Retrieve duplicate search results using the TrimDuplicatesIncludeId property - CollapseSpecification set to false doesn't work.

[AJIXuMuK]

The documentation says:

Use TrimDuplicatesIncludeId to retrieve the duplicates of a document when TrimDuplicates is true and TrimDuplicatesOnProperty or CollapseSpecification is set to false.

It stopped working in SharePoint Online.
Now, you should use CollapseSpecification='DocumentSignature: 1' to make it work.

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Document Details

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• ID: ec8602f3-35d6-27d4-cbb9-c4e5e25581a2
• Version Independent ID: d6db37b2-d279-9373-a2fa-a747a6ef0dc4
• Content: Customizing search results in SharePoint
• Content Source: docs/general-development/customizing-search-results-in-sharepoint.md
• Product: sharepoint
• Technology: sharepoint-framework
• GitHub Login: @spdevdocs
• Microsoft Alias: spdevdocs

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[andrewconnell]

@wobba Can you chime on on this? Are the docs incorrect and should be updated? If so, is this a unique setting in SPO vs. SP on-prem?

[wobba]

@karolikl And idea if there has been a change here? Docs state you can use TrimDuplicatesOnProperty for backwards compat.

@AJIXuMuK I would change to collapsespec anyways, which has been the recommended approach for years.

[AJIXuMuK]

@wobba just to clarify: CollapseSpecification = 'DocumentSignature: 1' is the recommended approach?

[wobba]

Depends what you want to achieve. If you want all duplicates for a specific item I do not expect CollapseSpecification='DocumentSignature: 1' to work as that will return one doc per signature.

And duplicate trimming on the default signature is also "evil", and we don't use in OOB Microsoft Search.

Can you clarify the issue a bit more?

I think perhaps the text "TrimDuplicatesOnProperty or CollapseSpecification is set to false." is wrong and should say "not set" instead of "false". Agree that that is the "bug"?

[AJIXuMuK]

@wobba the use case is get duplicates for a single document, yes.

For that I was using CollapseSpecification=false. And that worked. But stopped working in SPO probably few weeks ago (can't tell the exact timeframe).
After trying different combinations, setting CollapseSpecification='DocumentSignature: 1' seems to work.
So, instead of

TrimDuplicatesIncludeId = <id>
CollapseSpecification = false

I have

TrimDuplicatesIncludeId = <id>
CollapseSpecification = 'DocumentSignature: 1'

If I leave CollapseSpecification unset, it just returns the whole result set, without TrimDuplicatesIncludeId filtering.

So, I would say, CollapseSpecification = false should be changed to CollapseSpecification='DocumentSignature: 1' in the docs.

Let me know if there is other approach I could use.

[wobba]

Afaik CollapseSpecification should never have a value of "false". I'll take a pass at proposing the proper change to the docs once I get it working. When I specify TrimDuplicates=true and trimduplicatesincludeid=<id> I would expect to get all duplicated + original of that one file.

Seems the setting to provide an id has no effect at all.

CollapseSpecification='DocumentSignature:1' is the same as setting TrimDuplicates=true. Keep one item when the signature matches. trimduplicatesincludeid is about getting all the duplicates.

I tried in classic to enable Show View Duplicates link but cannot see the link showing, so need to investigate a bit more.

[puthurr]

Any update on this ?

[neelammourya]

@wobba When I specify TrimDuplicates=true and trimduplicatesincludeid=id I would expect to get all duplicated + original of that one file, but this is not happening, search result has no impact of trimduplicatesincludeid=id.
I also tried providing CollapseSpecification='DocumentSignature:1' together with the above 2 properties but it has NO effects.

I don't see any update of this bug since 1 year. Is this bug is still not resolved?