优化了students_dao里add_student_dao的报错逻辑。

students/api/students_api.py

@@ -27,15 +27,15 @@ def get_students( stu:StudentsQuery = Depends()
 @s_api.post("/students"
     ,summary='新增学生资料'
     ,description=f'学生ID自动分配，学生姓名、学生手机号和班级是必填项，不能为空。\n '
-                 f'时间格式：YYYY-MM-DD'
+                 f'注意事项：\n'
+                 f'时间格式：YYYY-MM-DD\n'
+                 f'班级ID和顾问ID必须已经存在才可以绑定'
     ,response_model=StudentsResponse )
 def add_student( stu:StudentsResponse = Depends()
                 , db=Depends(get_db)
                  ):
     s_dict = stu.model_dump(exclude_unset=True)
     result = add_student_dao( s=s_dict , db=db )
-    if not result:
-        raise HTTPException(status_code=500, detail='手机号已有学生使用或必填项为空。')
     return result
 
 @s_api.put("/students"

students/dao/students_dao.py

@@ -62,9 +62,11 @@ def add_student_dao( s , db):
         phone = s.get("phone")
         s1_deleted = db.query( Students ).filter( Students.phone == phone ).first()
         if s1_deleted and s1_deleted.is_deleted == False:
-            return False
+            raise ValueError("该手机号已存在有效学生记录，请勿重复添加")
         if not phone:
-            return False
+            raise ValueError("手机号不能为空")
+        if not s.get("class_id") or not s.get("advisor_id"):
+            raise ValueError("班级ID和顾问ID必须已经存在才可以绑定")
         if s1_deleted and s1_deleted.is_deleted == True:
             s1_deleted.name = s.get("name")
             s1_deleted.age = s.get("age")
@@ -90,10 +92,14 @@ def add_student_dao( s , db):
             return s1_deleted
         s1 = Students( **s )
         db.add(s1)
+    except ValueError as e:
+        # 业务校验异常：回滚并返回错误信息
+        db.rollback()
+        return {"code": 400, "msg": str(e)}
     except Exception:
         # 这里可以加日志
         db.rollback()
-        return False
+        return {"code": 500, "msg": f"系统异常: {str(e)}"}
     else:
         db.commit()
         db.refresh(s1)