Rails3 是否提供任何钩子来插入可插拔、可重复使用的组件？
Rails 3 为鼓励代码重用做了哪些努力？是否有类似于框架中内置的 merb 切片/引擎的东西，允许我放入可配置组件（例如“博客”引擎）？如果是这样，什么是最佳实践？
What efforts have been made in rails 3 to encourage code re-use? Is there anything akin to merb slices / engines built into the framework that would allow me to drop in a configurable component such as a 'blog' engine? If so, what is considered best practice?
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关于俄罗斯套娃和可安装应用程序
Rails 3 中最热门的新功能之一是能够将 Rails 应用程序嵌入另一个 Rails 应用程序。这允许开发从用户身份验证到功能齐全的论坛的组件。
请参阅此处了解更多信息
您还可以使用 Rack with Rails。
On Russian dolls and mountable apps
One of the hottest new features in Rails 3 is the ability to embed a Rails application in another Rails application. This allows the development of components that range from user authentication to a fully featured forum.
See here for more
You can also use Rack with Rails.