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But when trying to extract the transformed data it errors:
chart.transformed_data()
ValueError: Pre-transform error: Requested variable (Variable { name: "source_0", namespace: Data }, [])
requires transforms or signal expressions that are not yet supported
When looking to the spec, I'm not sure which transform is being utilised that is not yet supported.
The text was updated successfully, but these errors were encountered:
jonmmease
changed the title
cannot extract data, ValueError: Pre-transform error
Support format expression function
Oct 25, 2023
The issue is that the format expression function isn't implemented yet. I have an old Rust implementation of the Vega format function that I developed a while back for another project. I'll see if I can port that over to VegaFusion. Although, it may also be worth adding a special case for format(value, "") that just transforms this into toString(value), as this will be easier to support across SQL backends.
Also cross reference #336 for better error messages when something isn't supported.
The following spec renders fine:
But when trying to extract the transformed data it errors:
When looking to the spec, I'm not sure which transform is being utilised that is not yet supported.
The text was updated successfully, but these errors were encountered: