Helping Rails Newbies identify version-specific information on web pages

Answer 1

When I started with Rails 2.x last year, I got some books that were talking on Rails 1.x

There were things that changed from 1.x to 2.x, such as the way scaffolding works or that a framework like streamlined stopped from existence. On the other hand, there were some concepts and points that stayed valid from Rails 1.x to 2.x For example, most tutorials and documents start on talking about the model layer, how easy it is to use ActiveRecord and how you have REST for dealing with basic CRUD operations.

In general, I think with such an active community, it's actually one of the strong point of rails that you get so many shifts in innovation so fast. Actually, it is one of the strong points of the open-source community.

Answer 2

Check out API Dock. It has an excellent, annotated, and more importantly, versioned documentation of the rails API.