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https://issues.apache.org/jira/browse/ISIS-1317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dan Haywood resolved ISIS-1317.
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Resolution: Fixed
> Allow single domain object class to be invalidated through a mixin.
> -------------------------------------------------------------------
>
> Key: ISIS-1317
> URL: https://issues.apache.org/jira/browse/ISIS-1317
> Project: Isis
> Issue Type: New Feature
> Components: Core
> Affects Versions: 1.11.1
> Reporter: Dan Haywood
> Assignee: Dan Haywood
> Priority: Minor
> Fix For: 1.12.0
>
>
> This feature is useful because the new layout support (ISIS-993) - because of
> the way it pushes derives facets from the grid layout - can sometimes leave
> "stale" metadata if the grid is changed.
> For example, if an action is moved from a fieldset to some other area such as
> a column, then the action will appear more than once. That is because the
> action in its original location causes facets to be derived on the
> corresponding ObjectAction, and these aren't removed. Meanwhile, when the
> column to which the action layout is moved is rendered, it doesn't use
> facets, simply renders what's defined directly the grid.
> In the grander scheme of things this sort of thing isn't that big a deal, but
> it would be nice to invalidate the Isis metamodel (ObjectSpecification) from
> within the UI to get to a "clean slate".
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