Hi,

I'm new to NHibernate and have a lot of problem understanding how to set up a one-to-one relation.

I have a User class that contains a UserInformation and a UserProfile class.
Now I can't understand how I should mapp them with the keys.
I have tried to understand the documentation and also tried google but I couldn't solve it.

If someone could give me some easy instructions that I could follow or just an url to some place where they explain it.
Example code would also work!

Thanks in advance.

The most common way is to use the same value for all three IDs (so userID = 7 corresponds to userInformationID = 7 and userProfileID = 7). In this case, use id generator="foreign" in the UserInformation and UserProfile classes, and map the association as one-to-one on the User side, and <one-to-one constrained="true"> on the UserProfile and UserInformation sides.

If you're using foreign keys, so table UserInformation has UserInformationID and UserID columns that are not the same, then use <one-to-one property-ref="User"> on the User side (so that it knows to use the "User" property in UserInformation to find the matching object), and <one-to-one property-ref="UserInformation" constrained="true"> on the UserInformation side.

After all my problems with this I need to thank you so much for helping me out!

Thanks!