[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-271) subclass lazy fetching returns wrong object
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http://opensource.atlassian.com/projects/hibernate/browse/HHH-271?page=co...
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Fred Arters commented on HHH-271:
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6 years later and I ran into this same situation. I found that the lazy fetch was causing
the problem from another ticket, regarding using discriminator fields with
InheritanceType=JOINED. The answer to that rejected ticket was that hibernate was elegant
enough not to need discriminator fields for joined inheritance. Someone brought up that
if hibernate supported discriminator fields in these cases, lazy fetches for inherited
classes would return the correct sub-type. Seems like the answer to that ticket and the
answer to this one are in conflict. Additionally, I would, and did not, expect that
changing the fetch type to lazy would return a different result than eager fetch. In my
case an eager fetch is not going to hurt me so I will do that.
subclass lazy fetching returns wrong object
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Key: HHH-271
URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-271
Project: Hibernate Core
Issue Type: Bug
Components: core
Affects Versions: 3.0 rc 1
Reporter: Michael Kopp
I have a table per hierarchy mapping with discriminators. Another class has a many-to-one
relation to the root class. When my program accesses the getter for this many-to-one
relation, it should get a subclass of the root class. What it gets is a CGLIB proxy of the
root class (com.j2fe.workflow.definition.Node$$EnhancerByCGLIB$$63e262e8).
When I turn of lazy fetching on the root class (Node) everything works as expected.
I have another class with a one-to-many collection of the root class. If I iterate
through this before accessing the many-to-one getter, It also works correctly.
One important note at last, the discriminator is set to force.
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