mrz

PythonProject/dao/student_dao.py

@@ -1,8 +1,10 @@
 from fastapi import HTTPException,Depends
 from util.database import get_db
-from model.student_model import Student_Model
+from model.all_model import Student_Model
 from typing import List, Optional, Dict, Any
+from sqlalchemy import func
 
+# 实现根据年龄查询学生信息的功能
 def select_age(min_age,max_age,session=Depends(get_db)):
     try:
         if min_age is None and max_age is None:
@@ -18,6 +20,16 @@ def select_age(min_age,max_age,session=Depends(get_db)):
     except Exception:
         raise HTTPException(status_code=500,detail="查询异常")
 
+# 实现统计每个班级的学员总数以及男女生的总数的功能
+def select_all(session=Depends(get_db)):
+    print('1234')
+    try:
+        l1 = session.query(Student_Model.class_id,func.count(1)).group_by(Student_Model.class_id,Student_Model.gender).all()
+        print(l1)
+        return l1
+    except Exception:
+        raise HTTPException(status_code=500,detail="查询异常")
+
 def add_student_dao(o,db=Depends(get_db)):
     try:
         o1 = Student_Model( **o)