Inject nestjs service from another module

Question

I\'ve got a PlayersModule and an ItemsModule.

I want to use the ItemsService in the PlayersService.

When

Answer 1

You have to export the ItemsService in the module that provides it:

@Module({
  controllers: [ItemsController],
  providers: [ItemsService],
  exports: [ItemsService]
  ^^^^^^^^^^^^^^^^^^^^^^^
})
export class ItemsModule {}

and then import the exporting module in the module that uses the service:

@Module({
  controllers: [PlayersController],
  providers: [PlayersService],
  imports: [ItemsModule]
  ^^^^^^^^^^^^^^^^^^^^^^
})
export class PlayersModule {}

⚠️ Do not add the same provider to multiple modules. Export the provider, import the module. ⚠️

Answer 2

I believe that you faced the same problem i had. My scenario was 2 sibling custom modules (user, auth) that needed to use each other's services. I used circular DI to solve it. please check this link

Let me know whether if it solved your issue, maybe I can advise you further.

Answer 3

I solved this problem my removing @Inject() from the argument in my constructor that was passing the exported service.