[8.19] [Lens] Forward secondary prefix correctly when state value is an empty string (None option) (#228183)#228423
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kibanamachine merged 2 commits intoelastic:8.19from Jul 22, 2025
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…y string (`None` option) (elastic#228183) Closes elastic#227281 ## Summary When going from state to expression, the secondaryPrefix value wasn't forwarded correctly when the secondaryPrefix state value was an empty string (the empty string is set in the state when the Prefix "None" option is selected in settings). It was forwarded as `undefined`, causing showing the column name as the prefix on: https://github.com/elastic/kibana/blob/2928bdf1cb5f8fd648c6a46a52ae3f96b4b01a70/src/platform/plugins/shared/chart_expressions/expression_metric/public/components/secondary_metric.tsx#L255 #### After: https://github.com/user-attachments/assets/1a104f9e-bf78-4acc-aca5-a3866c80d03f ### Checklist - [x] [Unit or functional tests](https://www.elastic.co/guide/en/kibana/master/development-tests.html) were updated or added to match the most common scenarios - [x] The PR description includes the appropriate Release Notes section, and the correct `release_note:*` label is applied per the [guidelines](https://www.elastic.co/guide/en/kibana/master/contributing.html#kibana-release-notes-process) - [x] Review the [backport guidelines](https://docs.google.com/document/d/1VyN5k91e5OVumlc0Gb9RPa3h1ewuPE705nRtioPiTvY/edit?usp=sharing) and apply applicable `backport:*` labels. (cherry picked from commit d1846d3)
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Backport
This will backport the following commits from
mainto8.19:Noneoption) (#228183)Questions ?
Please refer to the Backport tool documentation