module ActionDispatch::Routing::Mapper::Scoping

end
resources :posts
namespace :admin, as: "sekret" do
# generates +sekret_posts_path+ rather than +admin_posts_path+

end
resources :posts
namespace :admin, module: "sekret" do
# maps to +Sekret::PostsController+ rather than +Admin::PostsController+

end
resources :posts
namespace :admin, path: "sekret" do
# accessible through /sekret/posts rather than /admin/posts

Resources#resources.
For options, see Base#match. For +:shallow_path+ option, see

options all default to the name of the namespace.
The +:path+, +:as+, +:module+, +:shallow_path+, and +:shallow_prefix+

=== Options

admin_post DELETE /admin/posts/:id(.:format) admin/posts#destroy
admin_post PATCH/PUT /admin/posts/:id(.:format) admin/posts#update
admin_post GET /admin/posts/:id(.:format) admin/posts#show
edit_admin_post GET /admin/posts/:id/edit(.:format) admin/posts#edit
new_admin_post GET /admin/posts/new(.:format) admin/posts#new
admin_posts POST /admin/posts(.:format) admin/posts#create
admin_posts GET /admin/posts(.:format) admin/posts#index

This generates the following routes:

end
resources :posts
namespace :admin do

Scopes routes to a specific namespace. For example:

def namespace(path, options = {}, &block)
  path = path.to_s
  defaults = {
    module:         path,
    as:             options.fetch(:as, path),
    shallow_path:   options.fetch(:path, path),
    shallow_prefix: options.fetch(:as, path)
  }
  path_scope(options.delete(:path) { path }) do
    scope(defaults.merge!(options), &block)
  end
end