# Field history

> The old and new value of chosen columns of any registered record on every update, who changed it and when, read per record and field.

- Category: Database primitives
- Module: `field-history`
- Modes: `managed`
- Docs: https://bettersupabase.com/docs/blocks/field-history
- Page: https://bettersupabase.com/blocks/field-history

## Install

```bash
npx better-supabase add field-history
```

The command also installs `updated-at`, `tenant`, `access`, `subjects`.

## Configure

Add the block to `better-supabase.config.ts`:

```ts
import { defineConfig } from "better-supabase/config";

export default defineConfig({
  blocks: {
    // Required by field-history; add installs them too.
    "updated-at": {},
    tenant: {},
    access: {},
    subjects: {},
    // Modes: "managed". The default is "managed".
    "field-history": { mode: "managed" },
  },
});
```

## Client

The block has no React entry yet. Its server-side TypeScript is in `better-supabase/blocks/field-history`.

## Related blocks

Requires: [tenant](https://bettersupabase.com/blocks/tenant.md), [access](https://bettersupabase.com/blocks/access.md), [subjects](https://bettersupabase.com/blocks/subjects.md)

Works with: [data-lifecycle](https://bettersupabase.com/blocks/data-lifecycle.md)