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fix(frontend): Weekly view must always send an explicit date to /grade

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This commit is contained in:
emi 2026-07-26 06:17:25 +00:00
parent 5f20fba9f5
commit 1a7f92be66
1 changed files with 21 additions and 4 deletions
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25
frontend/static/app.js
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@ -152,10 +152,27 @@ async function runGrade() {
updateHash();
placeholder.hidden = true;
results.hidden = false;
// Omit the date when it's today, so the URL (and cache key) matches the prefetch
// fired from the other views — a same-tab navigation then reuses the response.
const q = `lat=${selected.lat}&lon=${selected.lon}`;
const url = dateInput.value === todayISO() ? uv(`grade?${q}`) : uv(`grade?${q}&date=${dateInput.value}`);
// Always send the target date, even when it's "today" — the backend only
// falls back to its own UTC today (api_grade's `date` param default; see
// backend/web/app.py) when the param is omitted or empty, a day behind local
// midnight for any viewer east of UTC (reported from Kaunas, UTC+3: asking
// for 7/26 rendered 7/25). The comment this replaces claimed omitting the
// date kept this URL matching the cross-view prefetch — but that match was
// the other half of the bug: cache.js's viewFetches() seeds the grade view's
// cache entry under this exact dateless URL too, tagged fresh for the
// viewer's local day no matter which day the server actually resolved, so a
// same-tab nav that had already prefetched this cell (e.g. via the Day page)
// could serve that stale, server-resolved slice straight out of IndexedDB
// with no live request ever going out. Sending the real date makes every
// load self-consistent with the viewer's own clock instead of aliasing onto
// whatever "today" the server or an earlier prefetch resolved.
// dateInput.value can also come back empty (a cleared native date field —
// day.js guards the same input for the same reason), so fall back to the
// viewer's local today rather than ever send `date=` empty, which hits that
// same server fallback.
const date = dateInput.value || todayISO();
const q = `lat=${selected.lat}&lon=${selected.lon}&date=${date}`;
const url = uv(`grade?${q}`);
await loadView({
url, ttl: TTL.grade, seq: ++gradeSeq, current: () => gradeSeq,
spinner: () => { results.innerHTML = `<p class="spinner">Fetching decades of climate history…</p>`; },