I am trying to save a CDT to a datastore which has another CDT as a child object

Jin Pheh

Certified Associate Developer

over 12 years ago

I am trying to save a CDT to a datastore which has another CDT as a child object but I am receiving a 'cannot save a null or transient value' error from hibernate.

I would like to save both objects in a single transaction and I have mapped the relationship with 'Cascade=PERSIST' to achieve this but still haven't been able to achieve this. I have also tried setting Cascade to 'ALL' with the same results. Does anyone have any ideas about what else may be wrong?...

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0 nitishas over 12 years ago

Try setting nullable=true and verify if it is saving the objects as expected or not.
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0 Jin Pheh
Certified Associate Developer
over 12 years ago

Nullable=true was already set however setting the child object with 'Optional=TRUE' did give me a different error: (paraphrasing) Cannot set null childID in parent.childID.

It appears hibernate is trying to save the parent before the child object is flushed so there's no childID to save the relationship with. I cannot remove the 'NOT NULL' restraint on the column for integrity reasons so that's also not an option.
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0 nitishas over 12 years ago

Remove the NOT NULL constraints. Hibernate saves the Parent object first and then Child objects and then updates the association.
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0 erickp over 6 years ago in reply to Jin Pheh

Hi jpeh, did you ever figure out what the problem was and the solution?
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