feat(lapis): also allow multiple value in int, float and date filters (and concatenate them with or)

[fengelniederhammer]

resolves #1595

int, float, and date exact-match filters now accept an array of values, combining them with logical OR — the same behaviour already supported for string fields.

{ "age": [50, 51, 52] }
{ "qcValue": [0.95, 0.97, 0.8] }
{ "date": ["2021-05-08", "2021-01-20"] }

null is supported as an array element to filter for missing values. Range filters (*From/*To) are unchanged and still accept a single value only.

PR Checklist

• All necessary documentation has been adapted.
• All necessary changes are explained in the llms.txt.
• The implemented feature is covered by an appropriate test.

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Project	Deployment	Actions	Updated (UTC)
lapis	Ready	Preview, Comment	Apr 10, 2026 7:14am

[Copilot]

Pull request overview

Adds multi-value exact-match support (logical OR semantics) for int, float, and date metadata filters in LAPIS—bringing them in line with existing multi-value behavior for string filters—and updates docs/tests accordingly.

Changes:

• Extend int/float/date exact-match filters to accept multiple values and map them to an Or(...) SILO filter expression (including null as “is missing”).
• Update OpenAPI + template/docs + docs-site filter descriptions to reflect new multi-value capability.
• Add/adjust unit + e2e coverage for multi-value exact-match queries.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
lapis/src/main/kotlin/org/genspectrum/lapis/model/SiloFilterExpressionMapper.kt	Implements OR-combination for multi-value exact-match int/float/date filters (including null).
lapis/src/main/kotlin/org/genspectrum/lapis/openApi/OpenApiDocs.kt	Updates filter schemas so int/float/date exact-match filters accept either a scalar or an array.
lapis/src/main/resources/templates/llms.txt	Updates end-user docs to describe array support for date/int/float exact matches.
lapis/src/test/kotlin/org/genspectrum/lapis/model/SiloFilterExpressionMapperTest.kt	Adjusts/extends unit test expectations for OR-wrapped exact-match expressions and new multi-value cases.
lapis-e2e/test/aggregatedQueries/intEqualsMultiple.json	New e2e aggregated-query fixture validating multi-value int equals behavior.
lapis-e2e/test/aggregatedQueries/floatEqualsMultiple.json	New e2e aggregated-query fixture validating multi-value float equals behavior.
lapis-e2e/test/aggregatedQueries/dateEqualsMultiple.json	New e2e aggregated-query fixture validating multi-value date equals behavior.
lapis-e2e/test/aminoAcidSequence.spec.ts	Updates an assertion to match a changed SILO error message wording.
lapis-docs/src/components/FiltersTable/getFilters.tsx	Updates docs-site filter descriptions to mention array/OR semantics.

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[fengelniederhammer]

Unrelated to this PR, but SILO recently changed the error message in this case.

[fhennig]

ok

[fhennig]

LGTM, but the null documentation case seems worth attemting to fix.