Unexpected error when property schemas are boolean

[StefanTerdell]

openapi-typescript version

7.6.1

Node.js version

20.5.1

OS + version

macOS 15.3.1

Description

If an object property is defined with a boolean schema transformation will fail. There is precedent in the codebase to handle these as unknown and never respectively (see additionalProperties).

Reproduction

See the test in the linked PR.

Expected result

See the test in the linked PR.

Required

• My OpenAPI schema is valid and passes the Redocly validator (npx @redocly/cli@latest lint)

Extra

• I’m willing to open a PR (see CONTRIBUTING.md)

[drwpow]

Thanks for the issue and PR. We’d be willing to accept it given there’s a precedent here. Is there a link to the specification where this is valid, either according to any OpenAPI 3.x version, or JSONSchema? This is the first time I’ve seen this syntax before

[StefanTerdell]

Sure! A boolean is always a valid JSON schema in versions later than draft 4 regardless of keyword. See the type keyword in either of these meta schemas:
https://json-schema.org/draft/2020-12/schema
https://json-schema.org/draft/2019-09/schema
https://json-schema.org/draft-07/schema
https://json-schema.org/draft-06/schema

Draft 4 (which OpenAPI <=3.0 was based on) only accepts them for specific keywords:
https://json-schema.org/draft-04/schema

It's my understanding that OpenAPI >=3.1 supports draft 2020 though.

Thanks!

[drwpow]

Thanks for the reference! That works for me. This library doesn’t require a specific JSONSchema version; as long as a JSONSchema feature doesn’t conflict with any existing behavior it’s a simple add