ruby-on-rails 3路由的范围和命名空间之间的差异

Question

我无法理解ruby-on-rails 3路由中命名空间和范围之间的区别.

有人可以解释一下吗？

namespace "admin" do
  resources :posts, :comments
end

scope :module => "admin" do
  resources :posts, :comments
end

Answer 1

不同之处在于生成的路径.

路径是admin_posts_path和admin_comments_path命名空间的路径,而它们只是posts_path和comments_path范围.

通过将:name_prefix选项传递给作用域,可以获得与命名空间相同的结果.

Answer 2

示例总是帮助我,所以这是一个例子:

namespace :blog do
  resources :contexts
end

会给我们以下路线:

    blog_contexts GET    /blog/contexts(.:format)          {:action=>"index", :controller=>"blog/contexts"}
                  POST   /blog/contexts(.:format)          {:action=>"create", :controller=>"blog/contexts"}
 new_blog_context GET    /blog/contexts/new(.:format)      {:action=>"new", :controller=>"blog/contexts"}
edit_blog_context GET    /blog/contexts/:id/edit(.:format) {:action=>"edit", :controller=>"blog/contexts"}
     blog_context GET    /blog/contexts/:id(.:format)      {:action=>"show", :controller=>"blog/contexts"}
                  PUT    /blog/contexts/:id(.:format)      {:action=>"update", :controller=>"blog/contexts"}
                  DELETE /blog/contexts/:id(.:format)      {:action=>"destroy", :controller=>"blog/contexts"}

使用范围......

scope :module => 'blog' do
  resources :contexts
end

会给我们:

     contexts GET    /contexts(.:format)           {:action=>"index", :controller=>"blog/contexts"}
              POST   /contexts(.:format)           {:action=>"create", :controller=>"blog/contexts"}
  new_context GET    /contexts/new(.:format)       {:action=>"new", :controller=>"blog/contexts"}
 edit_context GET    /contexts/:id/edit(.:format)  {:action=>"edit", :controller=>"blog/contexts"}
      context GET    /contexts/:id(.:format)       {:action=>"show", :controller=>"blog/contexts"}
              PUT    /contexts/:id(.:format)       {:action=>"update", :controller=>"blog/contexts"}
              DELETE /contexts/:id(.:format)       {:action=>"destroy", :controller=>"blog/contexts"}

以下是关于这个主题的一些很好的解读:http://edgeguides.rubyonrails.org/routing.html#controller-namespaces-and-routing

Answer 3

从导轨指南

"该命名空间范围会自动添加:as,以及:module和:path前缀."

所以

namespace "admin" do
  resources :contexts
end

是相同的

scope "/admin", as: "admin", module: "admin" do
  resources :contexts
end