Unable to generate uischema for `null` type

[buremba]

Describe the bug

When the JSON Schema has the following null type, uischema can't get generated and it fails with the following error:

> Generate.uiSchema(schema)
Error: Unknown type: {"type":"null"}

type: object
properties:
  examplefield:
     type: null

Expected behavior

I expect the fields with a null type (and type not defined) to be rendered in the form in a custom renderer or with a fallback component.

Steps to reproduce the issue

Skip defining a schema and uischema and try to render the following data:

<JsonForms data={{examplefield: null}}

Note that Generate.jsonSchema generates the schema above.

Screenshots

No response

In which browser are you experiencing the issue?

Google Chrome

Which Version of JSON Forms are you using?

v.3.1.0

Framework

Core, React

RendererSet

Material

Additional context

No response

[sdirix]

Hi @buremba,

Thanks for the report! You are right, we should at least not throw an error. The best guess would probably to generate a JSON Schema which defines examplefield as type: "null".

Do you want to contribute this improvement? The generator can be found here.

[gnillev]

Any update on this? I can see there was some work done on a fix back in december :)