Hi all, I'm currently working on a custom extractor. To support schema discovery I'm adding different Property as ArrayType(StringType()) to PropertiesList. This results for a column _array_column_ in a schema like this:

"schema": {
  "properties": {
    "array_column": {
      "items": {
        "type": [
          "string"
        ]
      },
      "type": [
        "array",
        "null"
      ]
    },
    ...

The incoming data can also contain null values like this:

{
...
"array_column": [null, null],
...
}

Is there a way to add "null" to the allowed types of the array_column while using ArrayType(StringType()) without creating any custom types?

"schema": {
  "properties": {
    "array_column": {
      "items": {
        "type": [
          "string",
          "null"
        ]
      },
      "type": [
        "array",
        "null"
      ]
    },
    ...

Thank you for your help!

Not supported at the moment unfortunately. The best workaround I can think of is to use `CustomType`:

ArrayType(CustomType({"type": ["string", "null"]}))

That's what I thought. Thank you very much for your answer, Edgar 🙂