Zod string literal enums are generated in OpenAPI spec without a string type

[evrys]

Environment

orpc@1.13.5

Reproduction

ZodToJsonSchemaConverter result for the following does not include string type:

z.enum(["bug", "feedback"])

Describe the bug

With Stoplight rendering my spec, I see a lot of these:

I worked around it in my project like so:

const openApiGenerator = new OpenAPIGenerator({
  schemaConverters: [
    new ZodToJsonSchemaConverter({
      interceptors: [
        (options) => {
          // Workaround to make orpc correctly specify zod string
          // enums as strings in the OpenAPI spec (instead of "any")
          const [required, schema] = options.next();
          if (schema && "enum" in schema && !("type" in schema)) {
            return [required, { ...schema, type: "string" }];
          }
          return [required, schema];
        },
      ],
    }),
  ],
});

Additional context

No response

Logs

[unnoq]

This is expected oRPC behavior. It's more likely a Scalar issue, since there's no requirement that an enum must define a type.

The official OpenAPI documentation also includes examples where enum is defined without type, and JSON Schema does not require type for enum either.