使用 Flask-Migrate 实现数据库迁移

1.首先安装Flask-Migrate

$pip install flask-migrate

2.配置 Flask-Migrate

from flask.migrate import Migrate, MigrateCommand

# ...

migrate = Migrate(app, db)

manager.add_command('db', MigrateCommand)

3.在维护数据库迁移之前,要使用 init 子命令创建迁移仓库:

$ python manage.py db init

4.migrate 子命令用来自动创建迁移脚本:

$ python manage.py db migrate -m "initial migration"

5.更新数据库

$ python manage.py db upgrade