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https://issues.apache.org/jira/browse/CAY-2369?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16189421#comment-16189421
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ASF GitHub Bot commented on CAY-2369:
-------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/cayenne/pull/243
> Compatibility issue with field-based data objects
> -------------------------------------------------
>
> Key: CAY-2369
> URL: https://issues.apache.org/jira/browse/CAY-2369
> Project: Cayenne
> Issue Type: Bug
> Affects Versions: 4.1.M1
> Reporter: Nikita Timofeev
> Assignee: Nikita Timofeev
> Labels: pull-request-available
> Fix For: 4.1.M1
>
>
> This one is from
> [dev@list|https://lists.apache.org/thread.html/72ba8d1c42fd9064652e7ff04647383e1777e1326a0ceeffaedfe87c@%3Cdev.cayenne.apache.org%3E].
> Data inserted in _4.0_ can't be updated in _4.1_ if optimistic locking for
> nullable attribute mapped on java primitive type is used. This is because
> version _4.1_ use field-based data objects that store primitive as primitive,
> thus there can't be _nulls_.
> Can be solved by modifying *cgen* templates to use boxed type internally for
> nullable attributes.
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