dosubot[bot] commented on issue #36238: URL: https://github.com/apache/superset/issues/36238#issuecomment-3574239494
<!-- Answer --> Superset’s Sankey chart does treat 'source' and 'target' as two separate columns, but if a row has the same value for both, it creates a self-loop. The underlying ECharts library requires the data to form a Directed Acyclic Graph (DAG), so any self-loop (where source equals target) will cause the chart to fail to render—this is a technical limitation from ECharts, not something configurable in Superset itself[^1][^2]. Superset does not automatically filter or handle these cases, so you’ll need to preprocess your data to exclude rows where source and target are equal before visualizing with a Sankey chart. There aren’t any built-in chart types or plugins in Superset that support self-loops or cyclic data for Sankey diagrams. If you need to visualize such relationships, you’d need to consider a custom visualization plugin[^3]. If you want help with a SQL example or a data transformation to filter out self-loops, let me know! [^1]: [Sankey transformProps.ts code](https://github.com/apache/superset/blob/master/superset-frontend/plugins/plugin-chart-echarts/src/Sankey/transformProps.ts) [^2]: [Sankey chart control panel config](https://github.com/apache/superset/blob/master/superset-frontend/plugins/plugin-chart-echarts/src/Sankey/controlPanel.tsx) [^3]: [Custom visualization plugin PR](https://github.com/apache/superset/pull/36028) <!-- Dosu Comment Footer --> *To reply, just mention [@dosu](https://go.dosu.dev/dosubot).* --- <sup>How did I do? [Good](https://app.dosu.dev/response-feedback/69e0f760-5405-44e8-8e57-67ca94e1e1ff?feedback_type=great_response) | [Irrelevant](https://app.dosu.dev/response-feedback/69e0f760-5405-44e8-8e57-67ca94e1e1ff?feedback_type=irrelevant_answer) | [Incorrect](https://app.dosu.dev/response-feedback/69e0f760-5405-44e8-8e57-67ca94e1e1ff?feedback_type=incorrect_sources) | [Verbose](https://app.dosu.dev/response-feedback/69e0f760-5405-44e8-8e57-67ca94e1e1ff?feedback_type=too_verbose) | [Hallucination](https://app.dosu.dev/response-feedback/69e0f760-5405-44e8-8e57-67ca94e1e1ff?feedback_type=hallucination) | [Report 🐛](https://app.dosu.dev/response-feedback/69e0f760-5405-44e8-8e57-67ca94e1e1ff?feedback_type=bug_report) | [Other](https://app.dosu.dev/response-feedback/69e0f760-5405-44e8-8e57-67ca94e1e1ff?feedback_type=other)</sup> [](https://app.dosu.dev/a28d3c7e-a9d3-459e-9fb6-3a6f9ff4f357/ask?utm_source=github) [](https://cursor.com/link/prompt?text=Superset%E2%80%99s%20Sankey%20chart%20does%20treat%20%27source%27%20and%20%27target%27%20as%20two%20separate%20columns%2C%20but%20if%20a%20row%20has%20the%20same%20value%20for%20both%2C%20it%20creates%20a%20self-loop.%20The%20underlying%20ECharts%20library%20requires%20the%20data%20to%20form%20a%20Directed%20Acyclic%20Graph%20%28DAG%29%2C%20so%20any%20self-loop%20%28where%20source%20equals%20target%29%20will%20cause%20the%20chart%20to%20fail%20to%20render%E2%80%94this%20is%20a%20technical%20limitation%20from%20ECharts%2C%20not%20something%20configurable%20in%20Superset%20itself%5B%5E1%5D%5B%5E2%5D.%0A%0ASuperset%20does%20not%20automatically%20filter%20or%20handle%20these%20cases%2C%20so%20you%E2%80%99ll%20need%20to%20preprocess%20your%20data%20to%2 0exclude%20rows%20where%20source%20and%20target%20are%20equal%20before%20visualizing%20with%20a%20Sankey%20chart.%20There%20aren%E2%80%99t%20any%20built-in%20chart%20types%20or%20plugins%20in%20Superset%20that%20support%20self-loops%20or%20cyclic%20data%20for%20Sankey%20diagrams.%20If%20you%20need%20to%20visualize%20such%20relationships%2C%20you%E2%80%99d%20need%20to%20consider%20a%20custom%20visualization%20plugin%5B%5E3%5D.%0A%0AIf%20you%20want%20help%20with%20a%20SQL%20example%20or%20a%20data%20transformation%20to%20filter%20out%20self-loops%2C%20let%20me%20know%21%0A%0A%5B%5E1%5D%3A%20%5BSankey%20transformProps.ts%20code%5D%28https%3A//github.com/apache/superset/blob/master/superset-frontend/plugins/plugin-chart-echarts/src/Sankey/transformProps.ts%29%0A%5B%5E2%5D%3A%20%5BSankey%20chart%20control%20panel%20config%5D%28https%3A//github.com/apache/superset/blob/master/superset-frontend/plugins/plugin-chart-echarts/src/Sankey/controlPanel.tsx%29%0A%5B%5E3%5D%3A%20%5BCustom%20visual ization%20plugin%20PR%5D%28https%3A//github.com/apache/superset/pull/36028%29) [](https://go.dosu.dev/discord-bot) [](https://twitter.com/intent/tweet?text=%40dosu_ai%20helped%20me%20solve%20this%20issue!&url=https%3A//github.com/apache/superset/issues/36238) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
