增加了方法的注释

dao/student.py

@@ -3,7 +3,7 @@ from core.database import get_db
 from models.student import *
 from sqlalchemy.orm import Session
 
-
+#新建学生
 def create_students(d: dict, db: Session):
     stu = Student(**d)
 
@@ -22,6 +22,7 @@ def create_students(d: dict, db: Session):
         print(f"插入学生失败: {e}")
         return None
 
+#查询学生是否已经被逻辑删除
 def get_student_by_id(student_id: int, db: Session):
     # 同时判断 is_deleted，已经逻辑删除的学生不会被查到
     return db.query(Student).filter(
@@ -29,6 +30,7 @@ def get_student_by_id(student_id: int, db: Session):
         Student.is_deleted == 0,
     ).first()
 
+#更新学生信息
 def update_student(student_id: int, data: dict, db: Session):
     # 第一步：先查询学生
     student = get_student_by_id(student_id, db)
@@ -54,6 +56,7 @@ def update_student(student_id: int, data: dict, db: Session):
         print("修改学生失败：", e)
         return False
 
+#允许条件输入的列表查询
 def get_students(
     db: Session,
     student_no: str | None = None,