T
TanStack•7d ago
fascinating-indigo

`field.state.meta.isValid` not updated when validating on the server

field.state.meta.isValid is true in Next.js after server validation, unless I also apply the same validation on the client. Shouldn't that state be merged by mergeForm? Would be a lot easier DX if I could just rely on field.state.meta.isValid and field.state.meta.errors instead of having to merge those manually.
5 Replies
fascinating-indigo
fascinating-indigoOP•7d ago
This is what I'm currently having to use to get to the username field errors... does anybody know of a better way? This seems strange: 
const formErrors = useStore(form.store, (state) => state.errors)
const usernameErrors = formErrors
    .filter((error) => error != null)
    .filter((error) => 'username' in error)
    .flatMap((error) => error.username)
const formErrors = useStore(form.store, (state) => state.errors)
const usernameErrors = formErrors
    .filter((error) => error != null)
    .filter((error) => 'username' in error)
    .flatMap((error) => error.username)
fascinating-indigo
fascinating-indigo•7d ago
it should be, yeah. What is the error generated in the nextjs validation?
fascinating-indigo
fascinating-indigoOP•6d ago
no error, it showed as valid even if the server validation failed - i just assumed i couldn't rely on field.state.meta.isValid if I only validated it on the server, so I passed the same zod schema to the client validator as well
fascinating-indigo
fascinating-indigo•6d ago
could you share your server validate? I‘ll see if there‘s a problem with it this evening or tomorrow
ratty-blush
ratty-blush•5d ago
I have the same problem. Looks like there are a couple of issues in the repo about it: - FieldAPI: state.meta.errors are not updating properly when using server-validations for errors - Zod refine errors with specific paths aren't propagated to field error states - Zod errors from server action aren't propagated to field error. And even a PR. For now, I'm handling it manually, getting the error from the field meta for the client side validation and the form errorMap for the server side validation. Something like this: 
  const field = useFieldContext();
  const fieldError = useStore(field.store, (state) => state.meta.errors[0]);
  const serverError = useStore(
    field.form.store,
    (state) => state.errorMap.onServer?.fields[field.name]?.[0],
  );
  const field = useFieldContext();
  const fieldError = useStore(field.store, (state) => state.meta.errors[0]);
  const serverError = useStore(
    field.form.store,
    (state) => state.errorMap.onServer?.fields[field.name]?.[0],
  );
But it would be nice if the mapping was handled by mergeForm, to get the field specific errors sent by the server validation in its respective field meta

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