How to consume a nested singular resource?

Hi,

We have a RESTful server application which exposes the following routes using the following rules, but when trying to consume those resources from a client application the routes are not generated correctly. And we are not sure how to get around that.

The routes.rb specifies the following resources:

ActionController::Routing::Routes.draw do |map|   map.resources :users do |user|     user.resource :blog   end

  map.connect ':controller/:action/:id'   map.connect ':controller/:action/:id.:format' end

Generated routes (only a subset):

POST /users/:user_id/blog {:controller=>"blogs", :action=>"create"} POST /users/:user_id/blog.:format {:controller=>"blogs", :action=>"create"} new_user_blog GET /users/:user_id/blog/new {:controller=>"blogs", :action=>"new"} formatted_new_user_blog GET /users/:user_id/blog/new.:format {:controller=>"blogs", :action=>"new"} edit_user_blog GET /users/:user_id/blog/edit {:controller=>"blogs", :action=>"edit"} formatted_edit_user_blog GET /users/:user_id/blog/edit.:format {:controller=>"blogs", :action=>"edit"} user_blog GET /users/:user_id/blog {:controller=>"blogs", :action=>"show"} formatted_user_blog GET /users/:user_id/blog.:format {:controller=>"blogs", :action=>"show"} PUT /users/:user_id/blog {:controller=>"blogs", :action=>"update"} PUT /users/:user_id/blog.:format {:controller=>"blogs", :action=>"update"} DELETE /users/:user_id/blog {:controller=>"blogs", :action=>"destroy"} DELETE /users/:user_id/blog.:format {:controller=>"blogs", :action=>"destroy"}

The routes are exactly as we would like them. i.e. per user there is only one blog.

The problem starts when trying to consume these resources using active resource from a client application (ie another rails app to consume the REST api resources). Here is a description of the models:

class User < ActiveResource::Base   self.site = "http://localhost:3000/&quot; end

class Blog < ActiveResource::Base   self.site = "http://localhost:3001/users/:user_id/&quot; end

CRUD operations for the User model work fine. No problem there. But on inspection of the collection and element paths for the Blog model the following urls are generated:

Blog.collection_path(:user_id => 1) => "/users/1/blogs.xml"

Blog.element_path(1, :user_id => 1) => "/users/1/blogs/1.xml"

On trying to create a blog for a specific user:

b = Blog.new(:params => {:user_id => 1})

b.save

ActiveResource::ResourceNotFound: Failed with 404 Not Found

the client application gets a 404 because the generated url is incorrect and the REST API application throws an ActionController::UnknownAction exception because the generated route is routed to the wrong controller and action, in this case:

/users/1/blogs.xml

gets routed to the users controller and tries to execute the 1 action. So, this cannot work, since the REST api cannot resolve these urls to routes since we have specified a singular resource i.e. "blog".

Can anyone help us with specifying how the consuming active resource models generate the correct urls for a singular nested resource? As we don't want to change the api specification as it is proper and concise.

Thanks in advance for your time.