Oldie_rails_models
Basic support of Rails 2 ActiveRecord methods in Rails 4. Gem adds ailases for old Rails 2 sintax.
Installation
Simply add into Gemfile:
gem 'oldie_rails_models'
After that you can import models from old Rails 2 project to Rails 4 and use them as usual.
Credits
Gem created under support of https://gettable.ru.