Flask - 用代码创建数据库

from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from _datetime import datetime
app=Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = "mysql://root:@127.0.0.1:3306/XXXXXX数据库名XXXXXX?charset=utf8mb4"
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
app.config['SQLALCHEMY_ECHO'] = True
db = SQLAlchemy(app)
#数据库-Wechatdatabase表-用户
class Wechatdatabase(db.Model):
    __tablename__ = 'wechat_user001'
    id = db.Column(db.Integer,primary_key=True)
    openid = db.Column(db.VARCHAR(255))
    nickname = db.Column(db.VARCHAR(255))
    sex = db.Column(db.Integer)
    province = db.Column(db.Text)
    city = db.Column(db.Text)
    country = db.Column(db.Text)
    unionid = db.Column(db.VARCHAR(255))#微信uid
    points = db.Column(db.Integer)#现在拥有的点数
    success_points = db.Column(db.Integer)#成功充值点数
    success_times = db.Column(db.Integer)#成功充值次数
    success_total_fee = db.Column(db.Integer)#成功充值金额
    orders = db.relationship('Wechatdatabaseorder',backref='nickname2')#这个用户的订单集合
    def __repr__(self):
        return 'Wechatdatabase:OK'
#数据库-Wechatdatabaseorder表-订单
class Wechatdatabaseorder(db.Model):
    __tablename__ = 'wechat_user_orders001'
    id = db.Column(db.Integer,primary_key=True)#订单id
    openid = db.Column(db.VARCHAR(255))
    nickname = db.Column(db.VARCHAR(255))
    unionid = db.Column(db.VARCHAR(255))
    out_trade_no = db.Column(db.VARCHAR(255))#订单号
    order_name = db.Column(db.VARCHAR(255))#订单名
    state = db.Column(db.VARCHAR(255))#订单状态未付款，已付款
    creat_time = db.Column(db.DateTime, default=datetime.now)#创建时间
    time_end = db.Column(db.VARCHAR(14))
    update_time = db.Column(db.DateTime, default=datetime.now,onupdate=datetime.now)#更新时间
    total_fee = db.Column(db.Integer)#订单价格
    spbill_create_ip = db.Column(db.VARCHAR(64))
    Wechatdatabase_id = db.Column(db.Integer,db.ForeignKey('wechat_user001.id'))#这个系统的下单的人id
    def __repr__(self):
        return 'Wechatdatabaseorder:  ok'
#db.drop_all()  #谨慎开
db.create_all()    # 创建当前应用中声明的所有模型类对应的数据表，db.drop_all()是删除表
@app.route("/")
def index():
    return "hello"
if __name__ == '__main__':
    app.run(debug=True)