dosubot[bot] commented on issue #42468: URL: https://github.com/apache/superset/issues/42468#issuecomment-5089988828
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I traced through the relevant frontend code and can confirm the architecture *is* designed to propagate datasource changes after an inline edit — but there's a gap that explains this bug. **What happens today when you save:** 1. `DatasourceModal.onConfirmSave` saves via PUT, then re-fetches the dataset with a GET, and passes the result to `onDatasourceSave` [[1]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/components/Datasource/DatasourceModal.tsx#L183-L204) 2. `DatasourceControl.onDatasourceSave` dispatches `actions.changeDatasource(datasource)` to update Redux state [[2]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/explore/components/controls/DatasourceControl/index.jsx#L189-L218) 3. `changeDatasource` dispatches `setDatasource` and `updateFormDataByDatasource` to propagate the change [[3]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/explore/actions/datasourcesActions.ts#L44-L55) 4. `ExploreViewContainer` → `ExploreChartPanel` → `Chart` receive the updated datasource via props [[4]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/explore/components/ExploreViewContainer/index.jsx#L760-L845) [[5]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/explore/components/ExploreChartPanel/index.jsx#L224-L257) **Where it breaks down:** Metric formatting (currency, d3format) is stored on the datasource object, not in chart form data [[6]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/datasets/schemas.py#L82-L93) [[7]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/connectors/sqla/models.py#L370-L404). The chart renders using `column_formats` from the datasource payload [[8]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset/datasets/api.py#L187-L199). The most likely root causes are: - **`Chart` is a `PureComponent`** that uses shallow prop comparison [[9]](https://github.com/apache/superset/blob/829e4d92d91ceae4b43b1ed3b063ffe45377799c/superset-frontend/src/components/Chart/Chart.tsx#L48-L86). If the datasource object reference isn't treated as "new" by React's shallow diff (e.g., nested metric properties changed but the top-level structure looks similar), the chart won't re-render. - **The chart may not re-run its query** after a datasource-only change. Even if the datasource prop updates, the chart could be displaying results formatted with stale metadata from a previous query execution — a query re-run (or at minimum a re-format pass) is needed to pick up the new currency. **Potential fix approaches:** 1. In `DatasourceControl.onDatasourceSave`, explicitly trigger a chart query re-run after updating the datasource, so the chart re-renders with fresh formatting metadata 2. Ensure the datasource object from the modal is a distinctly new reference (e.g., deep clone) so React's shallow comparison detects the change 3. Have the chart rendering code reactively read formatting metadata from the datasource prop on every render rather than caching it on initial mount This is a frontend state propagation issue — the backend save works fine, but the chart preview doesn't pick up the updated formatting metadata without a full page refresh. <!-- Dosu Comment Footer --> *To reply, just mention [@dosu](<https://go.dosu.dev/dosubot?utm_source=github&utm_medium=bot-comment&utm_campaign=github-comment-footer-20260415&utm_content=reply-with-mention&utm_term=apache%2Fsuperset>).* --- Docs are dead. 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