fix(hooks): let the current request and the current scan win - #3065
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Two places where an answer to an earlier question overwrote the answer to the current one. `useApiQuery` started a fetch per dependency change and never cancelled the last one, so whichever response happened to be slower landed last. Across 23 call sites that means a search or pagination change can render the previous query's rows. Requests now carry an AbortController and a superseded one is ignored rather than applied. The callbacks had to move into refs for that to be safe. They were effect dependencies and every call site passes an inline arrow, so cancelling on dependency change would abort each request on the render its own `setIsLoading` triggered and nothing would ever resolve. The query is now keyed on what identifies it — url, enabled, refetch — while still calling the newest callback the caller rendered. A disabled query also reports itself as not loading, because cancelling skips the `finally` and every dialog gating on `open` disables mid-request. `usePosition` kept bare coordinates in a module atom shared by the `qr+` layout and its child. The atom outlives the scan that filled it, so a scan whose GPS never answered — a denied prompt, a timeout indoors — posted the position of wherever the previous scan happened. The atom now stores the scan alongside the fix and a fix is only reported for the scan it belongs to, which makes the staleness unreachable rather than cleared after the fact. Asking for a fix is keyed on the scan too, instead of firing once on mount. Companion-side siblings of the first bug (the assets list and custody search) belong to another team and are untouched here.
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Included review availability: Your plan provides up to 8 included reviews per hour; 7 remain after this review. WalkthroughThe pull request updates ChangesAPI query lifecycle
Scan-scoped geolocation
Priority: ➖ Normal Estimated code review effort: 3 (Moderate) | ~25 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant useApiQuery
participant AbortController
participant fetch
participant callbacks
useApiQuery->>AbortController: Create controller
useApiQuery->>fetch: Start request with AbortSignal
useApiQuery->>AbortController: Abort previous request on rerun
fetch-->>useApiQuery: Return response or rejection
useApiQuery->>callbacks: Invoke current callback when not aborted
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Actionable comments posted: 5
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
In `@apps/webapp/app/hooks/use-api-query.test.ts`:
- Around line 465-466: Update the comment near the hand-built deferred responses
to describe the test constraint directly: deferred responses control completion
order and verify that only the current request updates hook state. Remove the
defect-history wording about “the whole bug.”
- Around line 494-496: Update the stale-response test around resolveFirst and
firstResponse to flush the complete asynchronous response chain inside act:
resolve the fetch, await firstResponse, and await the subsequent microtasks
before asserting result.current.data remains page 2. Keep the final assertion
outside the flush and preserve the existing expected data.
In `@apps/webapp/app/hooks/use-api-query.ts`:
- Line 1: Add file-level JSDoc blocks to both use-api-query.ts and
use-api-query.test.ts before their imports, and add a JSDoc block immediately
before the exported useApiQuery function. Document the hook’s purpose and
behavior without changing its implementation.
- Around line 53-56: Update the callback-ref synchronization effect in
useApiQuery to use useLayoutEffect instead of useEffect, ensuring onSuccessRef
and onErrorRef are refreshed synchronously after commits and before asynchronous
completion handlers can run; add the corresponding React import while preserving
the existing assignments.
In `@apps/webapp/app/hooks/use-position.test.ts`:
- Around line 24-26: Add a // why: comment immediately before the vi.mock call
for useSearchParams, explaining that the mock controls scanId transitions in the
test. Keep the existing mock behavior unchanged.
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`positionAtom` lives in Jotai's module-wide default store, so one case's fix stayed available to the next. The second case asserts that a scan posted something before checking that the NEXT scan posts nothing — and that first assertion could be satisfied by a value the case never recorded, which would hide the recording breaking entirely. Each case now builds its own store and renders through a Provider bound to it. Sharing the store WITHIN a case stays deliberate: that is how the `qr+` layout and its child route see one scan's fix, and it is the mechanism under test. Checked both ways — the case passes when run alone, and still fails when the scan-scoping is reverted. Also document why the geolocation API is mocked.
A passive effect updates the refs after the commit, so a response landing between a callback-changing commit and the next flush was handed the callback from the render before it. A layout effect closes that window. It has to be the isomorphic form: layout effects do not run during SSR and React warns when a server-rendered component asks for one, and this hook renders on the server wherever it is used. Also strengthen the superseded-response case. Settling the held fetch was not enough to exercise the guard — `response.json()` and the handler after it run in later microtasks, so the assertion could pass on the newer data without the stale path ever being reached. The chain is now drained inside `act`; reverting the guard fails the case, which it would not reliably have done before. Plus the docs these files were missing: what the hook guarantees and why, what the suite pins, and why the scanId is mocked.
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Closes two detail.dev findings — D118 and D049. Both are "the answer to an earlier question
overwrote the answer to the current one", and in both cases nothing throws: the UI shows real
data, and the scan record holds real coordinates. Just not the ones belonging to what the user
is looking at.
D118 —
useApiQuerynever cancelled a superseded requestThe hook started a fetch on every dependency change and left the previous one running, so
whichever response happened to be slower landed last. It is used in 23 call sites —
command palette, location badges, scanner rows, audit team-member selector, report PDFs — so a
search keystroke or a page change can render the previous query's rows. The test holds page 1
open, lets page 2 answer, then releases page 1; before the fix,
dataends up as{ page: 1 }.Requests now carry an
AbortControllerand a superseded response is ignored rather thanapplied.
Two second-order changes a reviewer should push on
The callbacks had to move into refs.
onSuccess/onErrorwere effect dependencies, andevery call site that passes them passes an inline arrow (
audit-receipt-pdf.tsx,report-pdf.tsx,compliance-report-pdf.tsx). With them still in the deps, cancelling ondependency change would abort each request on the render its own
setIsLoading(true)triggered, restart it, and loop — the PDF previews would never load. The query is now keyed on
what actually identifies it (url,
enabled, refetch) and still calls the newest callback thecaller rendered. Pinned by a test where the caller passes a new closure every render.
I checked whether anything depended on the old refetch-on-callback-identity behaviour: the
three PDF components gate with
enabled: open && !pdfMeta, andgeneric-item-row.tsxalreadymemoises with
useCallback. Nothing did.A disabled query now reports itself as not loading — and this one was a bug I introduced.
Skipping the
finallyon abort leftisLoadingstucktruewhenenabledflipped falsemid-flight, which is precisely what every dialog does when it closes. The old code got this
right by accident, because the request it left running eventually cleared the flag. Caught
before pushing, with its own test confirmed red first.
D049 — a QR scan inherited the previous scan's coordinates
usePositionkept bare coordinates in a module-level atom, shared on purpose: theqr+layoutand its child route both mount the hook for one scan. The atom outlives the scan that filled
it, so a scan whose GPS never answered — a denied prompt, a timeout indoors — submitted the
position of wherever the previous scan happened. The test reproduces it: scan-2 is posted
with
latitude: '1', scan-1's fix.The atom now stores
{ scanId, coords }and a fix is only ever reported for the scan itbelongs to, so the staleness is unreachable by construction rather than cleared after the fact.
Asking for a fix is keyed on
scanIdtoo, rather than firing once on mount — a new scan needsits own.
Testing
Every new test was verified red against the old code first.
use-api-query.test.ts: superseded response ignored; a new callback each render stillresolves; a disabled query stops loading. The eight existing
fetchassertions now alsoassert a signal is passed.
use-position.test.ts(new): the fix for the scan in the url is posted; an earlier scan'sfix is not posted when this scan gets none.
All 9 suites that touch these hooks pass (60 tests), webapp typecheck green, lint clean,
React Doctor 100/100 on the changed files.
Not in scope
The same stale-response class exists in the companion app — the assets list (D015) and custody
search (D127), plus the scanner batch surviving a workspace switch (D025). Those files belong
to another team and are untouched here; they stay open on the triage board for coordination
rather than being quietly closed by this PR.
Summary by CodeRabbit
Bug Fixes
Tests