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feat(mongodb-constants): add $rankFusion stage for 8.1+ COMPASS-9429 #545

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merged 2 commits into from
Jun 20, 2025
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feat(mongodb-constants): add $rankFusion stage for 8.1+ COMPASS-9429 #545

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8e8e1b0
feat(mongodb-constants): add stage for 8.1+ COMPASS-9429
Anemy Jun 13, 2025
0b1472a
fixup: snippet numbering
Anemy Jun 18, 2025
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42 changes: 42 additions & 0 deletions packages/mongodb-constants/src/stage-operators.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -749,6 +749,48 @@ const STAGE_OPERATORS = [
`,
snippet: `{
\${1:specification(s)}
}`,
},
{
name: '$rankFusion',
value: '$rankFusion',
label: '$rankFusion',
outputStage: false,
fullScan: false,
firstStage: false,
score: 1,
env: [ATLAS],
meta: 'stage',
version: '8.1.0',
apiVersions: [],
namespaces: [COLLECTION],
description:
'Combines multiple pipelines using reciprocal rank fusion to create hybrid search results.',
comment: `/**
* input.pipelines: Required. Map from name to input pipeline. Each pipeline must be a Ranked Selection Pipeline operating on the same collection. Minimum of one pipeline.
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Might suggest linking here https://deploy-preview-11066--docs-mongodb-internal.netlify.app/reference/operator/aggregation/rankFusion/#selection-pipeline when the docs publish on 6/18

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@Anemy Anemy Jun 16, 2025 •
edited
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We don't provide explicit links inside of the comment for any of the other stages, so I would prefer we keep that pattern if we can. We link to the stage's documentation in the aggregation builder, so folks can find it there:
Screenshot 2025-06-16 at 4 41 39 PM
Is that link enough? If we feel strongly we can change it.

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that works!

* combination.weights: Optional. Map from pipeline name to numbers (non-negative). If unspecified, default weight is 1 for each pipeline.
* scoreDetails: Optional. Default false. Set to true to include detailed scoring information in {$meta: "scoreDetails"} for debugging and tuning.
*/
`,
snippet: `{
input: {
pipelines: {
\${1:searchPipeline}: [
{$search: {\${2:searchStage}}},
{$limit: \${3:limit}}
],
\${4:vectorPipeline}: [
{$vectorSearch: {\${5:vectorSearchStage}}}
]
}
},
combination: {
weights: {
\${6:searchPipeline}: \${7:number},
\${8:vectorPipeline}: \${9:number}
}
},
scoreDetails: \${10:false}
}`,
},
{
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