How do I “activate” a different version of a particular gem?

Question

I want to switch between rails 2.3.10 as the \"active\" gem for my OS, so that I can invoke it at the command line.

Is it possible to do this? I\'m not using rvm. Ma

Answer 1

You can use RVM

Then you can also use Bundler afterwards, which manages gem dependencies fine.

In your Gemfile

gem "rails", "2.3.10"

and in your application

require 'rubygems'
require 'bundler/setup'

and you're done.