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我是Rails和Ruby的新手。我试图创建在OS X的终端使用以下命令测试项目:创建测试轨道项目时出错
rails new project_manager
执行该命令提供了以下错误:
/System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:827: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:261:in `activate'
from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems.rb:68:in `gem'
from /usr/bin/rails:18
这个错误是什么意思?任何帮助表示赞赏!