在 Rails 3.1 中，想在 rails console 里测试一下路由规则，于是输入
r = Rails.application.routes
r.recognize_path "/"
结果报 Rack 的错误，看了一下 rack 的代码，晕， 遇到过的兄弟帮忙看看啥原因？
irb(main):002:0> r = Rails.application.routes
irb(main):002:0> r.recognize_path "/"
RuntimeError: route set not finalized
from C:/software/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rack-mount-0.8.3/lib/rack/mount/route_set.rb:81:in `recognize'
from C:/software/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/actionpack-3.1.1/lib/action_dispatch/routing/route_set.rb:546:in `recognize_path'
from (irb):2
from C:/software/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.1/lib/rails/commands/console.rb:45:in `start'
from C:/software/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.1/lib/rails/commands/console.rb:8:in `start'
from C:/software/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/railties-3.1.1/lib/rails/commands.rb:40:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
irb(main):003:0>
C:/software/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/rack-mount-0.8.3/lib/rack/mount/route_set.rb:81:in `recognize'
def recognize(obj) raise 'route set not finalized' unless @recognition_graph
说是@recognition_graph未被初始化
继续排查到 rehash 中初始化了，可是谁调用 rehash，不得知 def rehash #:nodoc: Utils.debug "rehashing" @recognition_keys = build_recognition_keys
@recognition_graph = build_recognition_graph
module Rack::Mount class RouteSet def initialize(options = {}, &block) if block_given? yield self rehash <=====================这里调用了 end
end
可是，我如何能在 console 中传入一个 block 呢，于是乎越想越糊涂，
得，有经验的说说，你们如何在测试路由呢，除了写单元测试外啊，有什么比较快姐的方式。
ruby-1.9.2-p180 :014 > Rails.application.routes.finalize!
=>
ruby-1.9.2-p180 :015 > Rails.application.routes.recognize_path("/users", :method => :get)
Creating scope :public. Overwriting existing method Link.public.
Creating scope :private. Overwriting existing method Link.private.
Creating scope :protected. Overwriting existing method Link.protected.
=> {:controller=>"links", :action=>"redirect", :id=>"users"}
手动 finalize! 一下试试...