I’m using Nest.js for the first time and migrating a legacy node.js API. I’m creating the first route to make sure this will preserve the OpenAPI spec capabilities. I’ve created the controller with one route that accepts a JSON body. The body class uses decorators from @nestjs/swagger, and I am able to see the schema show up in the Swatter UI when using the @Body decorator:

@Controller('my-api')
export class CertificatesController {
  @ApiOperation({ })
  @Post()
  async create(
    @Req() req: Request,
    @Res() res: Response,
    @Body() body: TheBody,
  ): Promise<Result> {
    //...
  }
}

However, one thing that the original API had was a description property for the body parameter, and there doesn’t seem to be a way to add one to my TheBody class. I’ve tried adding an ApiBody decorator to the method, and that lets me add a description, but that shadows the schema of body, causing it to show the type as a string instead of the schema defined by TheBody.

How do you add a description to your body parameter in Nest.js without removing the type reflection provided by the @Body decorator?