Flask中使用Flask-Migrate扩展迁移数据库

(venv) $ pip install flask-migrate

pip install flask-script

#!/usr/bin/env python

from flask_script import Manager
from flask_migrate import Migrate,MigrateCommand
#主文件中导入app初始化manage
from zhihu import app
#db = SQLAlchemy()
from exts import db
#导入需要迁移的数据库模型
from models import User,Questions,Answer

#让python支持命令行工作
manager = Manager(app)

#使用migrate绑定app和db
migrate = Migrate(app,db)

#添加迁移脚本的命令到manager中
manager.add_command('db',MigrateCommand)

if __name__ == '__main__':
    manager.run()

(venv) $ python manage.py db init

(venv) $ python manage.py db migrate

(venv) $ python hello.py db upgrade