OSDC 2009 Rails Turtorial

This document discusses various Rails concepts and tools including MVC, ActiveRecord, templates/helpers, libraries/plugins, deployment, and internationalization. It provides code examples for features like validations, callbacks, counter caches, named scopes, STI, polymorphic associations, pagination, Ajax forms, and exception handling. Various plugins are described like attachment_fu, acts_as_taggable, will_paginate, and facebox_render for adding functionality. Deployment topics covered include mailers, exception tracking, and Capistrano.