Derived params

[lukemorales]

Discussed in #3

^{Originally posted by zbeyens February 3, 2024}
I'm trying to derive a field from another field using .transform to avoid using a separate hook.

skill: defineRoute('/@[username]/s/[skillTitleId]', {
      // error
      params: z
        .object({
          skillTitleId: z.string(),
          username: z.string().transform((v) => v.slice(3)),
        })
        .transform((v) => ({
          ...v,
          skillId: getTitleUrlId(v.skillTitleId),
        })),

Using this, I'm getting

TS2740: Type
ZodEffects<ZodObject<{ skillId: ZodOptional; skillTitleId: ZodString; username: ZodEffects<ZodString, string, string>; }, "strip", ZodTypeAny, { ...; }, { ...; }>, { ...; }, { ...; }>
is missing the following properties from type
ZodObject<{ username: ZodType<any, ZodTypeDef, any>; skillTitleId: ZodType<any, ZodTypeDef, any>; }, UnknownKeysParam, ZodTypeAny, { ...; }, { ...; }>
: _cached, _getCached, shape, strict, and 14 more.

Would this be supported in some way?