If you've tried to mount RESTful resources at '/' with Padrino, you've probably run into issues with its router, and had to :map each action (or develop some idiom to generate the mappings for you). Padrino's router is pretty opinionated; when you're using named controllers, you'll want to make use of `:parent` directives -- which you can't, if …

config.ru

# You'll need to add 'rack-rewrite' to your Gemfile.
require 'rack/rewrite'
require File.expand_path("../config/boot.rb", __FILE__)

# lazy load the application, instantiating routes.
application = Padrino.application

# Determine which routes NOT to redirect to your root resource.
reserved_routes = YourProject::App.routes.map{|r| 
  r.path_for_generation.scan /[a-zA-Z0-9]+/i 
}.flatten!.uniq!

# Add any directories or files under #{Padrino.root}/public.
reserved_routes.concat Dir.entries(Padrino.root('public')).select{ |f|
  not f.start_with?('.')
}

# Use Rack::Rewrite to check if the request URL begins with a 
# reserved_route name. If it does not, rewrite the URL 
# internally so that it directs to your desired "root" resource 
# controller. Similarly, setup a 302 redirect for any requests 
# made from the outside which should be directed to the root 
# resource controller, as well.
use Rack::Rewrite do
  rewrite %r{^\/(?!#{reserved_routes.join('|')})(.*)}, '/users/$1'
  r302 %r{^/users/(.*)$}, '/$1'
end

# Start the app.
run application