[JIRA] Created: (CAY-715) NPE when deleting child temp objects

From: JIRA (Øyvind)
Date: Wed Dec 06 2006 - 03:19:04 EST

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NPE when deleting child temp objects
------------------------------------

         Key: CAY-715
         URL: http://issues.apache.org/cayenne/browse/CAY-715
     Project: Cayenne
        Type: Bug

Versions: 1.2 [STABLE]
Reporter: Øyvind Harboe

Perhaps Cayenne is not being used in the right fashion, but it is terribly difficult to translate from that NPE to my crime.

http://mail-archives.apache.org/mod_mbox/incubator-cayenne-user/200612.mbox/ajax/%3cc09652430612051354h4f568416s84d43b9f07a0b6a..ail.gmail.com%3e

- create child data context
- Create new record A
- Create a child record B.
- Delete child record B. NB! here B is not committed to the database yet.
- commit on child data context(which goes all the way to the root
datacontext) => NPE

I've recently burnt myself on delete rules and I'm wondering if this
is another incarnation of that problem.

A has a Cascade delete rule for B. B has a Nullify.

Cayenne 1.2.1

Caused by: java.lang.NullPointerException: Attempt to add null target
DataObject.
        at org.objectstyle.cayenne.CayenneDataObject.addToManyTarget(CayenneDataObject.java:298)
        at org.objectstyle.cayenne.access.ChildDiffLoader.arcCreated(ChildDiffLoader.java:146)
        at org.objectstyle.cayenne.access.ObjectDiff$ArcOperation.apply(ObjectDiff.java:408)
        at org.objectstyle.cayenne.graph.CompoundDiff.apply(CompoundDiff.java:133)
        at org.objectstyle.cayenne.access.ObjectStoreGraphDiff.apply(ObjectStoreGraphDiff.java:155)
        at org.objectstyle.cayenne.access.DataContext.onContextFlush(DataContext.java:1215)
        at org.objectstyle.cayenne.access.DataContext.onSync(DataContext.java:1192)
        at org.objectstyle.cayenne.access.DataContext.flushToParent(DataContext.java:1261)
        at org.objectstyle.cayenne.access.DataContext.commitChangesToParent(DataContext.java:1150)
        at com.zylin.payback.app.html.EditTreatment.submit(EditTreatment.java:209)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.apache.tapestry.listener.ListenerMap.invokeTargetMethod(ListenerMap.java:257)

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Next message: Michael Gentry: "Re: Re: Re: Re: Re: Re: Password Encoding"
Previous message: Andrus Adamchik: "Re: [VOTE] Graduate Cayenne to TLP status (pending board approval)"
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