createDefaultValue does not use the default value in a $ref

[bjb568]

Describe the bug

With this schema:

const schema = {
  "$schema": "http://json-schema.org/draft-07/schema#",
  "definitions": {
    "mydef": {
      "type": "object",
      "properties": {
        "myprop": { "type": "string" }
      }
    }
  },
  "type": "object",
  "properties": {
    "example": {
      "$ref": "#/definitions/mydef",
      "default": { "myprop": "default" }
    }
  }
}

Expected behavior

createDefaultValue(schema.properties.example, schema) should return { myprop: "default" }.

Steps to reproduce the issue

createDefaultValue(schema.properties.example, schema) returns {}.

Screenshots

No response

Which Version of JSON Forms are you using?

v3.7.0

Package

Core

Additional context

No response

[sdirix]

In JSON Forms we implemented the $ref resolving behavior of JSON Schema draft-07 and previous in which $ref siblings are ignored. This has the nice property that we always resolve to a sub-schema of the actual schema.

Supporting "overrides" is a larger feature which needs a proper design to avoid tanking performance. We'll likely not implement this in the near future ourselves. If you or anyone else in the community is interested to contribute this feature, then feel free to comment.