Question

Pretty simple question, but I can’t seem to figure out how to do this, even after scouring the Rails Routing guide.

Assume Topics has nested resource Posts.

The Posts for a Topic are all listed in Posts#index (/topics/:topic_id/messages). Topics#show does not serve any purpose. I would like Posts#index to be retrieved when the request is for /topics/:topic_id, without having to stick a redirect in the Topics controller.

Thank you!

UPDATE

I was able to get the desired result with this:

routes.rb

match 'forums/:forum_id' => 'topics#index', :as => 'forum_topics', :via => :get
match 'topics/:topic_id' => 'messages#index', :as => 'topic_messages', :via => :get

resources :forums, :shallow => true, :except => :show do
  resources :topics, :shallow => true, :except => :show do
    resources :messages
  end
end

However, I’m not sure if this is the best method.

UPDATE 2
My method above breaks the other CRUD methods (like #create). Still looking for a solution to keep /messages out of the url.

Answer 1

add this route

get "/topics/:topic_id" => redirect("/topics/%{topic_id}/messages")

UPD

without redirecting:

get "/topics/:id" => "topic::Messages#index"

Or, if you’re using shallow:

get "/topics/:id" => "messages#index"

resources :forums, :shallow => true, :except => :show do
  resources :topics, :shallow => true, :except => :show do
    resources :messages
  end
end