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https://issues.apache.org/jira/browse/OPENJPA-2979?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maxim Solodovnik resolved OPENJPA-2979.
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Assignee: Richard Zowalla
Resolution: Fixed
> getReference(entity) fails on composite ids
> -------------------------------------------
>
> Key: OPENJPA-2979
> URL: https://issues.apache.org/jira/browse/OPENJPA-2979
> Project: OpenJPA
> Issue Type: Sub-task
> Components: jpa
> Affects Versions: 4.2.0
> Reporter: Maxim Solodovnik
> Assignee: Richard Zowalla
> Priority: Major
> Fix For: 4.2.0
>
>
> Discussion thread:
> https://github.com/apache/openjpa/pull/144#discussion_r3683004886
> **(medium)** `getReference(T entity)` only extracts the PK when
> `pkFields.length == 1`; for composite/IdClass/EmbeddedId entities `pk` stays
> null and the call fails downstream with a misleading "null pk"
> IllegalArgumentException. Also `entity.getClass()` (line 2657) may be a
> runtime subclass without direct metadata. Could composite ids be supported
> via `broker.getObjectId`, or at least fail with an explicit "composite id not
> supported" message?
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