Latest Screencasts

See how to create a multistep (wizard) form from scratch in this episode. Watch this screencast

Learn some advanced techniques regarding named scopes and get an introduction to Arel in this episode. Watch this screencast

Learn how to refactor a set of conditional Active Record queries using a Dynamic Delegator. Watch this screencast

ActiveRecord 3.0’s big new feature is a brand new finder API that is backed by ActiveRelation, or Arel for short. Arel is a Ruby implementation of relational algebra. This week’s screencast will be a hands-on demonstration of the new ActiveRecord finder API and an article that will cover the topic... Watch this screencast

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. Watch this screencast

Rails 3 introduces a new query interface for performing finds in Active Record. See how it works along with the changes in named scopes. Watch this screencast

Handling multiple models in a single form is much easier with the accepts_nested_attributes_for method. See how to use this method to handle nested model fields. Watch this screencast

If you want to create a model without a database backend, you simply need to define a couple methods in the model like I show in this episode. Watch this screencast

Learn how to set up a one-to-many or many-to-many association which is entirely embedded into a single column through a string or bitmask. Watch this screencast

The :include and :joins options for the find method can be a little confusing because they are so similar. In this episode I show specifically when to use which option. Watch this screencast