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From "Uri Boness" <>
Subject merge with new instances
Date Sun, 15 Jul 2007 16:54:36 GMT

the entityManager.merge() doesn't seem to work properly (at least according
to the spec). Let's say I have a Person record in the database with id = 1.
According to the spec, when merging a new instance of a person with an
existing id (in this case id = 1), the entityManager should figure out that
this id already exists in the database and try to update the existing
record. Currently, merge tries to add a new record to the database, an
operation that obviously fails due to primary key constraint violation. Any
idea why this is happening? do I need to set up certain properties to get it
working correctly (note: I ran the same code under hibernate and
toplink-essentials and in both cases it works fine).


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