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Undo with Paper Trail
Undo and redo behavior is easy to add with a versioning gem such as Paper Trail. Learn how to add an undo link to any model's flash message.
(13 minutes)
Pagination with Kaminari
If you need pagination in Rails 3 try out Kaminari. It is a clean, flexible solution which uses scopes to flow nicely with Active Record queries. Did I mention it also works with Mongoid?
(8 minutes)
CarrierWave File Uploads
CarrierWave makes it easy and clean to add file uploads to your application. It supports a variety of ORMs, frameworks and image processors.
(9 minutes)
Metrics Metrics Metrics
Metric Fu, Metrical, SimpleCov, Rails Best Practices, and more are covered in this episode on metrics.
(7 minutes)
MetaWhere & MetaSearch
MetaWhere provides a way to do complex find conditions without SQL in Active Record. MetaSearch makes it easy to create search forms with many find options.
(8 minutes)
Authentication from Scratch
Password authentication is not too complicated to make from scratch, it will also help to get a better understanding of how it works.
(15 minutes)
Notifications in Rails 3
Rails 3 comes with instrument support through the ActiveSupport::Notifications class. Call "subscribe" to listen to notifications, and "instrument" to send them.
(10 minutes)
Offline Apps Part 2
Learn how to make a site usable offline with HTML 5 localStorage. This last part of the series covers jquery-tmpl and jquery-offline.
(14 minutes)
Offline Apps Part 1
Learn how to make a site usable offline through an HTML 5 cache manifest. This first part of the series covers rack-offline and problems you may run into.
(10 minutes)
AJAX History State
The new pushState function in JavaScript allows us to change the full URL with AJAX. This means the back button, reloading, and bookmark support can be easily added.
(10 minutes)