Dan Haywood created ISIS-1226:
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Summary: Drop-down breadcrumbs broken.
Key: ISIS-1226
URL: https://issues.apache.org/jira/browse/ISIS-1226
Project: Isis
Issue Type: Bug
Components: Core
Affects Versions: 1.9.0
Reporter: Dan Haywood
Assignee: Dan Haywood
Priority: Minor
Fix For: 1.10.0
The BreadcrumbModel is held by the session (specifically, the
AuthenticatedWebSessionForIsis, subclass of a Wicket session class).
This holds a list of EntityModels.
The EntityModels are LoadableDetachable, which caches the underlying
ObjectAdapter in a transient field.
It seems that the model isn't being serialized/deserialized, and there is no
explicit detach, thus on the next request the EntityModel still holds the
ObjectAdapter (for the previous PersistenceSession) and which in turn holds the
pojo. From JDO/Datanucleus' perspective, this pojo is not persistent.
As per ISIS-1194 simplificaitons, we now delegate to the pojo to determine
whether it is persistent or not; and so JDO/DN reports that this pojo is NOT
persistent.
In turn this gives us a "" empty string for the oid str, and things then break.
~~~
The fix is to explicitly detach all the EntityModels of the BreadcrumbModel.
This can be done by hooking into the AuthenticatedWebSessionForIsis#detach()
hook.
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