This video shows how to use Jasmine to test JavaScript in your Rails applications. Jasmine is a Behavior-Driven Development (BDD) framework for testing your JavaScript code. It does not depend on any other JavaScript frameworks. It does not require a DOM. And it has a clean, obvious syntax so that you can easily write tests.

What happens when your little Rails app makes it big time? What would you learn about your system if you had to double capacity every three months? How do you scale the human side to keep up with the success of the business? There are all questions we’ve been forced to answer at Groupon and we’d like to share some of our success with you. In this experience report we’ll talk about the technology and process behind Groupon and how Rails is scaled in the fastest growing company ever.

Video Producer: …

Early stage web startups need to get a lot done. How do you combine development hyper-drive with changing business requirements and evolving infrastructure without sacrificing quality? Enter cuke. It’s got a light side, a dark side and it keeps the universe together. Our universe consists of Rails, Erlang and unix servers.
http://skillsmatter.com/podcast/agile-scrum/cucumber-startups

Yehuda Katz talks on how Rails 3.0 has been received by the community, a comparison with other similar frameworks, the impact of having different Ruby implementations, and what’s coming in Rails 3.1.
http://www.infoq.com/interviews/Yehuda-Katz-on-Rails-3.x

merge and announced the beginning of a series of efforts from where would emerge Rails 3.0. Since the announcement, the community was surrounded by questions about how the future would look like. Will Rails change its philosophy? Which concepts will Merb bring to Rails? Now, almost two years later, Rails 3 is out and rocking solid. In this talk, José Valim is going to discuss what changed during these two years, expose how Rails 3 will change the way you develop and, finally, tease you with what is …

As anyone who’s been developing in Rails for a while knows, Ruby and Rails are particularly good tools for modeling complexity. However, very little emphasis has been placed on how to *manage* this complexity. “Domain-Driven Design” is a set of principles, patterns, and practices that help developers manage the complexity that comes along with working on large projects in interesting domains. The two ideas that I will focus on are Aggregates and Bounded Contexts. This talk is intended for developers working on longer-term, larger applications that are running in production …

The brand new Rails 3 release has an impressive array of improvements and new features, including full compatibility with JRuby from the onset. So what does running Rails 3 on the JVM with JRuby look like? A super-charged, caffeine-powered locomotive! We’ll explore all the ways JRuby makes sense for Rails 3, showcasing runtime characteristics and true concurrency. We’ll also explore some examples of integrating Java libraries and APIs that leverage the best of both worlds in ways that make sense for green field as well as legacy Java web applications. …

This is a 5 minute video that takes you through the steps of getting CruiseControl.rb up and running with a Ruby on Rails project.

Rails 3 offers several new additions to validations. Here learn how to make a custom error_messages partial, reflect on validations, and clean up complex validations in a model.
http://railscasts.com/episodes/211-validations-in-rails-3

Keep JavaScript out of your HTML content with unobtrusive JavaScript. Here I show how Rails 3 works with this best practice.
http://railscasts.com/episodes/205-unobtrusive-javascript