Rails 3: respond_with errors on undefined URL helper

I have an `Artwork` model that is manipulated only by API endpoints right now. (You'll see why this is important shortly). Those API endpoints are declared like so in my `routes.rb` file: ``` namespace :api do namespace :v1, :defaults => { :format => :json } do resources :artworks, :only => [:create, :destroy, :index, :show, :update] ``` This results in the following routes: ``` api_v1_artworks GET /api/v1/artworks(.:format) api/v1/artworks#index {:format=>:json} POST /api/v1/artworks(.:format) api/v1/artworks#create {:format=>:json} api_v1_artwork GET /api/v1/artworks/:id(.:format) api/v1/artworks#show {:format=>:json} PUT /api/v1/artworks/:id(.:format) api/v1/artworks#update {:format=>:json} DELETE /api/v1/artworks/:id(.:format) api/v1/artworks#destroy {:format=>:json} ``` Relevant code: ``` class Api::V1::ArtworksController < Api::V1::ApiController def create artwork = Artwork.create(artwork_params) respond_with artwork end ``` The Problem When `#create` succeeds, `respond_with` chokes: ``` `undefined method `artwork_url' for #<Api::V1::ArtworksController:0x007fea1b4c67f8>` ``` It's expecting the helper for the HTTP Location to be `artwork_url`. How do I tell it to use `api_v1_artwork_url` instead? Can I alias the URL helper?