dashboard_controller.rb

class DashboardController < ResourceController
  def get
    # show dashboard
  end
end

projects_controller.rb

class ProjectsController < CollectionController
  # /projects
  collection do
    def get
      # equivalent of index action
    end

    def post
      # equivalent of create action
    end
  end

  # /projects/:id
  member do
    def get
      # equivalent of show action
    end

    def put
      # equivalent of update action
    end

    def delete
      # equivalent of destroy action
    end
  end

  # /projects/new
  new_member do
    def get
      # equivalent of new action
    end
  end

  # /projects/:id/edit
  edit_member do
    def get
      # equivalent of edit action
    end
  end
end

routes.rb

# - 'resources' replaced by 'collection'
# - 'resource' maps one URL pattern to a controller,
#    the action picked corresponds to HTTP verb
#    (i.e. GET -> controller#get, POST -> controller#post, PUT -> controller#put, etc..)
Example::Application.routes.draw do

  resource :dashboard # routes request for /dashboard to dashboard_controller, action corresponds to HTTP verb

  collection :projects do
    collection :attachments # nested collection e.g. /projects/123/attachments/388
    resource :search, :to => :search_projects # nested resource /projects/search?q=foo
  end

  resource 'tags/:tag', :to => :tag

end

search_projects_controller.rb

class SearchProjectsController < ResourceController
  def get
    # search using params in url
  end

  def post
    # search using params in post request body (e.g. for queries too big for a URL)
  end
end