fix: include experiment key on local-eval exposure events#93
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Local evaluation exposure events emit `metadata['experimentKey']` inside the metadata blob but never lift it onto a top-level event property. Custom reports keying off `[Experiment] Experiment Key` therefore see no value for customers using local evaluation. When `variant.metadata['experimentKey']` is present, set `event_properties['[Experiment] Experiment Key']`. Mirrors the equivalent fix in the Node SDK (amplitude/experiment-node-server#83). Co-Authored-By: Claude Opus 4.7 <[email protected]>
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## [1.10.1](v1.10.0...v1.10.1) (2026-05-08) ### Bug Fixes * include experiment key on local-eval exposure events ([#93](#93)) ([f821d35](f821d35)), closes [amplitude/experiment-node-server#83](amplitude/experiment-node-server#83)
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Summary
ExposureService.to_exposure_eventscarriedexperimentKeyonly inside themetadatablob — the top-level event property[Experiment] Experiment Keywas never set, so custom reports keying off it saw no value for local-eval customers.variant.metadata['experimentKey']is present, setevent_properties['[Experiment] Experiment Key']. Additive and backwards-compatible —metadata,[Experiment] Flag Key,[Experiment] Variant, user properties, andinsert_idare unchanged.Test plan
with_experiment_keyfixture toExposureServicespec. Asserts[Experiment] Experiment Keyequals'exp-1'for that flag and is absent for the others.bundle exec rspec spec/experiment/local/exposure/exposure_service_spec.rb— 3 examples, 0 failures.🤖 Generated with Claude Code
Note
Low Risk
Low risk, additive analytics change that only adds a new event property when
variant.metadata['experimentKey']is present and expands test coverage accordingly.Overview
Local-eval exposure events now copy
variant.metadata['experimentKey']into a dedicated top-level event property,[Experiment] Experiment Key, instead of leaving it only inside themetadatablob.Specs add a
with_experiment_keyfixture and assertions that this property is present only when provided, updating the expected event count.Reviewed by Cursor Bugbot for commit e3ac213. Bugbot is set up for automated code reviews on this repo. Configure here.