PathValue and FieldPathByValue not working nicely together

[dolma]

Hi all!

I'm having an issue when using the FieldPathByValue type along with the getValues function.

How to reproduce:

interface Props<TFieldValues extends FieldValues> {
    form: UseFormReturn<TFieldValues>;
    name: FieldPathByValue<TFieldValues, string>;
}

const useCustomField = <TFieldValues extends FieldValues>({ form, name }: Props<TFieldValues>) => {
    const { getValues, setValue } = form;

    const value = getValues(name);
    setValue(name, 'New Value');
};

Expected behaviour:

• value should be of type string
• setValue should only allow a string value as its second argument

Current behaviour:

• value is of type PathValue<TFieldValues, FieldPathByValue<TFieldValues, string>> which seems to be behaving like any.
• setValue does not allow a string value to be passed as its second argument. It gives the following error:

Argument of type 'string' is not assignable to parameter of
type 'PathValue<TFieldValues, FieldPathByValue<TFieldValues, string>>'.(2345)

Note:

I can get around the getValues issue by using a type guard, but the setValue issue is a lot more problematic.

Question:

Am I missing something here or value should indeed be of type string?
In fact, more generally, PathValue<TFieldValues, FieldPathByValue<TFieldValues, T>> should resolve to T and not any.

Is there any way to get the proper type out of getValues and setValue or is this just not currently supported in RHF?

[Faizerz]

Did you ever find a solution to this?

[Shentoza]

I have the same issue when i want to have a form input that can be reused in multiple components... Could you solve it?

[briandunn]

Just want to bump this - really need PathValue<TFieldValues, FieldPathByValue<TFieldValues, string>> to be string. FieldPathByValue is so cool, if only it worked.

[jmsandiegoo]

Is there a work around for this?

[BrendanC23]

@bluebill1049 Can you take a look at this?

Here's a reproduction in TypeScript's Playground.

[BrendanC23]

I created a new issue about this problem.