How to have multiple versions of Ruby AND Rails, and their combinations on Windows?

Question

Since Windows doesn\'t support rvm (Ruby version Manager), how do we have

• Ruby 1.8.7, Rails 2.3.8
• Ruby 1.8.7, Rails 3.0.0
• Ruby 1.9.2, Rai

Answer 1

From what I could tell, uru only manages versions of RUBY.

For versions of RAILS, where you've already 2 or more versions on your local maching, to open a project in one's development environment, using an older version of rails, you enter the following in the command window:

rails _3.2.11_ s

where 3.2.11 represents the version of RAILS you want it to use, which you want to be the same version as listed in your project's file:

Gemfile.lock