fix(vue-query): fix initialData Type Inference Bug in useQuery

[ss0526100]

Overview

In the previous PR(#9073), there was a bug where data was incorrectly inferred as undefined even when initialData was defined. This PR ensures that when initialData is TData, data is correctly inferred as TData, and adds tests to verify this behavior.

Changes

• Bug Fix: Improved type inference for non-undefined initialData

  • Modified to ensure data.value is accurately inferred as TData when initialData is provided with a non-undefined value.
  • Commit: 6e73779

• Test Addition: Type validation for defined initialData

  • Added tests to verify that data is returned as TData type only when initialData is defined.
  • Commit: 2ff92c5, 7684df1

Related Files

• packages/vue-query/src/useQuery.ts
• packages/vue-query/src/tests/useQuery.test-d.ts
• packages/vue-query/src/tests/useQueries.test-d.ts

closes #9069

[saul-atomrigs]

I think we also need to rollback this test case:

query/packages/vue-query/src/__tests__/useQuery.test-d.ts

Lines 62 to 78 in b397fba

	it('TData should always be defined when initialData is provided as a function which ALWAYS returns the data', () => {
	const { data } = reactive(
	useQuery({
	queryKey: ['key'],
	queryFn: () => {
	return {
	wow: true,
	}
	},
	initialData: () => ({
	wow: true,
	}),
	}),
	)
	expectTypeOf(data).toEqualTypeOf<{ wow: boolean } | undefined>()
	})

Initially there was no | undefined in the last line

[ss0526100]

@saul-atomrigs

As I understand it, when initialData is defined, the type of data should be determined.

In the rollback case you suggested, it seems that even though initialData is defined, it returns an undefined type.

Please explain why this test case should have an undefined value. I don't understand well :(

---

A test code with the same description as the test for which you suggested a rollback also exists in the React Query tests, and the expected value is defined.

query/packages/react-query/src/__tests__/useQuery.test-d.tsx

Lines 50 to 64 in b397fba

	it('TData should always be defined when initialData is provided as a function which ALWAYS returns the data', () => {
	const { data } = useQuery({
	queryKey: ['key'],
	queryFn: () => {
	return {
	wow: true,
	}
	},
	initialData: () => ({
	wow: true,
	}),
	})
	expectTypeOf(data).toEqualTypeOf<{ wow: boolean }>()
	})

[saul-atomrigs]

It should NOT have undefined. We should remove it, like in react-query

[ss0526100]

@saul-atomrigs

Sorry, I misunderstood that my PR was incorrect.

I've recognized the issue and completed the fix. I'll push the commit.