How to route multiple levels of nested resources in Rails 3?

I know I can specify nested resources on routes.rb 开发者_Python百科in Rails 3 this way:

  resources :users do
    resources :posts 
  end

However, I would like to add comments to posts. What should I write in my routes.rb file? Is this the correct way? Can I keep nesting them?

  resources :users do
    resources :posts do
     resources :comments
    end
  end

You can keep nesting the way you have shown and things will work fine. There are quite a few sources that will tell you not to go crazy nesting routes though. Take a look at Rails Best Practices for example (I think the article was created for rails 2 but the principals still apply). Jamis Buck also blogged about this a while ago.

Yes, you can keep nesting and nesting and nesting and so forth.

Yes. What you wrote is the correct way.

I've been interested in this same problem and I think you're suppose to do:

resources :users do
  resources :posts
end

resources :posts do
  resources :comments
end

Check out the API on Resources.