Some ideas on a small framework. Yet another web framework.

gistfile1.rb

class Lists < App
  all { List.all } # :get /lists
  one { List.find(params[:id]) } # :get /lists/:id
  instance { List.new(params[:list]) }

  to_update { list.update_attributes(params[:list]) }
  to_destroy { list.destroy }

  # If you want to set an action for this resource only.
  get :search do
    List.search(params[:query])
  end
end

class Tasks < App
  parent List # this invokes List#find and sets an ivar before finding tasks

  all { list.tasks.all } # :get /lists/:id/tasks
  one { list.tasks.find(params[:task_id]) } # :get /lists/:id/tasks/:id
  instance { list.tasks.new(params[:task]) }

  to_update { task.update_attributes(params[:task]) }
  to_destroy { task.destroy }
end

class Search
  all { SearchService.search(params[:resource], params[:query]) } # :get /search
end