Fix type of findOne queries in Vue #1134

kevin-dp · 2026-01-14T15:26:53Z

Add type tests reproducing issue #1095 where useLiveQuery with findOne() returns `ComputedRef<Array<T>>` instead of `ComputedRef<T | undefined>`. This differs from the React implementation which correctly types findOne() queries to return a single object or undefined. The tests currently fail, demonstrating the bug.

Update useLiveQuery types to use InferResultType<TContext> which correctly handles the SingleResult type marker, returning `T | undefined` for findOne() queries instead of always returning `Array<T>`. Changes: - Import InferResultType, SingleResult, NonSingleResult from @tanstack/db - Update UseLiveQueryReturn interface to use InferResultType<TContext> - Add UseLiveQueryReturnWithSingleResultCollection for singleResult collections - Add separate overloads for pre-created collections (NonSingleResult vs SingleResult) - Update runtime implementation to return first element for singleResult collections This aligns Vue adapter behavior with the React adapter. Fixes #1095

changeset-bot · 2026-01-14T15:26:56Z

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Latest commit: 30be4dd

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pkg-pr-new · 2026-01-14T15:28:46Z

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commit: 30be4dd

github-actions · 2026-01-14T15:29:22Z

Size Change: 0 B

Total Size: 90.5 kB

ℹ️ View Unchanged

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github-actions · 2026-01-14T15:29:58Z

Size Change: 0 B

Total Size: 3.47 kB

ℹ️ View Unchanged

Filename	Size
`./packages/react-db/dist/esm/index.js`	225 B
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_{compressed-size-action::react-db-package-size}

github-actions · 2026-01-17T04:20:41Z

🎉 This PR has been released!

@tanstack/[email protected]

Thank you for your contribution!

cursoragent added 2 commits January 14, 2026 14:51

kevin-dp added 3 commits January 14, 2026 16:57

Address optional persons in tests

d0a1015

Fix comments

62c1a3c

Changeset

30be4dd

kevin-dp mentioned this pull request Jan 15, 2026

test(vue-db): add type tests for findOne #1133

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kevin-dp changed the base branch from cursor/vue-findone-types-reproduction-4349 to main January 15, 2026 08:41

kevin-dp requested a review from samwillis January 15, 2026 08:42

kevin-dp moved this to Ready for review in TanStack DB 1.0.0 release Jan 15, 2026

kevin-dp added this to TanStack DB 1.0.0 release Jan 15, 2026

kevin-dp mentioned this pull request Jan 15, 2026

[vue-db] useLiveQuery returns array type for data even when using findOne() #1095

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KyleAMathews approved these changes Jan 15, 2026

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kevin-dp merged commit 5e69941 into main Jan 15, 2026
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kevin-dp deleted the cursor/vue-findone-types-fix-4349 branch January 15, 2026 16:17

github-actions bot mentioned this pull request Jan 15, 2026

ci: Version Packages #1140

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KyleAMathews moved this from Ready for review to Done in TanStack DB 1.0.0 release Jan 19, 2026

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