appraise 'activerecord-4.1' do gem 'activerecord', '~> 4.1.0' gem 'foreigner', :git => 'https://github.com/matthuhiggins/foreigner.git' platforms :ruby, :rbx do gem 'mysql2', '~> 0.3.20' end end appraise 'activerecord-4.2' do gem 'activerecord', '~> 4.2.0' platforms :ruby, :rbx do gem 'mysql2', '~> 0.3.20' end end appraise 'activerecord-edge' do gem 'activerecord', github: 'rails/rails' gem 'arel', github: 'rails/arel' end