Are there any Ruby ORMs which use cursors or smart fetch?

Question

I\'m looking for a Ruby ORM to replace ActiveRecord. I\'ve been looking at Sequel and DataMapper. They look pretty good however none of them seems to do the basic: not loading e

Answer 1

ActiveRecord actually has an almost transparent batch mode:

User.find_each do |user|
  NewsLetter.weekly_deliver(user)
end