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https://issues.apache.org/jira/browse/ISIS-1396?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dan Haywood closed ISIS-1396.
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> Some elements on an entity page can be rendered against stale data.
> -------------------------------------------------------------------
>
> Key: ISIS-1396
> URL: https://issues.apache.org/jira/browse/ISIS-1396
> Project: Isis
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.12.1
> Reporter: Dan Haywood
> Assignee: Dan Haywood
> Priority: Minor
> Fix For: 1.12.2
>
>
> In the contactapp (github.com/incodehq/contactapp), if edit a ContactGroup,
> then the Country title/icon are shown as null. This seems to be because they
> are being rendered against a stale version of the ContactGroup, ie after the
> JDO transaction has completed.
> Two different fixes.
> The first would seem to be to move the stuff that builds the EntityPage
> component hierarchy out of the EntityPage constructor and into the
> EntityPage's onBeforeRender() method.
> This works, but does solve the underlying issue. Talking with martin-g, he
> says this ought not to be necessary and pointed to a possible issue with the
> EntityModel (impl of LoadableDetachableModel).
> Further investigation shows that this is indeed where the issue is.
> EntityModel holds a lazily-populated cache of ScalarModels, keyed by
> property(Id). This is not cleared down on detach, meaning that a subsequent
> rendering of the property containing the reference to the country is using a
> stale ObjectAdapter (never detached) that refers to a pojo that was reset at
> the end of the preceding transaction.
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