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From Kevin Sutter <kwsut...@gmail.com>
Subject Re: behavior change from 2.1.0 to 2.2.0 on persist
Date Mon, 02 Jun 2014 14:11:17 GMT
Hi Marc,
Sorry for the troubles.  Technically, it looks like you were lucky and
coding to a bug in the OpenJPA code.  Since you just created this
CustomerType, we have to assume that it's unmanaged.  And, we can't
automatically cascade the persist operation to this unmanaged entity.  And,
in your particular case, we wouldn't want to persist this entity since it
already exists.

Just to be clear, you don't want this CustomerType to be persisted, right?
You are just creating this to satisfy the relationship from Person, right?

A couple of ideas come to mind...

1)  Can you do an em.find() operation on your CustomerType?  I realize this
is an extra SQL, but then this CustomerType would be managed and satisfy
the requirement.

2)  Have you tried using em.merge(p) instead of em.persist(p)?  The merge
should do either the update or insert based on the state of the object.
When we get to the CustomerType, we might have to do the extra SQL to
determine if it exists already, but then we should be okay.  This JIRA [1]
from the 2.2.0 Release Notes [2] makes me think this might work...

Maybe somebody else has some ideas on how to get around this scenario.

[1]  https://issues.apache.org/jira/browse/OPENJPA-1896
[2]
http://openjpa.apache.org/builds/2.2.0/apache-openjpa/RELEASE-NOTES.html




On Mon, Jun 2, 2014 at 7:48 AM, Marc Logemann <marc.logemann@gmail.com>
wrote:

> Hey,
>
> we recently switched to 2.2.0 (cant go higher because we use Java8) and we
> found a change in behavior.
>
> Asumme we created a new Entity which looks like this:
>
> Person.java
> ------------------
> int oid
> String name
> CustomerType adress
>
>
> we created the object like so:
>
> Person p = new Person();
> p.setName("foo);
>
> CustomerType ct = new CustomerType();
> ct.setOid(1); // THIS OID already exists and we want to map the existant
> object to Person
>
> p.setCustomerType(ct);
>
> persist(p);
>
>
> =====
>
> In 2.1.0 OpemJPA knew that there is a CustomerType in the DB with this oid
> and loads it automaticly and the child object is "managed". With 2.2.0 this
> is no longer the case and we get a "Unmanaged bla bla bla Exception". We
> relied on that behavior heavily and the rewrite is a tough for all areas.
> Is there some kind of config setting where i can set the "old behavior". Or
> was this old behavior a bug? ;-)
>
> Thanks for hints.
>
> Marc
>

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