I'm wondering if there is a way to set references on detached objects in
OpenJPA. I have a simple program with two entities and their corresponding
facades.
The Entities FormControlEntity and FormControlFieldEntity are related and
mapped with cascade=CascadeType.PERSIST.
-> After the call to findByKey(), the entity is detached and gets reattached
when merge() is called.
-> merge() calls EntityManager.merge()
---
//FIRST EXAMPLE - WORKS
FormControlFacade f = new FormControlFacade();
FormControlEntity f_ent = f.findByKey(20000l);
//okay
FormControlFieldEntity ff_ent = new FormControlFieldEntity();
f_ent.getFields().add(ff_ent);
f.merge(f_ent);
------------------------
//SECOND EXAMPLE - FAILS
FormControlFacade f = new FormControlFacade();
FormControlEntity f_ent = f.findByKey(20000l);
//bugged
FormControlFieldFacade ff = new FormControlFieldFacade();
FormControlFieldEntity ff_ent = ff.findByKey(200100l);
f_ent.getFields().add(ff_ent);
f.merge(f_ent);
The given instance "FormControlFieldEntity-FormControlFieldEntity-200100" is
not managed by this context.
---
Is there a way to set references on detached entities?
Can I tell OpenJPA to automatically merge entities that are not managed by
the context?
---
(With Toplink, the code works fine.)
Thanks a lot!
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