Arel and ActiveRecord

I spoke about Arel and the differences between Arel and Active Record at the August 2012 Austin on Rails meeting. I wanted to clearly delineate the difference between Arel and ActiveRecord::Relations and show how you could drop down to Arel if you needed advanced Active Record queries. My slides are available here: https://speakerdeck.com/u/robmack/p/activerecord-relation-and-arel