Fix arrow type inference error (fall back to string)

vega / vegafusion

Serverside scaling for Vega and Altair visualizations

https://vegafusion.io

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Fix arrow type inference error (fall back to string) #473

Closed jonmmease closed 3 months ago

jonmmease commented 3 months ago

Closes #472

This PR updates the PandasDatasource to handle pandas columns with mixed types that trigger a pyarrow error. In this case we fall back to reporting the column type as string, and then convert the column to string in fetch if it's requested.