Hi! I have a field "default", and i wish to validate that only one of the records is true, the remaining must be false. If there are no records, the first one created must be default=true. Apart from that, when any new/updated record is set to default=true, the remaining ones must be default=false. How do you accomplish this? Thanks in advance, Rodrigo. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://wrath.rubyonrails.org/pipermail/rails/attachments/20060829/adcd42fa/attachment.html