Appendix A. Migrating to Rails 1.2

This appendix lists features and changes between Rails 1.1.6 and Rails 1.2. Old (1.1.6) code will run under Rails 1.2, but you'll get warnings for deprecated features. Support for deprecated features will be removed in the next major release of Rails (2.0). The quickest way to find out what needs updating is to run your Rails 1.1.6 application under Rails 1.2, and check your logs for deprecation warnings.