# RouteConstraints

**Kind:** Function

**Source:** [`packages/platform-fastify/decorators/route-constraints.decorator.ts`](https://github.com/nestjs/nest/blob/master/packages/platform-fastify/decorators/route-constraints.decorator.ts#L10)

**Part of:** [Platform Fastify](subsystem-packages-platform-fastify)

## Signature

```ts
function RouteConstraints(config: RouteShorthandOptions['constraints'])
```

## Parameters

| Name | Type |
|---|---|
| `config` | `RouteShorthandOptions['constraints']` |

## Relationships

- IMPORTS → `SetMetadata`