issue Cannot read properties of undefined (reading 'onServer')

[solo-samurai]

Describe the bug

Uncaught TypeError: Cannot read properties of undefined (reading 'onServer')
at FormApi.ts:1699:17
at batch (scheduler.ts:145:5)
at FormApi.validateSync (FormApi.ts:1656:5)
at FieldApi.validate (FieldApi.ts:1883:19)
at FieldApi.setValue (FieldApi.ts:1371:12)
at FieldApi.handleChange (FieldApi.ts:1907:10)
at InputField[.onChange] (index.tsx:129:28)
at mergeProps.js:133:22
at executeDispatch (react-dom-client.development.js:20543:9)
at runWithFiberInDEV (react-dom-client.development.js:986:30)
at processDispatchQueue (react-dom-client.development.js:20593:19)
at react-dom-client.development.js:21164:9
at batchedUpdates$1 (react-dom-client.development.js:3377:40)
at dispatchEventForPluginEventSystem (react-dom-client.development.js:20747:7)
at dispatchEvent (react-dom-client.development.js:25693:11)
at dispatchDiscreteEvent (react-dom-client.development.js:25661:11)
(anonymous) @ FormApi.ts:1699
batch @ scheduler.ts:145
FormApi.validateSync @ FormApi.ts:1656
FieldApi.validate @ FieldApi.ts:1883
FieldApi.setValue @ FieldApi.ts:1371
FieldApi.handleChange @ FieldApi.ts:1907
InputField[.onChange] @ index.tsx:129
(anonymous) @ mergeProps.js:133
executeDispatch @ react-dom-client.development.js:20543
runWithFiberInDEV @ react-dom-client.development.js:986
processDispatchQueue @ react-dom-client.development.js:20593
(anonymous) @ react-dom-client.development.js:21164
batchedUpdates$1 @ react-dom-client.development.js:3377
dispatchEventForPluginEventSystem @ react-dom-client.development.js:20747
dispatchEvent @ react-dom-client.development.js:25693
dispatchDiscreteEvent @ react-dom-client.development.js:25661

Your minimal, reproducible example

non

Steps to reproduce

const schema = z.object({
	name: z.string().min(1, "Name is required"),
	search: z.string().optional(),
	regions: z
		.array(
			z.object({
				country: z.string().min(1, "Country is required"),
				state: z.string().optional(),
			})
		)
		.min(1, "At least one region is required"),
});

const form = useAppForm({
		validators: {
			onSubmit: schema,
		},
		formId: "shipping-zone-form",
		defaultValues: initialValues,
		onSubmit: ({ value }) => onSubmit(value),
	});

Expected behavior

Every time I update the region and call form.setFieldValue("regions", newRegions); it break.
Before then, it works

How often does this bug happen?

Every time

Screenshots or Videos

Platform

windows

TanStack Form adapter

react-form

TanStack Form version

1.27.5

TypeScript version

5.9.3

Additional context

No response

[ben-agnew]

I can confirm the same behaviour in 1.27.5. Rolling back to 1.27.4 resolves the issue for me.

[LeCarbonator]

Does this version fix the issue for you?

npm i https://pkg.pr.new/@tanstack/react-form@1948

[solo-samurai]

The latest version works, thanks