Treffer: Rails Writ Large.

The article explores the components of the Ruby on Rails Web application software. The framework follows the Model-View-Controller design pattern. The ActiveRecord component has three major features: it associations allow the user to define relationships between ActiveRecord classes; callbacks provide a set of hooks into the life cycle of objects, where one can add behavior and validations are a special kind of callback that make standard data validation routines a cinch. ActionController classes define actions or public methods that are accessible from the Web. One category of changes in Rails 1.1 involves creating Web services, embracing certain aspects of the hypertext transfer protocol so that application program interfaces can be implemented easily.