python flask 连接mysql,

#要pip intall flask-sqlalchemy, pymysql, 如果失败，参照我上篇，解决问题，我用了好几个小时搞定这个问题的

from flask import Flask
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)

app.config['SQLALCHEMY_DATABASE_URI']='mysql+pymysql://root:123456@localhost:3306/flask_sql_demo'

app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True

db = SQLAlchemy(app)

@app.route('/')
def hello_world():
    return 'Hello World!'

class Role(db.Model):
    __tablename__ = 'roles'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(16), unique=True)

class User(db.Model):
    __tablename__ = 'users'
    id = db.Column(db.Integer, primary_key=True)
    name = db.Column(db.String(16), unique=True)
    role_id = db.Column(db.Integer, db.ForeignKey('roles.id'))

if __name__ == '__main__':
    db.drop_all()
    db.create_all()
    app.run()

 

来源：CSDN

作者：julicliy

链接：https://blog.csdn.net/julicliy/article/details/104180614