Here we continue upgrading an application to Rails 3 by getting our specs up and running and going through the rails_upgrade plugin.

In the first part of this series on upgrading a Rails 2 application to Rails 3, we'll start off by setting up Rails 3.0 Release Candidate in a clean environment. The rails_upgrade plugin will then help us determine what needs upgrading.

Embedded flash notices, permanent cookies, and the details of respond_with are in this episode.

There are a number of libraries to help create graphs. Here I show how to integrate Highcharts into a Rails app.

The router in Rails 3 is fully compatible with Rack. Learn how to embed Sinatra into an app, handle redirects, and improve on Rails Metal.

It is now possible to add subdomains to Rails 3 without the use of additional plugins. Learn how in this episode.

Generating PDFs in plain Ruby can be a lot of work. Instead, consider generating PDFs from HTML using PDFKit.

In Rails 3 the non-database functionality of Active Record is extracted out into Active Model. This allows you to cleanly add validations and other features to tableless models.

Generators in Rails 3 have been rewritten to use Thor which means the code used to create a generator is quite different. Here you will learn the new way to make generators in Rails 3.

See how to create a multi-step (wizard) form from scratch in this episode.