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andyjefferson avatar andyjefferson commented on July 19, 2024

I think I understand more now about why my proposed fix won't work

  • when a one-to-one relationship field is present in an entity some additional information is stored into the
    database i.e. a 'persistence id' by and for Datanucleus when persist is done.

The problem here for me is that some other application (non Datanucleus is storing the data and has no
knowledge of a persistenceId), I am just reading data already stored, effectively doing a read only one-to-one
based on the Id for the entity.

So I think a work around for me would be to simplify my entity, remove the @OnetoOne mapping,
possibly mark the field as @transient and then manually fetch the field for myself within my application.

It would be good if the Datanucleus API could work without storing its own persistence id into the database
and just rely on the annotation mappings to fetch the object data.

from datanucleus-cassandra.

andyjefferson avatar andyjefferson commented on July 19, 2024

NUCCASSANDRA-62.zip

from datanucleus-cassandra.

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