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From Jan Schaumlöffel (JIRA) <>
Subject [jira] Closed: (CAY-1520) Deleting Objects with Flattened Read-Only Relationships
Date Mon, 06 Dec 2010 11:21:12 GMT


Jan Schaumlöffel closed CAY-1520.

    Resolution: Invalid

Can work around this after inspecting the code, it is not really an issue anyway.

The documentation recommends setting the delete rule to something different from the default
"no action" and states that "nullify" does not do anything if there is no reverse relationship.
Setting anything but "no action" for a read-only relationship causes this issue.

Might be a good idea to disallow anything but "no action" for read-only relationships in the

> Deleting Objects with Flattened Read-Only Relationships
> -------------------------------------------------------
>                 Key: CAY-1520
>                 URL:
>             Project: Cayenne
>          Issue Type: Bug
>    Affects Versions: 3.0.1
>         Environment: multiple
>            Reporter: Jan Schaumlöffel
> When deleting an object with a flattened read-only relationship an exception is thrown:
> Caused by: org.apache.cayenne.CayenneRuntimeException: [v.3.0.1 Sep 06 2010 15:09:38]
Cannot unset the read-only flattened relationship runtimeRelationship0
> 	at org.apache.cayenne.access.DataDomainIndirectDiffBuilder.arcDeleted(
> 	at org.apache.cayenne.access.ObjectDiff$ArcOperation.apply(
> 	at org.apache.cayenne.graph.CompoundDiff.apply(
> 	at org.apache.cayenne.access.ObjectStoreGraphDiff.apply(
> 	at org.apache.cayenne.access.DataDomainIndirectDiffBuilder.processIndirectChanges(
> 	at org.apache.cayenne.access.DataDomainFlushAction.preprocess(
> 	at org.apache.cayenne.access.DataDomainFlushAction.flush(
> 	at org.apache.cayenne.access.DataDomain.onSyncFlush(
> 	at org.apache.cayenne.access.DataDomain$2.transform(
> 	at org.apache.cayenne.access.DataDomain.runInTransaction(
> 	at org.apache.cayenne.access.DataDomain.onSync(
> 	at org.apache.cayenne.access.DataContext.flushToParent(
> 	at org.apache.cayenne.access.DataContext.commitChanges(
> ...
> It might be the same issue as CAY-784, but I haven't looked at the code yet.

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