如何在Max OS X Snow Leopard中降级rails版本？

Question

I have Mac OS X Snow leopard that has pre-installed Ruby 1.8.7 and Rails 3.0.1 I need to work with Redmine a bit that requires Rails 2.3.5

Is it possible to correctly downgrade my current rails 3.0.1 to rails 2.3.5?

Answer 1

您不需要降级，RubyGems允许您安装同一个库的多个版本。

$ gem install rails -v 2.3.5

Answer 2

为了避免版本控制地狱，你也可以使用rvm ，它允许你在同一台机器上安装多个ruby版本和“gemsets”并在它们之间切换。