Zod 4.0.15 and Superforms incompatibility #630
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Description
A clear and concise description of what the bug is, and, unless obvious, what you expected instead.
The following use of Superforms and a simple schema presents a TypeScript error that didn't present on Zod 3.
export const load = async (event) => {
const { locals } = event;
const user = locals.user;
const form = await superValidate({ value: user.user_info.gender }, zod4(GenderSchema));
if (user.consented_at == null) {
return error(404, 'Not found.');
}
return {
form,
title: m['gender-title']()
};
};
export const actions = {
default: async (event) => {
const { request, cookies, locals } = event;
const form = await superValidate(request, zod4(GenderSchema));
if (!form.valid) {
return fail(400, { form });
}
const user = locals.user;
user.user_info.gender = form.data.value as Gender;
setUserCookie(cookies, user);
throw proceed();
}
};import { object, string } from 'zod/mini';
export const GenderSchema = object({
value: string()
});The error in the editor is this:
Argument of type 'ZodObject<{ value: ZodString; }, $strip>' is not assignable to parameter of type 'ZodValidationSchema'.
Type 'ZodObject<{ value: ZodString; }, $strip>' is not assignable to type '$ZodDiscriminatedUnion<($ZodObject<Readonly<Readonly<{ [k: string]: $ZodType<unknown, unknown, $ZodTypeInternals<unknown, unknown>>; }>>, $ZodObjectConfig> | $ZodDiscriminatedUnion<...>)[]>'.
The types of '_zod.def' are incompatible between these types.
Type '$ZodObjectDef<{ value: ZodString; }>' is missing the following properties from type '$ZodDiscriminatedUnionDef<($ZodObject<Readonly<Readonly<{ [k: string]: $ZodType<unknown, unknown, $ZodTypeInternals<unknown, unknown>>; }>>, $ZodObjectConfig> | $ZodDiscriminatedUnion<...>)[]>': discriminator, options (tsserver 2345)
The validation is working but the types are wrong.