Can someone suggest how I might validate a new record not only by the key, but also by another field? In this case, I'd like there to be only one record per e-mail address as well as only one per user. (One record per user name currently works fine, but it's still possible for someone to create a second record with a new user name. Having a unique e-mail requirement is intended to provide one more small barrier to this.)
Thanks.
Thanks.