detect_named_route_clashed.rb

# As part of blog post "Detect clashing named routed early in rails" 
# http://blog.peelmeagrape.net/2009/3/12/detect-clashing-named-routes-early-in-rails
module IGOpeople
  module Routing
    module BorkOnNamedRouteClash
      def self.included(base)
        base.alias_method_chain(:add_named_route, :checking_clash) if ['development','test'].include?(RAILS_ENV)
      end

      def add_named_route_with_checking_clash(name, path, options = {})
        raise('clashing named route: '+ name.to_s) unless named_routes[name.to_sym].nil?
        add_named_route_without_checking_clash(name,path,options)
      end
    end
  end
end

ActionController::Routing::RouteSet.send :include, IGOpeople::Routing::BorkOnNamedRouteClash