JTD values form accepts any value

[VirtuaBoza]

What version of Ajv are you using? Does the issue happen if you use the latest version?

8.11.0 (latest at time of writing)

Ajv options object

undefined

JSON Type Definition

{
  values: {}
}

Sample data

undefined

Your code

import Ajv from "ajv/dist/jtd";

const ajv = new Ajv();
console.log(ajv.validate({ values: {} }, undefined)); // true, expected false
console.log(ajv.validate({ values: {} }, null)); // true, expected false
console.log(ajv.validate({ values: {} }, 1)); // true, expected false
console.log(ajv.validate({ values: {} }, "foo")); // true, expected false

Validation result, data AFTER validation, error messages

true

What results did you expect?

I expected false. Unless I misunderstand the documentation, { values: {} } is equivalent to Record<string, any>, but it appears to be treated as any.

Are you going to resolve the issue?

First I'm interested to know if I'm mistaken. I haven't taken a look at the source code to know if I might be able to resolve it myself.

My workaround for the moment is to replace { values: {} } with { optionalProperties: { foo: {} }, additionalProperties: true }.

[epoberezkin]

This is indeed a bug - it happens with an empty "values" form.

As a workaround, you should be using "properties" form without properties.