.getElementById('percentileFilter');
+    const percentile = parseInt(input.value);
+    if (isNaN(percentile) || percentile < 1 || percentile > 100) {
+        showToast('请输入 1-100 之间的整数', 'error');
+        return;
+    }
+    const rows = document.getElementById('rankingList').querySelectorAll('tr');
+    if (rows.length === 0) return;
+    const showCount = Math.ceil(totalStudents * (percentile / 100));
+    rows.forEach(function(row, index) {
+        row.style.display = index < showCount ? '' : 'none';
+    });
+}
+
+function resetPercentileFilter() {
+    document.getElementById('percentileFilter').value = 100;
+    const rows = document.getElementById('rankingList').querySelectorAll('tr');
+    rows.forEach(function(row) {
+        row.style.display = '';
+    });
+}
+
 loadDashboard();
 </script>
 <script src="/assets/js/admin.js"></script>

frontend/admin/semesters.php

@@ -64,16 +64,20 @@ include __DIR__ . '/../includes/header.php';
                 <label>学期名称 <span style="color:red;">*</span></label>
                 <input type="text" id="semesterName" required placeholder="如：2025春季学期" maxlength="100">
             </div>
+            <div style="margin-bottom: 8px;">
+                <button type="button" class="btn btn-sm" style="border: 1px solid #667eea; color: #667eea; margin-right: 6px;" onclick="fillSemesterDates('upper')">上学期（9月-次年2月）</button>
+                <button type="button" class="btn btn-sm" style="border: 1px solid #667eea; color: #667eea;" onclick="fillSemesterDates('lower')">下学期（3月-7月）</button>
+            </div>
             <div class="form-group">
                 <label>开始日期</label>
                 <input type="date" id="semesterStartDate">
             </div>
             <div class="form-group">
-                <label>结束日期</label>
-                <input type="date" id="semesterEndDate">
+                <label>结束日期 <small style="color: #999;">（可选）</small></label>
+                <input type="date" id="semesterEndDate" placeholder="可选，不确定可不填">
             </div>
             <div class="modal-footer">
-                <button type="submit" class="btn btn-primary">创建并激活</button>
+                <button type="submit" class="btn btn-primary">创建学期</button>
                 <button type="button" class="btn" onclick="closeModal('createSemesterModal')">取消</button>
             </div>
         </form>
@@ -89,7 +93,7 @@ include __DIR__ . '/../includes/header.php';
         </div>
         <div class="form-group">
             <p id="archiveConfirmText" style="margin: 10px 0;"></p>
-            <p style="color: #e74c3c; font-size: 14px;">注意：归档后该学期的操行分记录将不可修改或撤销，但可以查看归档数据。</p>
+            <p style="color: #e74c3c; font-size: 14px;">注意：归档前需确保学期已设置开始日期，否则无法归档。归档后该学期的操行分记录将不可修改或撤销，但可以查看归档数据。</p>
         </div>
         <div class="modal-footer">
             <button type="button" class="btn btn-primary" onclick="confirmArchive()">确认归档</button>
@@ -108,11 +112,23 @@ include __DIR__ . '/../includes/header.php';
         <div class="table-wrapper">
             <table class="table">
                 <thead>
+                    <tr>
+                        <th colspan="2" style="text-align:center; border-bottom: none;">基本信息</th>
+                        <th rowspan="2" style="vertical-align: middle;">姓名</th>
+                        <th rowspan="2" style="vertical-align: middle;">操行分</th>
+                        <th colspan="4" style="text-align:center; border-bottom: none;">考勤统计</th>
+                        <th colspan="3" style="text-align:center; border-bottom: none;">作业统计</th>
+                    </tr>
                     <tr>
                         <th>排名</th>
                         <th>学号</th>
-                        <th>姓名</th>
-                        <th>最终操行分</th>
+                        <th>出勤</th>
+                        <th>缺勤</th>
+                        <th>迟到</th>
+                        <th>请假</th>
+                        <th>已交</th>
+                        <th>未交</th>
+                        <th>迟交</th>
                     </tr>
                 </thead>
                 <tbody id="archiveDataList"></tbody>
@@ -130,6 +146,28 @@ var archiveSemesterId = null;
 var archivePage = 1;
 var archiveTotalPages = 1;
 
+function fillSemesterDates(type) {
+    var now = new Date();
+    var currentYear = now.getFullYear();
+    var currentMonth = now.getMonth() + 1;
+    var startDateInput = document.getElementById('semesterStartDate');
+    var endDateInput = document.getElementById('semesterEndDate');
+
+    if (type === 'upper') {
+        var year = currentMonth >= 6 ? currentYear : currentYear - 1;
+        var endYear = year + 1;
+        var febDay = 28;
+        if ((endYear % 4 === 0 && endYear % 100 !== 0) || endYear % 400 === 0) {
+            febDay = 29;
+        }
+        startDateInput.value = year + '-09-01';
+        endDateInput.value = endYear + '-02-' + febDay;
+    } else if (type === 'lower') {
+        startDateInput.value = currentYear + '-03-01';
+        endDateInput.value = currentYear + '-07-15';
+    }
+}
+
 async function loadSemesters() {
     const res = await apiGet('/api/semester/list');
     if (res && res.success) {
@@ -200,7 +238,7 @@ async function submitCreateSemester() {
     });
 
     if (res && res.success) {
-        showToast('学期创建成功并已激活');
+        showToast(res.message || '学期创建成功');
         closeModal('createSemesterModal');
         loadSemesters();
     } else {
@@ -262,10 +300,17 @@ async function viewArchiveData(semesterId, semesterName, page) {
                 <td>${escapeHtml(a.student_no)}</td>
                 <td>${escapeHtml(a.student_name)}</td>
                 <td>${a.final_points}</td>
+                <td>${a.attendance_present || 0}</td>
+                <td>${a.attendance_absent || 0}</td>
+                <td>${a.attendance_late || 0}</td>
+                <td>${a.attendance_leave || 0}</td>
+                <td>${a.homework_submitted || 0}</td>
+                <td>${a.homework_not_submitted || 0}</td>
+                <td>${a.homework_late || 0}</td>
             </tr>`;
         });
         if (archives.length === 0) {
-            html = '<tr><td colspan="4" style="text-align:center;">暂无归档数据</td></tr>';
+            html = '<tr><td colspan="11" style="text-align:center;">暂无归档数据</td></tr>';
         }
         document.getElementById('archiveDataList').innerHTML = html;
 

frontend/student/semester_history.php

@@ -166,6 +166,23 @@ async function loadSemesterRecords() {
                                 <div class="semester-stat-label">班级总人数</div>
                             </div>
                         </div>
+                        <div style="margin-top: 12px; padding-top: 12px; border-top: 1px solid #eee;">
+                            <div style="font-size: 12px; color: #999; margin-bottom: 8px;">考勤统计</div>
+                            <div style="display: flex; gap: 8px; flex-wrap: wrap;">
+                                <span style="background: #e8f5e9; color: #388e3c; padding: 2px 8px; border-radius: 10px; font-size: 12px;">出勤 ${record.attendance_present || 0}</span>
+                                <span style="background: #ffebee; color: #c62828; padding: 2px 8px; border-radius: 10px; font-size: 12px;">缺勤 ${record.attendance_absent || 0}</span>
+                                <span style="background: #fff3e0; color: #e65100; padding: 2px 8px; border-radius: 10px; font-size: 12px;">迟到 ${record.attendance_late || 0}</span>
+                                <span style="background: #e3f2fd; color: #1565c0; padding: 2px 8px; border-radius: 10px; font-size: 12px;">请假 ${record.attendance_leave || 0}</span>
+                            </div>
+                        </div>
+                        <div style="margin-top: 8px;">
+                            <div style="font-size: 12px; color: #999; margin-bottom: 8px;">作业统计</div>
+                            <div style="display: flex; gap: 8px; flex-wrap: wrap;">
+                                <span style="background: #e8f5e9; color: #388e3c; padding: 2px 8px; border-radius: 10px; font-size: 12px;">已交 ${record.homework_submitted || 0}</span>
+                                <span style="background: #ffebee; color: #c62828; padding: 2px 8px; border-radius: 10px; font-size: 12px;">未交 ${record.homework_not_submitted || 0}</span>
+                                <span style="background: #fff3e0; color: #e65100; padding: 2px 8px; border-radius: 10px; font-size: 12px;">迟交 ${record.homework_late || 0}</span>
+                            </div>
+                        </div>
                     </div>
                 `;
             });

sql/init.sql

@@ -187,6 +187,13 @@ CREATE TABLE IF NOT EXISTS `semester_archives` (
     `final_points` INT NOT NULL COMMENT '学期最终操行分',
     `rank_position` INT DEFAULT NULL COMMENT '排名',
     `total_students` INT DEFAULT NULL COMMENT '班级总人数',
+    `attendance_present` INT DEFAULT 0 COMMENT '出勤次数',
+    `attendance_absent` INT DEFAULT 0 COMMENT '缺勤次数',
+    `attendance_late` INT DEFAULT 0 COMMENT '迟到次数',
+    `attendance_leave` INT DEFAULT 0 COMMENT '请假次数',
+    `homework_submitted` INT DEFAULT 0 COMMENT '已交作业数',
+    `homework_not_submitted` INT DEFAULT 0 COMMENT '未交作业数',
+    `homework_late` INT DEFAULT 0 COMMENT '迟交作业数',
     `archived_at` TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
     FOREIGN KEY (`semester_id`) REFERENCES `semesters`(`semester_id`),
     FOREIGN KEY (`student_id`) REFERENCES `students`(`student_id`)
@@ -260,6 +267,111 @@ PREPARE stmt FROM @sql;
 EXECUTE stmt;
 DEALLOCATE PREPARE stmt;
 
+-- 迁移：semester_archives 表新增 attendance_present 字段
+SET @column_exists = (
+    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
+    WHERE TABLE_SCHEMA = 'classmanagerdb'
+    AND TABLE_NAME = 'semester_archives'
+    AND COLUMN_NAME = 'attendance_present'
+);
+SET @sql = IF(@column_exists = 0,
+    'ALTER TABLE `semester_archives` ADD COLUMN `attendance_present` INT DEFAULT 0 COMMENT ''出勤次数'' AFTER `total_students`',
+    'SELECT ''semester_archives.attendance_present already exists'' AS message'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+-- 迁移：semester_archives 表新增 attendance_absent 字段
+SET @column_exists = (
+    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
+    WHERE TABLE_SCHEMA = 'classmanagerdb'
+    AND TABLE_NAME = 'semester_archives'
+    AND COLUMN_NAME = 'attendance_absent'
+);
+SET @sql = IF(@column_exists = 0,
+    'ALTER TABLE `semester_archives` ADD COLUMN `attendance_absent` INT DEFAULT 0 COMMENT ''缺勤次数'' AFTER `attendance_present`',
+    'SELECT ''semester_archives.attendance_absent already exists'' AS message'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+-- 迁移：semester_archives 表新增 attendance_late 字段
+SET @column_exists = (
+    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
+    WHERE TABLE_SCHEMA = 'classmanagerdb'
+    AND TABLE_NAME = 'semester_archives'
+    AND COLUMN_NAME = 'attendance_late'
+);
+SET @sql = IF(@column_exists = 0,
+    'ALTER TABLE `semester_archives` ADD COLUMN `attendance_late` INT DEFAULT 0 COMMENT ''迟到次数'' AFTER `attendance_absent`',
+    'SELECT ''semester_archives.attendance_late already exists'' AS message'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+-- 迁移：semester_archives 表新增 attendance_leave 字段
+SET @column_exists = (
+    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
+    WHERE TABLE_SCHEMA = 'classmanagerdb'
+    AND TABLE_NAME = 'semester_archives'
+    AND COLUMN_NAME = 'attendance_leave'
+);
+SET @sql = IF(@column_exists = 0,
+    'ALTER TABLE `semester_archives` ADD COLUMN `attendance_leave` INT DEFAULT 0 COMMENT ''请假次数'' AFTER `attendance_late`',
+    'SELECT ''semester_archives.attendance_leave already exists'' AS message'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+-- 迁移：semester_archives 表新增 homework_submitted 字段
+SET @column_exists = (
+    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
+    WHERE TABLE_SCHEMA = 'classmanagerdb'
+    AND TABLE_NAME = 'semester_archives'
+    AND COLUMN_NAME = 'homework_submitted'
+);
+SET @sql = IF(@column_exists = 0,
+    'ALTER TABLE `semester_archives` ADD COLUMN `homework_submitted` INT DEFAULT 0 COMMENT ''已交作业数'' AFTER `attendance_leave`',
+    'SELECT ''semester_archives.homework_submitted already exists'' AS message'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+-- 迁移：semester_archives 表新增 homework_not_submitted 字段
+SET @column_exists = (
+    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
+    WHERE TABLE_SCHEMA = 'classmanagerdb'
+    AND TABLE_NAME = 'semester_archives'
+    AND COLUMN_NAME = 'homework_not_submitted'
+);
+SET @sql = IF(@column_exists = 0,
+    'ALTER TABLE `semester_archives` ADD COLUMN `homework_not_submitted` INT DEFAULT 0 COMMENT ''未交作业数'' AFTER `homework_submitted`',
+    'SELECT ''semester_archives.homework_not_submitted already exists'' AS message'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+-- 迁移：semester_archives 表新增 homework_late 字段
+SET @column_exists = (
+    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
+    WHERE TABLE_SCHEMA = 'classmanagerdb'
+    AND TABLE_NAME = 'semester_archives'
+    AND COLUMN_NAME = 'homework_late'
+);
+SET @sql = IF(@column_exists = 0,
+    'ALTER TABLE `semester_archives` ADD COLUMN `homework_late` INT DEFAULT 0 COMMENT ''迟交作业数'' AFTER `homework_not_submitted`',
+    'SELECT ''semester_archives.homework_late already exists'' AS message'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
 -- 插入初始科目（仅语数英，如不存在）
 INSERT IGNORE INTO `subjects` (`subject_name`, `subject_code`, `sort_order`) VALUES
 ('语文', 'CHI', 1),