A many-to-many association can be edited through checkboxes in a form. Here I show how to do this with a has_many through association compete with clickable labels. (6 minutes)

Sphinx is a full-text search engine for use with MySQL or PostgreSQL. Learn how to add Thinking Sphinx by defining an index on your model and searching with various options. (10 minutes)

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)

The new Active Record query methods in Rails 3 might seem like magic at first. But in this episode I unravel how it works by browsing the Rails 3 source code. (11 minutes)

See how to create a multistep (wizard) form from scratch in this episode. (15 minutes)

Learn some advanced techniques regarding named scopes and get an introduction to Arel in this episode. (9 minutes)

Learn how to refactor a set of conditional Active Record queries using a Dynamic Delegator. (7 minutes)

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. (9 minutes)

Rails 3 introduces a new query interface for performing finds in Active Record. See how it works along with the changes in named scopes. (10 minutes)

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. (11 minutes)