BigInt is not supported for output validation

[reteps]

I have code with the following output validator:

.output(z.array(z.bigint()))

Which gives me a "500 Internal Server Error".

However, using,

.output(z.array(z.number()))

Works fine.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[reteps]

not completed

[jlalmes]

Hi @reteps, can you share the full error & possibly a reproduction? Is this related to this issue? 👉 #275

[KATT]

BigInt isn't a JSON-thing, sounds weird that an OpenAPI compat API would support it.

If anything I'd do something like this in the output:

type BigIntString = string & z.BRAND<'BigInt'>;
z.bigint().transform(v => v.toString() as BigIntString);

[testerez]

I have a similar requirement. Using transform in the output zod schema works pretty well.
Unfortunately the generated openapi document indicates the wrong type in response.

Here is what I get:

"amount": {
  "type": "integer",
  "format": "int64"
}

Edit: Here is a potential solution to fix the openapi document response definition: #439