Gemset：此系统上当前未安装 Rails。答案

【问题标题】：Gemset: Rails is not currently installed on this system.Gemset：此系统上当前未安装 Rails。
【发布时间】：2013-02-05 10:32:13
【问题描述】：

macbook$ rvm gemset list_all

gemsets for ruby-1.9.2-p320 (found in /Users/macbook/.rvm/gems/ruby-1.9.2-p320)
   global


gemsets for ruby-1.9.3-p194 (found in /Users/macbook/.rvm/gems/ruby-1.9.3-p194)
   nice
   global     

macbook$ rvm use ruby-1.9.3-p194@nice
Using /Users/macbook/.rvm/gems/ruby-1.9.3-p194@nice with gemset global
macbook$ rails --version
Rails is not currently installed on this system. To get the latest version, simply type:

    $ sudo gem install rails

You can then rerun your "rails" command.

macbook$ sudo gem install rails
1 gem successfully installed.
macbook$ rails --version
Rails is not currently installed on this system. To get the latest version, simply type:

    $ sudo gem install rails

You can then rerun your "rails" command.

【问题讨论】：

试试gem install rails而不是sudo gem install rails

标签： ruby-on-rails ruby-on-rails-3 gemset

【解决方案1】：

macbook$ rvm use ruby-1.9.3-p194
Using /Users/macbook/.rvm/gems/ruby-1.9.3-p194
macbook$ rails --version
Rails 3.2.11

【讨论】：