fix(table-core): prototype-named column ids poisoning row value caches

[artchen-db]

🎯 Changes

A column whose id equals an Object.prototype member (most impactfully hasOwnProperty) crashes filtering/sorting:

TypeError: this._valuesCache.hasOwnProperty is not a function

Root cause: the per-row value caches are plain {} objects probed with cache.hasOwnProperty(columnId), then written keyed by column id. When columnId === "hasOwnProperty", the write shadows the inherited method, so the next probe invokes a cached value as a function and throws — breaking filtering for every column on that row, and sorting on the offending column.

Fix: initialize the caches (_valuesCache, _uniqueValuesCache, _groupingValuesCache) with Object.create(null) and read them via Object.prototype.hasOwnProperty.call(...). Also null-prototype _getAllCellsByColumnId so ids like toString/constructor resolve correctly when read via bracket access in getColumnCanGlobalFilter. This removes the entire prototype-collision class for these caches.

Added tests/prototypeColumnId.test.ts covering getValue, getUniqueValues, and the cascading-failure case across hasOwnProperty, toString, constructor, valueOf, __proto__, isPrototypeOf. The test fails without the fix and passes with it.

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: fa0c421d-2860-42c0-85e0-3e0e35a0a43e

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}