Rails 2.3風格的插件：爲什麼棄用警告？

Question

在部署到Heroku時，我收到了一組關於vendor/plugins文件夾的棄用警告（請參閱下文）。我有一個.gitkeep聲明，沒有別的。有什麼我需要做的嗎？

2012-12-13T02:56:59+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5) 
2012-12-13T02:56:59+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5) 
2012-12-13T02:56:59+00:00 app[web.1]: DEPRECATION WARNING: You have Rails 2.3-style plugins in vendor/plugins! Support for these plugins will be removed in Rails 4.0. Move them out and bundle them in your Gemfile, or fold them in to your app as lib/myplugin/* and config/initializers/myplugin.rb. See the release notes for more on this: http://weblog.rubyonrails.org/2012/1/4/rails-3-2-0-rc2-has-been-released. (called from <top (required)> at /app/config/environment.rb:5) 

Answer 1

的Heroku已經指出了這一點，他們是在它已經工作了Rails的4

Heroku的工作原理是注射的插件，它會導致這種情況發生

-----> Rails plugin injection 
     Injecting rails_log_stdout 
     Injecting rails3_serve_static_assets 

Rails 2.3-style plugins and deprecation warnings running task in Heroku

Answer 2

我只注意到了Heroku現在的解決方法。

Injecting plugin 'rails_log_stdout' 
    Injecting plugin 'rails3_serve_static_assets' 
    Add 'rails_12factor' gem to your Gemfile to skip plugin injection