In the API docs at http://api.rubyonrails.org/classes/ActiveRecord/Migration.html, its listed that add_column takes two parameters. Migration seems to error on that with "wrong number of arguments (2 for 3)" as you need to add a type as a parameter which makes complete sense, but is unfortunately undocumented. Tony -------------- next part -------------- An HTML attachment was scrubbed... URL: http://wrath.rubyonrails.org/pipermail/rails/attachments/20060518/edcbb3dd/attachment.html