Fastify Swagger + TypeORM break application/x-www-form-urlencoded parsing

I’m submitting a…

[ ] Regression 
[x] Bug report
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

500 error when a body with application/x-www-form-urlencoded type is sent. Happens when Swagger is used in conjunction with TypeORM.

Expected behavior

application/x-www-form-urlencoded body is parsed.

Minimal reproduction of the problem with instructions

Repo

npm run start:dev, then curl -da=b localhost:3000

Commenting out either the SwaggerModule.setup or TypeOrmModule.forRoot call causes the issue not to occur.

Environment

Nest version: 7.0.0

[Summon528]

Another temporary workaround (disable built-in bodyParser and enable formbody manually)

  import * as FastifyFormBody from 'fastify-formbody';

  const app = await NestFactory.create<NestFastifyApplication>(
    AppModule,
    new FastifyAdapter(),
    { bodyParser: false },
  );

  app.register(FastifyFormBody as any);

[kamilmysliwiec]

const app = await NestFactory.create<NestFastifyApplication>(
  AppModule,
  new FastifyAdapter(),
);
await app.init(); // <-- this

Adding await app.init() should fix this issue. It seems that the body parser plugin must be registered before fastify-swagger (in fastify v3)