appraise "rails-3.2" do gem 'activerecord', "~> 3.2" gem "mongoid", ">= 3.0", "< 4" end appraise "rails-4.0" do gem 'activerecord', "~> 4.0.0" gem "mongoid", "~> 4.0" end appraise "rails-4.1" do gem 'activerecord', "~> 4.1.0" gem "mongoid", "~> 4.0" end appraise "rails-4.2" do gem 'activerecord', "~> 4.2.0" gem "mongoid", "~> 4.0" end appraise "rails-5.0" do gem 'activerecord', "~> 5.0.0.rc1" gem 'activesupport', "~> 5.0.0.rc1" gem 'railties', "~> 5.0.0.rc1" gem 'combustion', '0.5.4' gem 'mongoid', github: 'mongodb/mongoid', ref: '7c2ff52a0c5292b8e6bf3a9a29bbb19abae3dd5f' end