How to get a specific “commit” of a gem from github?

Question

I\'m using rails_admin, and since it is in (very) active development, bugs turn up every now and then.

There are no versions for the gem as far as I can tell, for th

Answer 1

A shorter version:

gem 'rails', :github => 'rails/rails', :ref => '4aded'

Or, in Ruby 1.9+

gem 'rails', github: 'rails/rails', ref: '4aded'