缺少Rails 2.2.2宝石

我对Linux比较陌生，但我试图在Ubuntu 11.10上设置开发环境。我安装了ruby 1.8和rails 2.2.2，但netbeans似乎告诉我，否则会出现以下错误。缺少Rails 2.2.2宝石

Missing the Rails 2.2.2 gem. Please gem install -v=2.2.2 rails, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed.

宝石列表

actionmailer (2.2.2) 
actionpack (2.2.2) 
activerecord (2.2.2) 
activeresource (2.2.2) 
activesupport (2.2.2) 
rack (1.0.1) 
rails (2.2.2) 
rake (0.9.2.2)

宝石列表-d轨

rails (2.2.2) 
Author: David Heinemeier Hansson 
Rubyforge: http://rubyforge.org/projects/rails 
Homepage: http://www.rubyonrails.org 
Installed at: /usr/lib/ruby/gems/1.8 

Web-application framework with template engine, control-flow layer, 
and ORM.

我见过类似的问题，但我还是一直没能得到任何不同的结果。

来源

2012-01-31 Haronious