In Rails, you can create forms that have fields from nested models. For example, if a person has many phone numbers, you can easily create a form that receives data from the person and from a fixed number of phones. However, when you want to allow the person to insert multiple, indefinite phones, you're in trouble: it's much harder than it should be. Well, not anymore. Check the awesome demo or the project code. =)

Some days ago, I had a hard time trying to make Steak work with javascript pages and factories. So I created a demo app and a tutorial to help others who want to do the same. Through the README I explain how to configure Steak to use a javascript environment only when needed and to choose a faster way when it doesn't.
http://github.com/lailsonbm/contact_manager_app/

Have you already worked with a database Time column and an Active Record model together? If you had, you know: it sucks. Well, not anymore. http://github.com/lailsonbm/time_of_day