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https://issues.apache.org/jira/browse/CAY-2848?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17823781#comment-17823781
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Jadon Hansell commented on CAY-2848:
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I believe this was an existing error before CAY-2838, I've begun migrating
columns back to the child DbEntities after that ticket to test and ran into
this.
> Vertical Inheritance: Updating one-to-many with inverse nullifies other
> columns.
> --------------------------------------------------------------------------------
>
> Key: CAY-2848
> URL: https://issues.apache.org/jira/browse/CAY-2848
> Project: Cayenne
> Issue Type: Bug
> Reporter: Jadon Hansell
> Priority: Major
> Attachments: update-flattened-relationship-nullify-other-columns.patch
>
>
> When there is a one-to-many relationship on the child DbEntity of a vertical
> inheritance scenario, giving it an inverse fails when the relationship is
> updated to anything non-null.
> An update query is issued that contains the PK of the child row and the new
> ID for the relationship, but sets every other column to null. I've included a
> breaking test as a patch in 4.2-STABLE.
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