(rails 2.3 feature) batch updating all definitions

gistfile1.rb

Definition.find_in_batches { |group| group.each { |item| item.save } }

Video.find_in_batches { |group| group.each { |item| item.save } }

AttachedImage.find_in_batches(:conditions => 'parent_id is null') { |group| group.each { |item| item.save } }