v2.4更新

backend/models/subject.py

@@ -71,10 +71,8 @@ class SubjectModel:
     
     @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
+        """检查科目是否有关联数据"""
+        return False
     
     @staticmethod
     async def delete(subject_id: int) -> bool: