删除了冗余查询接口，查询接口新增查询枚举性别功能

dao/student.py

@@ -1,6 +1,9 @@
 from models.student import Student
 from sqlalchemy.orm import Session
 
+from schemas.student import Gender
+
+
 #新建学生
 def create_students(d: dict, db: Session):
     stu = Student(**d)
@@ -62,6 +65,7 @@ def get_students(
     class_id: int | None = None,
     page: int = 1,
     page_size: int = 10,
+    gender: Gender = None,
 ):
     # 第一步：只查询没有被删除的学生
     query = db.query(Student).filter(Student.is_deleted == 0)
@@ -71,6 +75,10 @@ def get_students(
         # 学号使用精确查询
         query = query.filter(Student.student_no == student_no)
 
+    if gender:
+        #查询枚举性别
+        query = query.filter(Student.gender == gender)
+
     if student_name:
         # 姓名使用模糊查询，例如“张”可以查到“张三”
         query = query.filter(Student.student_name.like(f"%{student_name}%"))