fix(table-core): support numeric accessor keys by KevinVandy · Pull Request #6434 · TanStack/table

KevinVandy · 2026-07-17T20:19:01Z

What changed

support numeric accessorKey values when constructing tuple/array columns
derive stable string column IDs while retaining the numeric key for row access
preserve numeric tuple value inference in DeepValue
keep worker aggregation column IDs consistent with normal column construction
add runtime and type-level regression coverage for tuple indices 0 and 1

Why

Numeric tuple accessors are accepted by the public types and documented usage, but column construction treated index 0 as absent and called string methods on other numeric indices. This caused valid array-index columns either to lack an ID/accessor or to throw.

Validation

all @tanstack/table-core tests: 52 files, 1,002 tests passed
TypeScript source and declaration-emit checks passed
Prettier check passed
git diff --check passed

Closes #4815

Summary by CodeRabbit

New Features
- Added support for numeric accessor keys, including tuple-based row data.
- Column identifiers are now generated correctly from numeric and other defined accessor keys.
- Improved type support for accessing properties through non-string keys.
Bug Fixes
- Corrected handling of falsy accessor keys such as 0 and empty strings.
- Improved deep property access and aggregation column identifier generation.

coderabbitai · 2026-07-17T20:19:10Z

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 4817a4b0-5e23-4c66-a872-3e5a3c8b8bb6

📥 Commits

Reviewing files that changed from the base of the PR and between a4040a2 and 8502850.

📒 Files selected for processing (5)

packages/table-core/src/core/columns/constructColumn.ts
packages/table-core/src/types/ColumnDef.ts
packages/table-core/src/types/type-utils.ts
packages/table-core/src/worker/initTableWorker.ts
packages/table-core/tests/unit/helpers/columnHelper.test.ts

📝 Walkthrough

Walkthrough

Numeric accessorKey values are now supported through updated type definitions, deep-value inference, column construction, and worker ID derivation. Tests cover tuple row access, generated string IDs, resolved values, and inferred cell types.

Changes

Numeric accessor key support

Layer / File(s)	Summary
Accessor key contracts and runtime handling `packages/table-core/src/types/ColumnDef.ts`, `packages/table-core/src/types/type-utils.ts`, `packages/table-core/src/core/columns/constructColumn.ts`, `packages/table-core/src/worker/initTableWorker.ts`	Accessor keys accept `keyof TData`; deep-value indexing supports those keys; column and aggregation IDs handle defined non-string or falsy keys.
Tuple accessor validation `packages/table-core/tests/unit/helpers/columnHelper.test.ts`	Tests verify numeric tuple indices produce string IDs, resolve row values, and preserve inferred cell types.

Estimated code review effort: 3 (Moderate) | ~20 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely summarizes the main change: support for numeric accessor keys in table-core.
Linked Issues check	✅ Passed	The changes address `#4815` by supporting numeric accessorKey values, preserving tuple access, and adding regression tests.
Out of Scope Changes check	✅ Passed	All code and test changes are directly related to numeric accessorKey support and its type/runtime handling.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

📝 Generate docstrings

Create stacked PR
Commit on current branch

🧪 Generate unit tests (beta)

Create PR with unit tests
Commit unit tests in branch agent/fix-4815-numeric-accessor-key

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nx-cloud · 2026-07-17T20:20:06Z

View your CI Pipeline Execution ↗ for commit 8502850

Command	Status	Duration	Result
`nx affected --targets=test:eslint,test:sherif,t...`	✅ Succeeded	7m 44s	View ↗
`nx run-many --targets=build --exclude=examples/**`	✅ Succeeded	54s	View ↗

☁️ Nx Cloud last updated this comment at 2026-07-17 20:28:43 UTC

pkg-pr-new · 2026-07-17T20:22:49Z

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commit: 8502850

fix numeric accessor keys

8502850

KevinVandy marked this pull request as ready for review July 17, 2026 21:56

KevinVandy merged commit 9e92697 into beta Jul 17, 2026
9 checks passed

KevinVandy deleted the agent/fix-4815-numeric-accessor-key branch July 17, 2026 22:00

schardev mentioned this pull request Jul 18, 2026

fix: coerce accessor key to string during column creation #5808

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fix(table-core): support numeric accessor keys#6434

fix(table-core): support numeric accessor keys#6434
KevinVandy merged 1 commit into
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agent/fix-4815-numeric-accessor-key

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