Route handler

gistfile1.rb

ActionController::Routing::Routes.draw do |map|
  ...
  map.connect ':route', :controller => 'route_handler', :action => 'rewrite'
  ...
end

class RouteHandlerController < ApplicationController
  def rewrite
    # suponiendo una estructura RewriteRule(short_uri, uri, ...) ie: 
    #  "things-to-do-in-buenos-aires", "/aaa/bbbb/argentina/buenos-aires" 
    r = RewriteRule.find_by_short_uri params[:route]
    r ? redirect_to(r.uri + "?rewrite=" + r.short_uri) : raise(RoutingError) # o lo que tengas que hacer con rutas que no enconstras en la bd
  end
end