Rails reverses each migration step in order, rolling back the changes for the largest migration first, eventually downgrading the database to version 0 as specified.

Rails按顺序逆转每个迁移步骤，首先回滚最近的迁移，最终将数据库回滚到版本0。

youdao

Rails reverses each migration step in order, rolling back the changes for the largest migration first, eventually downgrading the database to version 0 as specified.

Rails按顺序逆转每个迁移步骤，首先回滚最近的迁移，最终将数据库回滚到版本0。

youdao