ruby-on-rails - 干掉几个模型的重复路线

Question

我有一些模型，如新闻和下载，其中有_许多评论:as => :commentable。评论belongs_to :commentable 并且是:polymorphic。和评论一样，有订阅。所以我的路线是这样的:

resources :news do
  resources :comments do
    post :like, :on => :member
    delete :like, :on => :member
  end
  resources :subscriptions
  ...
end

resources :downloads do
  resources :comments do
    post :like, :on => :member
    delete :like, :on => :member
  end
  resources :subscriptions
  ...
end

...

有没有办法把它弄干？我试着定义

def comment_resources
  resources :comments do
    # ...
  end
  resources :subscriptions
end

然后在routes.rb的顶部，然后调用comment_resources，但对我来说似乎很脏，因为它没有正确命名空间/在类中。

Answer 1

1)如果你在新闻和下载中有完全相同的内部路线，你可以

%w(news downloads).each do |res|
  resources res do
    resources :comments do
      post :like, :on => :member
      delete :like, :on => :member
    end
    resources :subscriptions
    ...
  end
end

2) 否则你可以看 https://github.com/rails/routing_concerns (将作为 rails-4 的一部分包含在内):

concern :commentable do
  resources :comments do
    post :like, :on => :member
    delete :like, :on => :member
  end
  resources :subscriptions
end

resources :news, concerns: :commentable do
  ...
end
resources :downloads, concerns: :commentable do
  ...
end