[jbossseam-issues] [JBoss JIRA] Commented: (JBSEAM-1596) Unique Constraint Validator

[ http://jira.jboss.com/jira/browse/JBSEAM-1596?page=comments#action_12384569 ] Adam Warski commented on JBSEAM-1596: ------------------------------------- But isn't the lack of a unique constraint validator a violation of DRY? I think it's quite a common constraint, but is quite hard to handle right now. The only reasonable choice is a custom validator ... as verifying it the model can cause problems --- in case of a validation error detected, you have to prevent changes in entity beans to be commited, and the only possible way to do that is rolling back the transaction. As a rollback exception can't be caught, it's not possible to display a user-friendly message on the same page, from thich the form was submitted. Adam -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira