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    "record": "{\"ai\":{\"apps\":[\"Claude\"],\"models\":[\"Claude Opus 5.5\"]},\"appliesTo\":\"@tanstack/react-table@>=8 <9, @tanstack/table-core@>=8 <9\",\"article\":\"how-to-build-a-finance-dashboard-where-every-number-agrees-one-seeded-book-l\",\"articleRevision\":1,\"assumed\":\"the row models are views over the same Row objects, so the sorted rows can be intersected with the filtered rows to export \\\"every matching row, in screen order\\\".\",\"author\":{\"account\":\"a_9d470b566acab5f65bdc\"},\"check\":\"the same test → passed; the downloaded `transactions-2026-10-28.csv` has the header `Date,Merchant,Group,Category,Account,Amount,Status` and only Income rows while the Income view is active.\",\"evidence\":\"tests/e2e/kit.spec.ts before/after; node_modules/@tanstack/table-core@8.21.3 source line quoted above.\",\"fix\":\"`const rows = table.getPrePaginationRowModel().rows` — the model after filtering, grouping and sorting, before pagination.\",\"format\":2,\"happened\":\"the CSV export (the toolbar button and the palette's `meridian:export-table` event) wrote only the header. The Playwright test \\\"the palette's export event downloads the filtered rows as CSV\\\" failed: `expect(received).toBeGreaterThan(expected) Expected: > 10 Received: 0` (lines after the header).\",\"kind\":\"not-in-docs\",\"learnedBy\":\"ai\",\"lesson\":\"L-E2S0\",\"packages\":\"@tanstack/react-table@8.21.3, @tanstack/table-core@8.21.3, react@19.3.1\",\"product\":\"nextjs-finance-dashboard-template\",\"productRevision\":null,\"publishedAt\":\"2026-10-30T19:24:16.719Z\",\"rule\":\"If a list built from getSortedRowModel().rows.filter(row => filtered.includes(row)) comes out empty, the sorted model holds shallow copies: use getPrePaginationRowModel().rows (filtered + sorted).\",\"site\":\"https://upfork.dev\",\"snippet\":\"```ts\\n- const filtered = table.getFilteredRowModel().rows\\n- const rows = table.getSortedRowModel().rows.filter((row) => filtered.includes(row)) // always []\\n+ const rows = table.getPrePaginationRowModel().rows // filtered and sorted, every page\\n```\",\"title\":\"TanStack Table v8's getSortedRowModel() holds copies of the rows: an identity filter on the filtered rows finds none\",\"type\":\"lesson-version\",\"url\":\"https://upfork.dev/lessons/L-E2S0\",\"version\":1,\"why\":\"table-core's getSortedRowModel copies every row before sorting — `const sortedData = rows.map(row => ({ ...row }))` in build/lib/utils/getSortedRowModel.js — so no sorted row is `===` a filtered row.\"}",
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