我是一名初学者程序员,我试图让Rails服务器在OS X Lion上运行。当我在命令行键入“rails server”时,出现此错误:Rails服务器无法在OS X Lion上运行
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:777:in `report_activate_error': Could not find RubyGem rails (>= 0) (Gem::LoadError)
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:211:in `activate'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:1056:in `gem'
from /usr/bin/rails:18
您认为该问题的解决方案是什么?任何帮助,你可以提供将不胜感激。谢谢!