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https://issues.apache.org/jira/browse/CAY-1520?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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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 modeler.
> Deleting Objects with Flattened Read-Only Relationships
> -------------------------------------------------------
>
> Key: CAY-1520
> URL: https://issues.apache.org/jira/browse/CAY-1520
> 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(DataDomainIndirectDiffBuilder.java:123)
> at
> org.apache.cayenne.access.ObjectDiff$ArcOperation.apply(ObjectDiff.java:440)
> at org.apache.cayenne.graph.CompoundDiff.apply(CompoundDiff.java:91)
> at
> org.apache.cayenne.access.ObjectStoreGraphDiff.apply(ObjectStoreGraphDiff.java:134)
> at
> org.apache.cayenne.access.DataDomainIndirectDiffBuilder.processIndirectChanges(DataDomainIndirectDiffBuilder.java:59)
> at
> org.apache.cayenne.access.DataDomainFlushAction.preprocess(DataDomainFlushAction.java:180)
> at
> org.apache.cayenne.access.DataDomainFlushAction.flush(DataDomainFlushAction.java:134)
> at org.apache.cayenne.access.DataDomain.onSyncFlush(DataDomain.java:824)
> at org.apache.cayenne.access.DataDomain$2.transform(DataDomain.java:791)
> at
> org.apache.cayenne.access.DataDomain.runInTransaction(DataDomain.java:850)
> at org.apache.cayenne.access.DataDomain.onSync(DataDomain.java:788)
> at
> org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:1106)
> at
> org.apache.cayenne.access.DataContext.commitChanges(DataContext.java:1045)
> ...
> It might be the same issue as CAY-784, but I haven't looked at the code yet.
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