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Date: Mon, 15 Apr 2013 11:46:16 +0000 (UTC)
From: "Andrus Adamchik (JIRA)" <jira@apache.org>
To: commits@cayenne.apache.org
Message-ID: <JIRA.12642511.1366020785661.167073.1366026376172@arcas>
In-Reply-To: <JIRA.12642511.1366020785661@arcas>
References: <JIRA.12642511.1366020785661@arcas>
Subject: [jira] [Commented] (CAY-1807) Replace a Detached object  with new
 one on a relationship throws NPE
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    [ https://issues.apache.org/jira/browse/CAY-1807?page=3Dcom.atlassian.j=
ira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=3D136316=
66#comment-13631666 ]=20

Andrus Adamchik commented on CAY-1807:
--------------------------------------

Thanks for the JIra. May I ask for a few details:

1. Do you have a stack trace?
2. Was the detached object mentioned here NEW before it was deleted?
               =20
> Replace a Detached object  with new one on a relationship throws NPE
> --------------------------------------------------------------------
>
>                 Key: CAY-1807
>                 URL: https://issues.apache.org/jira/browse/CAY-1807
>             Project: Cayenne
>          Issue Type: Improvement
>          Components: Core Library
>    Affects Versions: 3.0.1
>            Reporter: Manuel S=C3=A1nchez
>            Priority: Minor
>
> In the following scenario:
> I deleted and persistent object (gets detached) which was used in a relat=
ionship
> I replaced it with a new one at the end of a relathionship
> Cayenne records an ArcDeletedOperation with the detached object involved =
and throws a NPE when commiting.
> I solved the problem by disconecting the detached object from the relatio=
nship (set to null) and then assigning the new one; in two steps
> Cayenne could check if its a detached object on that ArcDeletedOperation =
and say so instead of throwing a NPE, or not recording any action, .. somet=
hing more elegant than a NPE
> Thanks

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