I am having a problem mapping a one-to-one association which seems to go against all of the documentation. Just wondering if this is a bug before I tear any more hair out.

Here is the exception I am getting:



Nowhere in the docs for 1-to-1 associations with a shared PK does it say that the foreign identifier must be explicitly mapped and have the associated property in the child class. If I do map it, I get all sorts of problems when saving/updating. My child class does contain a reference to the parent 'Publisher' entity

Here are the mappings:

Have a look at this post and see if it helps. Use a different generator.

http://forum.hibernate.org/viewtopic.php?p=2371680

Nope, that's not it. I have the generator set correctly on the child class to foreign. Thanks anyway.

Sorry about that, I should have read more closely.

In that case you don't have a PublisherId on your PublisherLimits class. Keep in mind that a generator is just how NHibernate assigns it its value. If it is "assigned" then NHibernate doesn't assign anything. If it is identity then it relies on the database to set it. If it is foreign it relies on the ID of the provided property.

I know this may seem a little dirty to have to create a property (you could also use a field) for a primary key value that you really never want updated (since you would update the one-to-one instead), but that's currently what is required.