I just found the vega-lite block today and am trying to get a stacked bar graph using 2 fields. I stumbled onto the fold example (Fold | Vega-Lite) and was able to convert it to stacked instead of columns… and it looks like exactly what I want inside the vega-lite editor. But inside airtable, it seems that it doesn’t like the return “key” and “value” from the fold command. Gives the error:

value is not a valid transform name, inline data name, or field name from the Table1 table:

Anyone know if I’m doing something wrong, if this is missing functionality in airtable, or a bug?

{

  "$schema": "https://vega.github.io/schema/vega-lite/v4.json",

  "title": "Table1",

  "width": "container",

  "height": "container",

  

  "transform":  {"fold": m"Field1","Field2"]}],

  "mark": "bar",

  "encoding": {

    "x": {

      "field": "NAME",

      "type": "nominal"

    },

    "y": {

      "type": "quantitative",

      "field": "value"

    },

    "color": {

      "field": "key", 

      "type": "nominal", 

      "scale": {"range": e"#c49712", "#999"]

      }

    }

  }

}

Edit- Add link to fold example