appraise 'rails_3.2' do
  gem 'activerecord', '~> 3.2.21'
end

appraise 'rails_4.0' do
  gem 'activerecord', '~> 4.0.13'
end

appraise 'rails_4.1' do
  gem 'activerecord', '~> 4.1.10'
end

appraise 'rails_4.2' do
  gem 'activerecord', '~> 4.2.4'
end

appraise 'rails_5' do
  gem 'activerecord', '~> 5.0.0.beta2'
end