Graph/3a99af07-e922-420c-98d2-81c4ce9f272a

Domainunvalidated

Form Validation

3a99af07-e922-420c-98d2-81c4ce9f272a

Form Validation

Node Details

Public graph metadata

Updated4/30/2026

PageRank0.0012

Effectiveness0.000

Connections

50 linked nodes

RELATES_TOProblem

`mode_of_payment` isn't a required field but when you fill it out, the `account_id` should become required — I have a problem requiring the `account_id` field when `mode_of_payment` has a value. Tension: My code below still doesn't make the `account_id` required when `mode_of_payment` has been filled out.

RELATES_TOSolution

id: string().when('mode_of_payment_id', { — account_id: object().shape({. Outcome: is: (mode_of_payment_id) => !!mode_of_payment_id?.id,.

IMPLEMENTATION_OFPackage

zod

PERTAIN_TOProblem

React app loading state behaves unpredictably because useEffect runs twice in Strict Mode

PERTAIN_TOProblem

Upon clicking the SubmitBtn in the LoginForm component for the first time, the form fails to submit, and nothing appears to happen. — in the LoginForm component for the first time. Tension: on the second attempt, the onInvalid function provides the following feedback. Outcome: the form remains unsubmitted, and no observable changes occur.

PERTAIN_TOSolution

The solution I found is to add a new schema for the login. — loginService. Tension: picking only the email and password from FormType in loginService. Outcome: And picking only the email and password from FormType in loginService.

PERTAIN_TORootCause

react-hook-form in my nextjs component with shadcnUI Form. Tension: React hooks work only in Client Components. Outcome: The export useForm was not found in module [project]/node_modules/.pnpm/react-hook-form@7.56.1_react@19.1.0/node_modules/react-hook-form/dist/react-server.esm.mjs [app-rsc].

PERTAIN_TOProblem

In a multi-step Next.js form using react-hook-form and shadcn/ui, when the user fills step 2, then navigates back to step 1, the step 2 values appear in step 1 fields.

PERTAIN_TOProblem

superrefine() and refine() is checked only if the initial check is fulfilled. — fieldCodeToConcat has to be an object first according to the condition. Tension: Issue is that superrefine() and refine() is checked only if the initial check is fulfilled. Outcome: fieldCodeToConcat can be changed to a value that is expected to be true so that it goes on to refine() / superrefine().

PERTAIN_TOSolution

for fine grained validation, fieldCodeToConcat can be changed to a value that is expected to be true so that it goes on to refine() / superrefine() — fieldCodeToConcat can be changed to a value that is expected to be true. Tension: superrefine() and refine() is checked only if the initial check is fulfilled. Outcome: The console log would get printed in this case.

PERTAIN_TOProblem

In a React Hook Form + Zod multi-step form, custom validation logic in `refine()`/`superRefine()` was not being triggered, even when the condition should have passed.

PERTAIN_TOSolution

Change the enum field to accept empty initial state (e.g., `z.enum(...).optional().nullable()` or similar) and move the “required” check into `superRefine()`/manual validation so refinements run consistently.

PERTAIN_TOSolution

Align the schema to the actual data shape (e.g., use `z.array(z.object(...))` for `templateDefaults`) and/or override Zod’s default `invalid_type` message using an `errorMap` on the relevant Zod type so trigger() receives the custom message.

PERTAIN_TOProblem

The Shadcn Form page crashes with a TypeError: Cannot destructure property 'getFieldState' of 'useFormContext(...)' as it is null when rendering the form fields.

PERTAIN_TOSolution

Import `Form` (and related components like `FormField`, `FormItem`, etc.) from `@/components/ui/form` instead of `react-hook-form`, so the Shadcn components receive the correct `FormProvider` context.

PERTAIN_TOProblem

switching the input from uncontrolled to controlled — If I don’t set a defaultValue for the number input. Outcome: use a modified, "controlled" version of the `Input` component by passing a default `value` to the underlying ``.

PERTAIN_TOSolution

You can use `coerce` to parse the value into a `number` — with react-hook-form, Zod, and ShadCN UI. Tension: This way you don't have to define a default value either. Outcome: passing a default `value` to the underlying ``.

PERTAIN_TOProblem

I had default values like this: `const preparedInitialData = { editing: false, name: "", email: "", password: "", gender: "",. Tension: breaks superRefine if empty.

PERTAIN_TOProblem

A React Hook Form + Zod form with a ShadCN number input triggers controlled/uncontrolled state warnings and type mismatches when the number field lacks a proper default value (undefined or empty string). Using 0 as a default prevents the warning but forces an unwanted initial value that blocks placeholder behavior.

PERTAIN_TOSolution

Avoid validating the input as a numeric type directly; validate it as a string with a regex (e.g., `z.string().regex(/^[1-9]\d*$/)`) and then convert it to a number in `onSubmit` (or when mapping form data), adjusting the regex if floats are needed.

PERTAIN_TOProblem

Submitting the form (clicking a submit button) does not trigger the onSubmit handler wrapped by react-hook-form's handleSubmit. The component shows no visible errors.

PERTAIN_TOSolution

Add the missing FormField(s) that match the schema paths (e.g., dailyOrders.${index}.quantity) and ensure all input names in the UI match the form schema. After aligning rendered fields with the schema, the submit button will correctly trigger onSubmit.

PERTAIN_TOSolution

To make this work, you should not use nested triggers. — the tooltip dialog combo. Tension: It is also enough to keep the open state only for the dialog. Outcome: Reorganize the code as follows to make it work.

PERTAIN_TOProblem

clicking `Button 1` triggers a validation on the job name field — without causing validation. Tension: I only want the submit button to trigger validation. Outcome: removing the Tooltip around `Button 1` fixes the issue.

PERTAIN_TOSolution

Create useFieldOptionality hook — Pass zod schema. Tension: Field ${fieldName} not found in schema. Make sure the field exists in the schema or do not pass the schema inside the Form. Outcome: return zodField instanceof ZodOptional.

PERTAIN_TOProblem

if I would place these in the array, they would appear several times — display my Zod validation error messages using the `` and `` components from Shadcn/ui. Tension: these in the array, they would appear several times.

PERTAIN_TOSolution

Tension: if I would place these in the array, they would appear several times.

PERTAIN_TOSolution

parse.error.flatten().fieldErrors — Nextjs server action with zod validation. Tension: hard to return errors and show them in the UI. Outcome: form.setError(error.field, { message: error.message });.

PERTAIN_TOProblem

It actually add a `text-destructive` automatically — when a field has error/required. Tension: I only want the `` to change the color.

PERTAIN_TOSolution

You could go this route — shadcn's ``.

PERTAIN_TOSolution

pass `!text-current` as a class name to override the behaviour — You could make changes to the `FormLabel` itself. Tension: this might be problematic when `shadcn` is updated. Outcome: You can simply pass `!text-current` as a class name to override the behaviour.

PERTAIN_TOSolution

`handleSubmit` will preventDefault and receive the form data if form validation is successful. Tension: you don't need ref. Outcome: you can just pass your server action in `handleSubmit`.

PERTAIN_TOProblem

the name and email dont get updated to the correct defaults — if I manually refresh the page. Tension: it takes about 0.5 seconds for the useSession to update the session with current user session. Outcome: how do I force my useForm hook to re-initialize?

PERTAIN_TOSolution

form.setValue('firstName', session?.user.name); — useEffect(() => { //firstName.value = session?.user.name; console.log(`Session changed. User: ${session?.user.email}`);. Outcome: form.setValue('firstName', session?.user.name); form.setValue('emailAddress', session?.user.email);.

PERTAIN_TOProblem

it makes perfect sense for string arrays, but I can't get it to work for an object array — I'm fairly new to React, and I'm trying to build a dynamic form that includes an array of route stops using RHF + Typescript + Zod + ShadCN. Tension: When I try `{...form.register(`stops.${index}.city`)}`, it correctly renders the default values, but the submit button doesn't do anything and the validation will throw `undefined` or false negatives for wrong input.

PERTAIN_TOProblem

I haven't fully grasped zod's schema so I'm a little stuck on how to implement this — one of the questions want the user to select a checkbox (or multiple checkboxes). Tension: I tried changing around the schema a couple times, I even mapped through an array of the items I wanted to be checked and rendered them as checkboxes but I was unsuccessful.

PERTAIN_TOSolution

Use react-hook-form control with a matching zod schema and set the checkbox field value explicitly with setValue

PERTAIN_TOProblem

const idValue = formData.get('id'); — when deployed on vercel. Tension: data shows correctly on the console.

PERTAIN_TOSolution

const idValue = formData.get('id'); — when deployed on vercel. Tension: data shows correctly on the console. Outcome: update({ name, price }).eq('id', idValue).

PERTAIN_TOProblem

when I try to insert an e-mail that does not match the pattern it still does get inserted into the database — I'm currently working on an api using fastapi and sqlmodel. Tension: I've read in some github issues that the regex parameter is not working properlly with pydantic. Outcome: You need instead to use a Pydantic-native validation method.

PERTAIN_TOSolution

You can use the pattern argument directly on the Field object. — For email validation specifically, Pydantic provides a dedicated type called EmailStr. Tension: schema_extra is for API documentation, not for validation. Outcome: EmailStr ensures that any data assigned to the email field will be validated against a well-tested email regex.

PERTAIN_TOProblem

Pydantic ValidationError loc includes the discriminated union discriminator value

PERTAIN_TOSolution

Use a wrap model_validator to catch ValidationError and re-raise it with a rewritten loc

PERTAIN_TOProblem

Validation errors set inside the onSave/submit handler are not reflected in formMethods.formState.errors when checked immediately, leading to incorrect conditional logic. The developer expects updated errors to be available in the same callback scope.

PERTAIN_TOSolution

Rely on react-hook-form’s built-in validation by moving the custom validation into field-level rules or into handleSubmit’s validation flow. Alternatively, use the onError callback of handleSubmit to handle validation failures (e.g., set root errors there) instead of checking formState.errors inside onSave immediately after setError.

PERTAIN_TOSolution

Set the modal trigger to call Formik's handleSubmit (or use a type="button" that invokes handleSubmit) and update setSubmitting/isSubmitting within Formik's onSubmit. Use an async operation (or proper promise) inside onSubmit so Formik can manage isSubmitting correctly.

PERTAIN_TOProblem

only the count fields (adult and child) are passed successfully — when submitting the form from an iPhone. Tension: Other fields like name and email do not appear in the $_POST array on the PHP side.

PERTAIN_TOSolution

Could you show me a piece of your code, where you declare your variable and where you assign the value? — when using useState. Tension: Have you tried to debug the value with maybe an `alert()`? Outcome: Could you show me a piece of your code, where you declare your variable and where you assign the value?

PERTAIN_TORootCause

Mantine's `useForm` manages values and validation independently, while react-router-dom's `<Form>` relies on native form submission and `name`-based inputs to populate `request.formData`. When switching to react-router-dom's `<Form>` without proper `name` wiring and submission flow, the submission bypasses Mantine's validation and/or produces incomplete form payloads.

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