Feature Request: Custom error message for primitive type errors

Yup allows for defining an error message for failed type checks via a typeError(message: string) operator. Doesn’t seem like there’s anything like this in Zod. I’d rather have custom humanized error messages than an unchangeable: Expected number, received nan.

[BigWhale]

I have just switched from Yup to Zod, because type inferring is better and it works better with react-hook-forms. I have a problem with this, too. I’m working with Zod 2 and there seems to be no way of handling errors like this.

I have a schema like this:

const ZodTestSchema = z.object({
  name: z.string().max(80, 'Name too long.').nonempty('Name required.'),
  age: z.transformer(z.string(), z.number(), (value) => parseInt(value, 10)).optional()
  .refine((v) => v > 0, { message: 'Age must be positive.' }),
  options: z.object({
    label: z.string(),
      value: z.string().nonempty('Option value required.'),
  }),

And there’s no way (or I couldn’t find any) to customize messages for type errors or messages if z.object() is missing.

[mildfuzz]

This is my current work around

function zodCustomRequired<T>(schema: ZodType<T>, message: string) {
  return schema.nullable().refine((data) => !!data, message)
}

but I think my prefered pattern would be to either assume all types are optional unless marked as required (and allow custom message in that method) or to add a optional message to the constructor