一，函数
from flask import jsonifydef success_response(data=None):"""结果响应：带数据和状态信息"""return jsonify({'status': "success",'code': 200,'msg': "",'data': data})def failed_response(code=500, msg="", data=None):"""结果响应：带数据和状态信息"""return jsonify({'status': "failed",'code': code,'msg': msg,'data': data})二，model
from app import db# 设计数据库模型
class User(db.Model):# 指定表名称__tablename__ = 'user'id = db.Column(db.Integer, primary_key=True)username = db.Column(db.String(64), nullable=False)nickname = db.Column(db.String(256), nullable=False)age = db.Column(db.Integer, default=0)city = db.Column(db.String(256), nullable=False)def to_json(self):"""资源和JSON的序列化转换"""json_obj = {'id': self.id,'username': self.username,'nickname': self.nickname,'age': self.age,'city': self.city,}return json_obj三，调用
对象需要转为字典再输出成json
@user.route("/list/")
def user_list():# 得到数据库中的数据users = User.query.all()for index, user in enumerate(users):if user.id == 2:users[index].city = "沈阳市"return success_response([user.to_json() for user in users])四，测试效果：
