url_for bad route...

gistfile1.rb

routes.rb

namespace :manage do
  resources :dashboard, :only => [] do 
    collection do
      get 'index'
    end
  end
end

match '/manage', :controller => 'manage/dashboard', :action => 'index'

in a controller

def redirect_to_something
  url_for({"controller"=>"manage/dashboard", "action"=>"index"}) # this is really url_for(request.params)
  # expected => test.host/manage
  # got => test.host
end