Daryl, You can also set a fetch plan on a single query. But, you have to cast the query to OpenJPAQuery (similarly to the way you cast the entity manager).
I had some problems getting to work that I didn't have time to figure out - so I went with setting fetch plans on the entity manager. Jay Daryl Stultz wrote: > On Tue, Apr 7, 2009 at 1:11 AM, Jay McHugh <[email protected]> wrote: > >> If that doesn't work - or you (cannot/do not want to) eagerly fetch >> the relationship all of the time - a quick stab at what using fetch >> groups might look like this: >> >> <example> >> >> // assuming you already have an entity manager named 'entityManager' >> OpenJPAEntityManager em = OpenJPAPersistence.cast(entityManager); >> >> FetchPlan plan = em.getFetchPlan(); >> plan.addField(GrandParent.class, "parents"); >> plan.addField(Parent.class, "children"); >> >> Query query = em.createQuery("select gp from GrandParent as gp"); >> >> </example> >> > > Ah, so modifying the fetch plan is for the lifetime of the em? I think I > like that. Thanks for the help. >
