Rails nested routing match

Question

I am new to rails and have a tricky routing question. I have a resource with a nested collection that maps to the controller of the type for the nested collection. However the name of the collection does not map to the controller which I want to route the request to.

Basically the User model has many followers and followings. These 2 collections map to the Follow model which has a follows controller with standard crud methods.

user.rb:

class User < ActiveRecord::Base
  has_many :followers, class_name: Follow, foreign_key: :user_id, dependent: :destroy
  has_many :followings, class_name: Follow, foreign_key: :follower_id, dependent: :destroy
end

follow.rb:

class Follow < ActiveRecord::Base

  belongs_to :user, counter_cache: :followers_count
  belongs_to :follower, class_name: 'User', counter_cache: :followings_count

  attr_accessible :user, :user_id, :follower, :follower_id

  validates_presence_of :user_id, :follower_id
  validates_uniqueness_of :user_id, scope: :follower_id

end

follows_controller.rb:

def index
  respond_with @follows
end

routes.rb:

resources :users do
    resources :followers, :controller => "follows"
    resources :following, :controller => "follows"
end

rake routes:

api_v1_user_followers GET    /api/v1/users/:user_id/followers(.:format)              api/v1/follows#index
                                POST   /api/v1/users/:user_id/followers(.:format)              api/v1/follows#create
       new_api_v1_user_follower GET    /api/v1/users/:user_id/followers/new(.:format)          api/v1/follows#new
      edit_api_v1_user_follower GET    /api/v1/users/:user_id/followers/:id/edit(.:format)     api/v1/follows#edit
           api_v1_user_follower GET    /api/v1/users/:user_id/followers/:id(.:format)          api/v1/follows#show
                                PUT    /api/v1/users/:user_id/followers/:id(.:format)          api/v1/follows#update
                                DELETE /api/v1/users/:user_id/followers/:id(.:format)          api/v1/follows#destroy
    api_v1_user_following_index GET    /api/v1/users/:user_id/following(.:format)              api/v1/follows#index
                                POST   /api/v1/users/:user_id/following(.:format)              api/v1/follows#create
      new_api_v1_user_following GET    /api/v1/users/:user_id/following/new(.:format)          api/v1/follows#new
     edit_api_v1_user_following GET    /api/v1/users/:user_id/following/:id/edit(.:format)     api/v1/follows#edit
          api_v1_user_following GET    /api/v1/users/:user_id/following/:id(.:format)          api/v1/follows#show
                                PUT    /api/v1/users/:user_id/following/:id(.:format)          api/v1/follows#update
                                DELETE /api/v1/users/:user_id/following/:id(.:format)          api/v1/follows#destroy

I tried adding the :controller => 'follows' and that does correctly map both nested collection routes to the follows_controller. However I get this error:

Started GET "/api/v1/users/2/following?auth_token=qhcT6CSHi3S7KrEnJtq6" for 10.0.1.72 at 2013-04-22 09:52:43 -0600

ActionController::RoutingError (uninitialized constant Api::V1::FollowingController):

Any ideas on how to correctly solve this problem would be greatly appreciated.

Thanks,