关于flask下写myql的疑问

Question

先上代码

#-*- coding: UTF-8 -*-

from flask import Flask

from flask_script import Manager

from flask_sqlalchemy import SQLAlchemy

from sqlalchemy import Column,Integer,String,Sequence,Date,DateTime

app = Flask(__name__)

app.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://root@localhost:3306/py_demo'

app.config['SQLALCHEMY_COMMIT_ON_TEARDOWN'] = True

db = SQLAlchemy(app)

manager = Manager(app)

class User(db.model):

__tablename__ = 'users'

user_id   = db.Column(db.Integer, primary_key = True)

user_name = db.Column(db.String(80), unique =  True)

def __init__(self,user_name):

self.user_name = user_name

def __repr__(self):

return '<User %r>' % self.user_name

if __name__ == '__main__':  

    manager.run() 

这代码，我从网上和书上多做了参考，在我的虚拟环境里写入 python tmp_sql.py shell

会出现这个bug,明明照着书写的也有错，哈哈 也是醉了，然后把我db.model删除了吧

能顺利进入

但之后还是有bug.

我就想，既然网上和书上都要求有个db.model。可是却有bug。求支教~~~

Answer 1

恭喜你找到

Answer 2

我知道了，是db.Model