NestJS · Junior · Question 74 of 75

Why use `TypeOrmModule.forRootAsync({ useFactory, inject: [ConfigService] })` instead of `forRoot({...})`?

1forRoot is deprecated and removed
2forRootAsync connects to several databases at once
✓Correct answer: The connection options can then come from injected services like ConfigService instead of being hard-coded

Explanation

Async configuration is a common pattern for dynamic modules: the factory runs after its dependencies are ready.

Further reading

Test yourself

Take the NestJS · Junior quiz: questions and options are shuffled, and you get a review of your mistakes at the end.