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https://issues.apache.org/jira/browse/CAY-2256?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15904609#comment-15904609
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ASF GitHub Bot commented on CAY-2256:
-------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/cayenne/pull/175
> Cannot Save/Insert an Object With null Flattened (complex) toOne Relationship
> -----------------------------------------------------------------------------
>
> Key: CAY-2256
> URL: https://issues.apache.org/jira/browse/CAY-2256
> Project: Cayenne
> Issue Type: Bug
> Components: Core Library
> Affects Versions: 4.0.M4
> Reporter: Matt Watson
> Assignee: Nikita Timofeev
> Labels: flattened, null, relationship, toOne
> Fix For: 4.0.M6
>
> Attachments: breaking-test.patch
>
>
> When using a Flattened complex join for a toOne Relationship... if you do not
> set the relationship the {{validateForSave}} on {{CayenneDataObject}}
> incorrectly attaches a {{ValidationFailure}} saying that the relationship is
> required.
> Prior to 4.0.M4 this worked correctly, but the commit fixing CAY-2146
> introduced this issue. More directly the line of code holding the IF
> statement below was updated to check the db.Rels.size().
> {code:title= CayenneDataObject.java|borderStyle=solid}
> if (dbRels.size() == 1 && relationship.isSourceIndependentFromTargetChange())
> {
> continue;
> }
> {code}
> While putting this code back makes the test for this issue pass, it obviously
> makes the test for CAY-2146 FAIL, so I'm not suggesting to put it back, but
> just pointing it out in case it helps better understand this issue.
> (see attached breaking-test.patch)
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