doesn't work when $ref has an id

[andreineculau]

this should work

{
  "id": "foo",
  "type": "object",
  "properties": {
    "foo": {
      "$ref": "foo"
    }
  },
  "additionalProperties": false
}

but it doesn't - json-schema-to-typescript will try to read a file called "foo", despite having a reference to a schema with id "foo"

[andreineculau]

apparently this is a lingering issue APIDevTools/json-schema-ref-parser#22 (comment)

[bcherny]

Hi @andreineculau. That is not a valid usage of $ref. What you want is:

{
  "id": "foo",
  "type": "object",
  "properties": {
    "foo": {
      "$ref": "#"
    }
  },
  "additionalProperties": false
}

The issue is unrelated to the one you linked, and is simply how the JSONPointer and JSONSchema specs define $refs. If a $ref doesn't begin with #, it indicates a pointer to an external file (rather than a pointer to somewhere else in the current schema). See the ref.abc tests here, and see sections 8-9 in the JSONSchema spec here.

[andreineculau]

Well, fwiw that was not the case for JSON Schema v4, and that's what I have specified in my local schema's $schema value (missing from the example in this issue).

https://tools.ietf.org/html/draft-zyp-json-schema-04#section-7.2.3

[bcherny]

Read more carefully:

Implementations MUST support canonical dereferencing, and MAY support inline dereferencing.

Don't rely on inline dereferencing.