Enable $data reference usage for AJV validation

Prerequisites

• I have read the documentation;

Description

Looking at the docs for AJV, it enables us to write validation rules using $data reference to an existing schema field’s value, like

var ajv = new Ajv({$data: true});

var schema = {
  "properties": {
    "smaller": {
      "type": "number",
      "maximum": { "$data": "1/larger" }
    },
    "larger": { "type": "number" }
  }
};

var validData = {
  smaller: 5,
  larger: 7
};

ajv.validate(schema, validData); // true

But the default setup for AJV in RJSF does not enable $data=true

Is this an opinionated design choice for some reason or we can somehow enable it. I couldn’t find documentation that lets us override the AJV setup.

Having the $data reference will enable us to write more complex schema based validations.

Is this something you will be open to enabling or letting users override this option somehow?

Thanks

[epicfaace]

Actually, given that $data is not yet part of the JSON Schema spec (it’s just a proposal as of now – see https://github.com/json-schema-org/json-schema-spec/issues/51), it might be better to wait until we see if and/or how it is incorporated into the JSON schema spec before implementing it in rjsf.

[zeddotes]

Hey, I’ve created a fix for this waiting to be approved by the team: https://github.com/rjsf-team/react-jsonschema-form/pull/1668