How to divide nested routes in Roda

Question

I write an application using Roda. I have a nested router like this:

   route 'chats' do |r|
      env['warden'].authenticate!
      r.is do
        @current_user = env['warden'].user

        r.get do
          # code is here
        end

        r.post do
          # code is here
        end
      end

      r.on :String do |chat_id|
        r.is 'messages' do
          # code is here

          r.get do
            # code is here
          end

          r.post do
            # code is here
          end
        end
      end
    end

I want to divide one big code-block into two routes like this:

route 'chats' do |r|
  # code is here
end
route 'chats/:chat_id/messages' do |r, chat_id|
  # code is here
end

Please, help. How to do it right?

Answer 1

You need to enable 2 plugins:

• multi_route - to allow splitting routes between separate files,
• shared_vars - to pass variables down the routes.

Then, on the highest level declare routes as follows:

  # routes/root.rb
  class YourApp::Web
    route do |r|
      r.on('chats') do
        r.is do
          r.route 'chats'
        end

        r.is(String, 'messages') do |chat_id|
          shared[:chat_id] = chat_id
          r.route 'chats_messages'
        end
      end
    end
  end

After that you can put chats and chats_messages into separate files:

  # routes/chats.rb
  class YourApp::Web
    route ('chats') do |r|
      r.get do
        # ....
      end

      r.post do
        # ....
      end
    end
  end

  # routes/chats_messages.rb
  class YourApp::Web
    route ('chats_messages') do |r|
      chat_id = shared[:chat_id]
      r.get do  
        # ....
      end

      r.post do  
        # ....
      end
    end
  end

Maybe there is also other solution. I've shared what worked for me. Hope it helps!