Hi everyone!
I'm working with NHibernate since few weeks ago, and I would like to create a 0..1:1 relationship (Persona vs UserInfo). I tried with one-to-one like this:

(Persona)
<many-to-one name="ToUserInfo"
class="SNG.Model.Authentication.UserInfo"
column="UserInfoId"
unique="true"
cascade="all"/>

(UserInfo)
one-to-one name="ToPersona" class="SNG.Model.Business.Persona" property-ref="ToUserInfo"/>

This is a typical one-to-one. But the database just let me insert one "Persona" with "UserInfoId" to NULL value. I think that this is caused by de "unique=true"....so I've tried to delete this, but then it works like a one-to-many relationship.

Is it possible to create this kind of relationship?

Thanks!