Nullable type support for 'anyOf' fields with two values

[aringeri]

Prerequisites

• I have read the documentation

What theme are you using?

shadcn

What is your question?

Hello,

I have a specific use-case where my nullable types are represented with an anyOf but do not want to render them as a drop-down with two options (null, string).

For context, I am using FastAPI to generate an OpenAPI/JSONSchema specification for my backend API. Using FastAPI, Nullable/Optional properties are generated into JSONSchema as below:

"name": {
  "anyOf": [
    {
      "type": "string"
    },
    {
      "type": "null"
    }
  ],
  "title": "Name",
  "description": "A name of a user"
}

I understand that react-jsonschema-form is expecting nullable types to use an array (in order to render a single textbox) as below:

"name": {
  "type": [ "string", "null" ],
  "title": "Name",
  "description": "A name of a user"
}

Is there any way to configure react-jsonschema-form for the first case to render only a single text box? I see this as a specific case where there are only two options in an anyOf/oneOf property, and one of those options is null.

Any help would be appreciated!