gRPC Microservice: Unhandled promise rejection

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

I’m creating a gRPC microservice based on docs V5, for testing the new feature for grpc microservices. I defined in the controller the grpc route using the GrpcRoute decorator.

When I try to handle the gRPC method from a gRPC client, show the next warning and not resolve the request:

(node:317) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 3): TypeError: rxjs_1.of is not a function

Expected behavior

The grpc method should resolve the request.

Minimal reproduction of the problem with instructions

import 'dotenv/config'
import { join } from 'path'
import { Logger } from '@nestjs/common'
import { Transport } from '@nestjs/microservices'
import { NestFactory } from '@nestjs/core'
import { ApplicationModule } from './modules/ApplicationModule'

async function bootstrap () {
  const port = Number(process.env.PORT) || 50051
  const app = await NestFactory.createMicroservice(ApplicationModule, {
    transport: Transport.GRPC,
    options: {
      url: `0.0.0.0:${port}`,
      package: 'article',
      protoPath: join(__dirname, './Article.proto')
    }
  })

  await app.listenAsync()
}

bootstrap()

import { Controller } from '@nestjs/common'
import { GrpcRoute } from '@nestjs/microservices'
import { EmptyInterface } from '../interfaces/EmptyInterface'
import { ArticleResponseInterface } from '../interfaces/ArticleResponseInterface'

@Controller()
export class ArticleController {

  @GrpcRoute('Article', 'CreateArticle')
  createArticle (data: EmptyInterface, metadata: any): ArticleResponseInterface {
    const postId = '40050'
    return { postId }
  }

}

What is the motivation / use case for changing the behavior?

The exposed grpc microservice should resolve the specified routes on controller based on protofile. Without expose a HTTP Serve, only GRPC Serve.

Environment

Nest version: 5.0.0-rc.2
 
For Tooling issues:
- Node version: v8.4.0
- Platform:  Mac

Others:
Yarn: 1.5.1

[kamilmysliwiec]

Fixed locally, I’ll push updated docs soon.

[kamilmysliwiec]

Actually, leaving this opened to do not forget about updating the migration guide.