[Store] Fix CacheStore and InMemoryStore to return similarity scores #856
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The DistanceCalculator was calculating distances but not returning them in the VectorDocument results. This meant queries returned documents without score information, making it impossible to determine result relevance. This fix creates new VectorDocument instances with the calculated distance as the score property, matching the pattern used by other stores (Redis, MariaDb, Postgres).
camilleislasse requested review from Nyholm, OskarStark and chr-hertel as code owners 
carsonbot added Bug 
OskarStark reviewed Nov 11, 2025
| | ||
| return array_map( | ||
| static fn (array $embedding): VectorDocument => $embedding['document'], | ||
| static fn (array $embedding): VectorDocument => new VectorDocument( |
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Can we implement a withScore method to VectorDocument instead?
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Description
The
DistanceCalculatorwas calculating distances but not returning them in theVectorDocumentresults. This meant queries toCacheStoreandInMemoryStorereturneddocuments without score information, making it impossible to determine result relevance.
Changes
This fix creates new
VectorDocumentinstances with the calculated distance as thescoreproperty, matching the pattern used by other stores (Redis, MariaDb, Postgres).