Uncaught Error: A discriminator value for key could not be extracted from all schema options

[TitoSniberb]

Having this code:

const portfolioManagedInternalizationData = z
  .object({ serviceTypeId: z.number().int() })
  .passthrough();
const portfolioAdviceInternalizationData = z
  .object({
    serviceTypeId: z.number().int(),
    adviceTypeId: z.number().int(),
    bankingEntityId: z.union([z.number(), z.null()]).nullish(),
  })
  .passthrough();
const portfolioInternalizationData = z.discriminatedUnion("serviceTypeId", [
  portfolioManagedInternalizationData,
  portfolioAdviceInternalizationData,
]);

Why is it showing this error?
Uncaught Error: A discriminator value for key 'serviceTypeId' could not be extracted from all schema options

[JacobWeisenburger]

1. z.discriminatedUnion requires the use of a z.literal or z.enum. It doesn't work with z.number.
2. z.union([z.number(), z.null()]).nullish() is the same as z.number().nullish()

Try doing something like this:

const portfolioManagedInternalizationData = z.object( {
    serviceTypeId: z.literal( 'foo' )
} ).passthrough()

const portfolioAdviceInternalizationData = z.object( {
    serviceTypeId: z.enum( [ 'bar', 'baz' ] ),
    adviceTypeId: z.number().int(),
    bankingEntityId: z.number().nullish(),
} ).passthrough()

const portfolioInternalizationData = z.discriminatedUnion( 'serviceTypeId', [
    portfolioManagedInternalizationData,
    portfolioAdviceInternalizationData,
] )

console.log(
    portfolioInternalizationData.safeParse( {
        serviceTypeId: 'foo',
    } ).success
) // true

console.log(
    portfolioInternalizationData.safeParse( {
        serviceTypeId: 'bar',
        adviceTypeId: 1,
        bankingEntityId: null,
    } ).success
) // true

console.log(
    portfolioInternalizationData.safeParse( {
        serviceTypeId: 'baz',
        adviceTypeId: 2,
        bankingEntityId: 42,
    } ).success
) // true

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[arthurvanl]

Hi Jacob,

I am having a similar issue:

I do like to use other options that are not provided in the union. Those object must only have the required fields. I tried adding this

in the discriminated union except that throws the initial error.