[hibernate-dev] unique-key attribute for many-to-one elements

hey, I'd like to setup a multi-column unique constraint, which i'd normally be able to do with the unique-key attribute in a column element: <property name="FirstName"> <column name="FirstName" unique-key="PersonFirstLastName"/> </property> <property name="LastName" > <column name="LastName" unique-key="PersonFirstLastName"/> </property> but if I want to have a many-to-one element, unique-key is not listed as one of the available attributes. <property name="IsLeadDeveloper"> <column name="IsLeadDeveloper" unique-key="GroupLeadDeveloper"/> </property> <property name="Group" > <many-to-one name="GroupID" unique-key="GroupLeadDeveloper"/> </property> I'm working with CastleProject/ActiveRecord, and submitted a JIRA issue to the project, but they suggested that Hibernate does not support this and that I should post a JIRA issue here. Just want to verify that I'm not taking the wrong approach before I post it to JIRA. thx, foltz