如何配置额外/不同的迁移文件夹

我和一位同事正在从事共享一些模型的不同项目。因此，我们通过 git 子模块共享模型。

此外，我们还希望能够共享迁移：

这样，我同事的迁移就会在文件夹中db/migrate/other_db我的项目。

如何配置 Rails 迁移以在这个额外文件夹中运行迁移？

在您的配置文件（对于所有环境为 config/application.rb 或仅对于特定环境为 config/environments/$(environment).rb）添加以下行：

config.paths['db/migrate'] += 'db/migrate/other_db'

如果您想更改默认的 'db/migrate' 路径（config.paths['db/migrate'] 是一个默认包含一个字符串 'db/migrate' 的数组），请执行以下操作：

config.paths['db/migrate'] = ['db/my_migrate']

这是默认的 config.paths，我们也可以更改：

"app" => ["app"],
"app/assets" => ["app/assets"],
"app/controllers" => ["app/controllers"],
"app/helpers" => ["app/helpers"],
"app/models" => ["app/models"],
"app/mailers" => ["app/mailers"],
"app/views" => ["app/views"],
"lib" => ["lib"],
"lib/assets" => ["lib/assets"],
"lib/tasks" => ["lib/tasks"],
"config" => ["config"],
"config/environments" => ["config/environments"],
"config/initializers" => ["config/initializers"],
"config/locales" => ["config/locales"],
"config/routes" => ["config/routes.rb"],
"db" => ["db"],
"db/migrate" => ["db/migrate"],
"db/seeds" => ["db/seeds.rb"],
"vendor" => ["vendor"],
"vendor/assets" => ["vendor/assets"],
"vendor/plugins" => ["vendor/plugins"],
"config/database" => ["config/database.yml"],
"config/environment" => ["config/environment.rb"],
"lib/templates" => ["lib/templates"],
"log" => ["log/development.log"],
"public" => ["public"],
"public/javascripts" => ["public/javascripts"],
"public/stylesheets" => ["public/stylesheets"],
"tmp" => ["tmp"],