nest service 在添加`@Injectable`或者`@InjectRepository`后 OnModuleInit失效，请问为什么？如何解决？

Question

1. 可正常执行 onModuleInit 生命周期

// @Injectable()
export class TestService implements OnModuleInit, OnApplicationBootstrap {
  constructor(
    // @InjectRepository(Detail)
    // private detailRepository: Repository<Detail>,
  ) {}

  async onModuleInit() {
    console.log('onModuleInit: this.detailRepository');

  }

2. 放开Injectable，不可正常执行 onModuleInit 生命周期

@Injectable()
export class TestService implements OnModuleInit, OnApplicationBootstrap {
  constructor(
    // @InjectRepository(Detail)
    // private detailRepository: Repository<Detail>,
  ) {}

  async onModuleInit() {
    console.log('onModuleInit: this.detailRepository');

  }

3. 放开InjectRepository，不可正常执行 onModuleInit 生命周期

// @Injectable()
export class TestService implements OnModuleInit, OnApplicationBootstrap {
  constructor(
    @InjectRepository(Detail)
    private detailRepository: Repository<Detail>,
  ) {}

  async onModuleInit() {
    console.log('onModuleInit: this.detailRepository');

  }