I wanted to try the new release candidate for Ruby on Rails 4.1.0. I have RVM installed, but didn’t know how to approach installing a different version of Rails. Once I looked online, I was reminded of something I forgot. Gemsets. So I did the following:
rvm gemset create 4.1.0rc1
rvm gemset use 4.1.0rc1
gem install rails -v 4.1.0rc1
I first create a gemset called 4.1.0rc1 so I can install another version of the Rails gem without interfering with the stable version of my already install Rails 4.0.3. Switch over to that gemset using gemset use, then install the desired version of Rails. A gemset is similar to how git has branches is many ways. You can create a new branch and make changes without messing up your master branch.