[API reference](https://evolu.dev/docs/api-reference) › [@evolu/common](https://evolu.dev/docs/api-reference/common) › [Type](https://evolu.dev/docs/api-reference/common/Type) › DiscriminatedUnionDiscriminatorError

Defined in: [packages/common/src/Type.ts:12567](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L12567)

An error returned when no member of [discriminatedUnion](https://evolu.dev/docs/api-reference/common/Type/functions/discriminatedUnion) matches.

## Extends

- [`TypeError`](https://evolu.dev/docs/api-reference/common/Type/interfaces/TypeError)\<`"DiscriminatedUnion"`\>

## Properties

<a id="reason"></a>

### reason

```ts
readonly reason: {
  expected: readonly Expected[];
  key: Key;
  kind: "Discriminator";
  value: unknown;
};
```

Defined in: [packages/common/src/Type.ts:12571](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L12571)

| Name       | Type                  | Defined in                                                                                                                                             |
| ---------- | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------ |
| `expected` | readonly `Expected`[] | [packages/common/src/Type.ts:12575](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L12575) |
| `key`      | `Key`                 | [packages/common/src/Type.ts:12573](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L12573) |
| `kind`     | `"Discriminator"`     | [packages/common/src/Type.ts:12572](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L12572) |
| `value`    | `unknown`             | [packages/common/src/Type.ts:12574](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L12574) |

---

<a id="type"></a>

### type

```ts
readonly type: "DiscriminatedUnion";
```

Defined in: [packages/common/src/Type.ts:870](https://github.com/evoluhq/evolu/blob/037c390af081e9944d616ff298a729515c5c5ab7/packages/common/src/Type.ts#L870)

#### Inherited from

[`TypeError`](https://evolu.dev/docs/api-reference/common/Type/interfaces/TypeError).[`type`](https://evolu.dev/docs/api-reference/common/Type/interfaces/TypeError#type)