| Class | ActionController::Routing::RouteSet::Mapper | 
| In: | lib/action_controller/routing/route_set.rb | 
| Parent: | Object | 
Create an unnamed route with the provided path and options. See ActionController::Routing for an introduction to routes.
Enables the use of resources in a module by setting the name_prefix, path_prefix, and namespace for the model. Example:
  map.namespace(:admin) do |admin|
    admin.resources :products,
      :has_many => [ :tags, :images, :variants ]
  end
This will create admin_products_url pointing to "admin/products", which will look for an Admin::ProductsController. It‘ll also create admin_product_tags_url pointing to "admin/products/#{product_id}/tags", which will look for Admin::TagsController.