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https://issues.apache.org/jira/browse/SLING-10645?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17411026#comment-17411026
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Bertrand Delacretaz commented on SLING-10645:
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I don't know much about the resource merger, but looking at the docs at
[https://sling.apache.org/documentation/bundles/resource-merger.html] the key
modes seem to be "override" and "merge".
In this case for multi-valued properties the default mode is apparently
"override", do you need more than a new "merge" option?
IIUC you're going for overriding or hiding individual values, which looks quite
brittle to me. If just adding a "merge" mode would work for your use cases that
might be easier to manage.
> Update Sling Resource Merger with handling for multi-valued properties
> ----------------------------------------------------------------------
>
> Key: SLING-10645
> URL: https://issues.apache.org/jira/browse/SLING-10645
> Project: Sling
> Issue Type: Improvement
> Components: ResourceResolver
> Affects Versions: Resource Merger 1.4.0
> Reporter: Henry Kuijpers
> Priority: Major
>
> Sling Resource Merger is able to handle properties, not individual property
> values.
> When setting up this node structure (with AEM's extraClientlibs property in
> TouchUI dialogs):
> + /libs/wcm/basicpage/cq:dialog@extraClientlibs=["a", "b", "c"]
> + /apps/website/components/page@sling:resourceSuperType="wcm/basicpage"
> + /apps/website/components/page/cq:dialog@extraClientlibs=["d", "e"]
> We want to make sure that the extraClientlibs property that is being read in
> website/components/page/cq:dialog will return ["a", "b", "c", "d", "e"].
> Currently, it will just return ["d", "e"], since the extraClientlibs-property
> is *overwritten*.
> It would be nice to add additional logic to allow more control over the
> inheritance of the values that are tied to a parent's
> extraClientlibs-property.
> Maybe we can come up with some additional properties that can function as
> instructions to the Resource Merger (next to the ones we already have), so
> that there can be more fine-grained control over the inheritance/removal of
> property values in multi-valued scenarios.
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