v2.0.1更新

backend/models/homework.py

@@ -42,7 +42,6 @@ class HomeworkModel:
         """
         return await execute_query(sql, tuple(subject_ids))
     
-    @staticmethod
     @staticmethod
     async def get_student_homework(student_id: int) -> List[Dict[str, Any]]:
         sql = """

backend/models/semester.py

@@ -126,6 +126,18 @@ class SemesterModel:
         """
         return await execute_query(sql, (semester_id, start_date, end_date))
     
+    @staticmethod
+    async def count_records_by_semester(semester_id: int) -> Dict[str, int]:
+        """统计学期关联的记录数"""
+        conduct_sql = "SELECT COUNT(*) as cnt FROM conduct_records WHERE semester_id = %s"
+        attendance_sql = "SELECT COUNT(*) as cnt FROM attendance_records WHERE semester_id = %s"
+        conduct_result = await execute_one(conduct_sql, (semester_id,))
+        attendance_result = await execute_one(attendance_sql, (semester_id,))
+        return {
+            "conduct_count": conduct_result['cnt'] if conduct_result else 0,
+            "attendance_count": attendance_result['cnt'] if attendance_result else 0
+        }
+    
     @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"""

backend/models/subject.py

@@ -69,6 +69,13 @@ class SubjectModel:
         result = await execute_update(sql, tuple(params))
         return result > 0
     
+    @staticmethod
+    async def has_related_data(subject_id: int) -> bool:
+        """检查科目是否有关联数据（assignments表）"""
+        sql = "SELECT COUNT(*) as cnt FROM assignments WHERE subject_id = %s"
+        result = await execute_one(sql, (subject_id,))
+        return result['cnt'] > 0
+    
     @staticmethod
     async def delete(subject_id: int) -> bool:
         sql = "UPDATE subjects SET is_active = 0 WHERE subject_id = %s"