Hibernate one-to-one: getId() without fetching entire object
- by Rob
I want to fetch the id of a one-to-one relationship without loading the entire object. I thought I could do this using lazy loading as follows:
class Foo {
@OneToOne(fetch = FetchType.LAZY, optional = false)
private Bar bar;
}
Foo f = session.get(Foo.class, fooId); // Hibernate fetches Foo
f.getBar(); // Hibernate fetches full Bar object
f.getBar().getId(); // No further fetch, returns id
I want f.getBar() to not trigger another fetch. I want hibernate to give me a proxy object that allows me to call .getId() without actually fetching the Bar object.
What am I doing wrong?
