我正在尝试运行this app，这是一年前的最后一次提交。在花了一段时间试图安装所有的宝石和宝石依赖（包括评论metric-fu宝石）之后，我能够获得绿灯“捆绑完成”的消息。但是，在运行服务器时，我收到以下错误日志：
Rails 3.2.9 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
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 /Users/zallanx/rails_projects/smartr/config/environment.rb:5)
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 /Users/zallanx/rails_projects/smartr/config/environment.rb:5)
Exiting
/Users/zallanx/rails_projects/smartr/config/environments/development.rb:26:in `block in <top (required)>': uninitialized constant Sass::Plugin (NameError)
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/railtie/configurable.rb:24:in `class_eval'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/railtie/configurable.rb:24:in `configure'
from /Users/zallanx/rails_projects/smartr/config/environments/development.rb:1:in `<top (required)>'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/engine.rb:571:in `block in <class:Engine>'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/initializable.rb:30:in `instance_exec'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/initializable.rb:30:in `run'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/initializable.rb:55:in `block in run_initializers'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/initializable.rb:54:in `each'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/initializable.rb:54:in `run_initializers'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/application.rb:136:in `initialize!'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/railtie/configurable.rb:30:in `method_missing'
from /Users/zallanx/rails_projects/smartr/config/environment.rb:5:in `<top (required)>'
from /Users/zallanx/rails_projects/smartr/config.ru:2:in `block in <main>'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize'
from /Users/zallanx/rails_projects/smartr/config.ru:1:in `new'
from /Users/zallanx/rails_projects/smartr/config.ru:1:in `<main>'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/rack-1.4.1/lib/rack/builder.rb:40:in `eval'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/rack-1.4.1/lib/rack/builder.rb:40:in `parse_file'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/rack-1.4.1/lib/rack/server.rb:200:in `app'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/commands/server.rb:46:in `app'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/rack-1.4.1/lib/rack/server.rb:301:in `wrapped_app'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/rack-1.4.1/lib/rack/server.rb:252:in `start'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/commands/server.rb:70:in `start'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/commands.rb:55:in `block in <top (required)>'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/commands.rb:50:in `tap'
from /Users/zallanx/.rvm/gems/ruby-1.9.3-p194@rails3tutorial2ndEd/gems/railties-3.2.9/lib/rails/commands.rb:50:in `<top (required)>'
from script/rails:9:in `require'
from script/rails:9:in `<main>'
旧的Rails 2.3插件是否会让我失望？这是我在Hartl的Rails教程之后的第一个“真实世界”项目，所以不幸的是我没有很多处理这类错误的经验。该应用程序的Gemfile名为smartr，为linked。谢谢！
答案 0 :(得分：1)
当我在vendor文件夹中有一些2.x插件时，我遇到了类似的错误。删除后，错误消失了。
答案 1 :(得分：1)
Sass在gemfile中，但它的版本不受限制。由于该项目在一年内未被修改，该项目可能期望更旧版本的Sass。您应该尝试在Gemfile中研究降级sass并执行bundle update以查看会发生什么。另外，Rails 3.2一年前还没出来，所以我不会在Rails 3.2上运行这个应用程序。
答案 2 :(得分：1)
似乎缺少一些名为Sass :: Plugin的东西或者没有从您的应用中正确加载。
检查上面提到的插件是否存在
HTH
答案 3 :(得分：1)
Here是一篇文章，可以帮助您运行旧的应用程序wint Rails 4.请阅读本部分没有更多的供应商/插件，它描述了如何解决您的一个问题。
关于sass-plugin的第二个问题可以通过在development.rb中注释26个字符串来解决。它必须写在Rails 3 app中的其他地方。