Ruby 有人在Mac上使用mongo3作为gui界面吗？我可以'；我不能运行它

当我在运行

gem安装mongo3

之后运行mongo3时。我有下面的问题

F, [2013-05-08T20:35:18.376873 #8487] FATAL -- : undefined method `helpers' for CollectionHelper:Module (NoMethodError)
/Users/shuxuan/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/mongo3-0.1.5/lib/helpers/collection_helper.rb:15:in `<module:CollectionHelper>'
/Users/shuxuan/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/mongo3-0.1.5/lib/helpers/collection_helper.rb:14:in `<top (required)>'
/Users/shuxuan/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/mongo3-0.1.5/lib/mongo3.rb:49:in `load'

F[2013-05-08T20:35:18.376873#8487]致命--：CollectionHelper的未定义方法“helpers”：模块（命名错误）
/Users/shuxuan/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/mongo3-0.1.5/lib/helpers/collection\u helper.rb:15:in`'
/Users/shuxuan/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/mongo3-0.1.5/lib/helpers/collection\u helper.rb:14:in`'
/Users/shuxuan/.rvm/gems/ruby-1.9.3-p392@rails3tutorial2ndEd/gems/mongo3-0.1.5/lib/mongo3.rb:49:in'load'

目前的解决方法（来自github讨论）是使用较旧的sinatra

gem uninstall sinatra 
gem install sinatra -v 1.3.3