注入路由从宝石到rails 3 routes.rb使用Railties（设计问题）

Question

我想自动注入一条路线从我的宝石到宿主应用程序使用railtie。到目前为止，我有这样的事情：

module Fabes 
    class FabesRailtie < ::Rails::Railtie 
    ActionController::Base.send :include, Fabes::Helper 
    ActionController::Base.helper Fabes::Helper 

    initializer 'fabes.routes', after: :after_initialize do |app| 
     app.routes.draw do 
     match '/fabes' => Fabes::Admin, as: :fabes_admin 
     end 
    end 
    end 
end 

这是工作（正从主机应用程序调用），但是当我尝试访问/fabes路线或只列出了路线，它与有一项错误而失败：

fuzzyalej@fuzzyalej:~/code/fabes-rails-example (master *)$ rake routes --trace 
** Invoke routes (first_time) 
** Invoke environment (first_time) 
** Execute environment 
rake aborted! 
undefined method `failure_app=' for nil:NilClass 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/devise-2.1.2/lib/devise.rb:406:in `configure_warden!' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/devise-2.1.2/lib/devise/rails/routes.rb:20:in `finalize_with_devise!' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/actionpack-3.2.6/lib/action_dispatch/routing/route_set.rb:261:in `draw' 
/Users/fuzzyalej/code/fabes/lib/fabes/railtie.rb:7:in `block in <class:FabesRailtie>' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.6/lib/rails/initializable.rb:30:in `instance_exec' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.6/lib/rails/initializable.rb:30:in `run' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.6/lib/rails/initializable.rb:55:in `block in run_initializers' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.6/lib/rails/initializable.rb:54:in `each' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.6/lib/rails/initializable.rb:54:in `run_initializers' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.6/lib/rails/application.rb:136:in `initialize!' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.6/lib/rails/railtie/configurable.rb:30:in `method_missing' 
/Users/fuzzyalej/code/fabes-rails-example/config/environment.rb:5:in `<top (required)>' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `block in require' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:236:in `load_dependency' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/activesupport-3.2.6/lib/active_support/dependencies.rb:251:in `require' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.6/lib/rails/application.rb:103:in `require_environment!' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/railties-3.2.6/lib/rails/application.rb:292:in `block (2 levels) in initialize_tasks' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `call' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:205:in `block in execute' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `each' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:200:in `execute' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:158:in `block in invoke_with_call_chain' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:176:in `block in invoke_prerequisites' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:174:in `each' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:174:in `invoke_prerequisites' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:157:in `block in invoke_with_call_chain' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/1.9.1/monitor.rb:211:in `mon_synchronize' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:151:in `invoke_with_call_chain' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/task.rb:144:in `invoke' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:116:in `invoke_task' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block (2 levels) in top_level' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `each' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:94:in `block in top_level' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:88:in `top_level' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:66:in `block in run' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/bin/rake:23:in `load' 
/Users/fuzzyalej/.rbenv/versions/1.9.3-p194/bin/rake:23:in `<main>' 
Tasks: TOP => routes => environment 

我不知道我是否可以注入一个直接路由这样或相反，我将不得不使用发电机..

在这个问题上有什么想法？

Answer 1

在你的gem的route.rb文件中定义你的路由，然后安装引擎是这种情况下的方法。

“官方指南”： http://edgeguides.rubyonrails.org/engines.html

当然，还有是一个RailsCast插曲覆盖你可能需要： http://railscasts.com/episodes/277-mountable-engines

希望这有助于。