vicious-gold

Different schema for form and output

Is there a way to specify two different schemas, one for the form state and one for the output upon submission? For example the form schema would be:

// type or using zod
type FormSchema = {
  name: string;
  timezone: Timezone | null; // populated via select
}

// type or using zod
type FormSchema = {
  name: string;
  timezone: Timezone | null; // populated via select
}

while the output schema would be:

type OutputSchema = {
  name: string;
  timezone: Timezone; // notice that this must be set once the form is submitted
}

type OutputSchema = {
  name: string;
  timezone: Timezone; // notice that this must be set once the form is submitted
}

FormSchema would be used within the form (e.g. showing a preview of what the timezone settings are when a timezone is selected or not) while OutputSchema would only be used upon submission and validation.

4 Replies

afraid-scarlet•8mo ago

The form works with the Input Schema, for Zod thats z.input(typeof yourSchema) you can also get the Output Schema using z.output(typeof yourSchema)

const form = useForm({
    defaultValues: {
      // your fields
    } as z.input(typeof yourSchema),
    validators: {
      onSubmit: yourSchema
    },
    onSubmit: ({ value }) => {
    // the `value` here is of the z.input type

        const parsed = yourSchema.safeParse(value)

        if (!parsed.success) throw "Could not parse"

        console.log(parsed.data) // <-- `data` is of z.output type
    },
})

const form = useForm({
    defaultValues: {
      // your fields
    } as z.input(typeof yourSchema),
    validators: {
      onSubmit: yourSchema
    },
    onSubmit: ({ value }) => {
    // the `value` here is of the z.input type

        const parsed = yourSchema.safeParse(value)

        if (!parsed.success) throw "Could not parse"

        console.log(parsed.data) // <-- `data` is of z.output type
    },
})

vicious-goldOP•8mo ago

I see. Weird, I would expect value in onSubmit to be already validated based on validators

extended-salmon•8mo ago

but field schemas could take precedence and have different outputs so it would still be unintuitive. As for now, it voids the transformed output

vicious-goldOP•8mo ago

I see, thanks all ❤️

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Different schema for form and output

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