Single Table Inheritance and RESTful Routes

I'm converting an old, controller/action/id style Rails application to a more RESTful way of doing things, and ran into a brief roadblock: one of my main tables uses single table inheritance to generate three subclasses of items. I never actually use the superclass "task", I only use the three subclasses "action item", "work order", and "problem report".

So, I ran into this little challenge: all three STI subclasses use the same controller, "tasks", because they all have essentially the same behavior and differ only in minor details. But, when I do a resources map:

map.resources :tasks

Then I get errors in much of my code when I say things like redirect_to @task, because if that task happens to be an ActionItem, it's trying to call action_item_path(@task), which doesn't exist.

I googled around a bit to no result. Striking out on my own, it turns out the answer is as simple as mapping each resource independently, and just overriding the controller in map.resources:

In config/routes.rb

map.resources :tasks
map.resources :action_items, :controller => 'tasks'
map.resources :work_orders, :controller => 'tasks'
map.resources :problem_reports, :controller => 'tasks'


Now, redirect_to @task works just fine regardless of which subclass @task happens to be.