The fix for HHH-12436 involves correcting the foreign key direction for
some one-to-one assocations. In the process of making changes I see that we
have a unit test that has a unidirectional one-to-one association mapped
with constrained="false". [1]
ModelBinder assumes that means that
the foreig
If does make sense for a
unidirectional association, and the foreign key really should be
FROM_PARENT, then, AFAICT, the only way the unit tests could pass is if
Hibernate assumes such associations would have an implicit
ignoreNotFound="true".
As an example, take a look at OptionalOneToOneTest [1