I''m going by <http://railsforum.com/viewtopic.php?id=1011> and am curious about this line: class AddUserIdToPosts < ActiveRecord::Migration AddUserIdToPosts is a class, ok. ActiveRecord is a module, ok. Migration is a class? This is an example of a mix-in? I don''t really understand this line :( -Thufir --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org To unsubscribe from this group, send email to rubyonrails-talk-unsubscribe-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---