我在NestJS项目中定义了很多服务。其中一些服务在很多其他服务中被用作公共服务。因此它们也被导入到一些模块中。但我注意到，当特定服务srvD被导入到另一个服务srvE2中时，onModuleInit在项目启动时不会被调用。
项目启动时没有任何错误。不确定发生了什么。
项目结构的示例。发布格式为srvE2
srvA.ts

@Injectable()
export class SrvA {
  constructor(
    private somePkgSrv: SomePkgSrv,
  ) {}
}

srvB.ts

@Injectable()
export class SrvB {
  constructor(
    private srvA: SrvA,
  ) {}
}

srvC.ts

@Injectable()
export class SrvC {
  constructor(
    private srvA: SrvA,
    private srvB: SrvB,
  ) {}
}

srvD.ts

@Injectable()
export class SrvD {
  constructor(
    private srvA: SrvA,
    private srvB: SrvB,
    private srvC: SrvC,
  ) {}
}

srvD.module.ts

@Module({
  providers: [SrvA, SrvB, SrvC, SrvD],
  exports: [SrvD],
})

srvE1.ts

export class SrvE1 implements OnModuleInit {
  constructor(
    private srvA: SrvA,
    private srvB: SrvB,
    private srvC: SrvC,
  ) {}

  async onModuleInit() {
    console.log ('I can print! Yay!')
  }
}

srvE2.ts

export class SrvE2 implements OnModuleInit {
  constructor(
    private srvA: SrvA,
    private srvB: SrvB,
    private srvC: SrvC,
    private srvD: SrvD,
  ) {}

  async onModuleInit() {
    console.log ('I refuse to print so long as SrvD is here. Comment it and I will             
    print')
  }
}

srvE.module.ts

@Module({
  import: [SrvD], // the module
  providers: [SrvE1, SrvE2], // the services
  exports: [SrvE1, SrvE2],
})