Nestjs | ConfigModule | Use (or inject) a service inside `validate` function

user_9396198 0
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import { validate } from './env.validation';

@Module({
  imports: [
    ConfigModule.forRoot({
      validate,
    }),
  ],
})
export class AppModule {}

How can I use some service from within validate function? For example a Logger service?
Can a service be injected into validate?

nestjs-config nestjs node.js
2 Answers

as you could see in it source code here there is no way to inject providers in this validate function because it is just a conventional callback that doesn't know about the Nest DI system.

user_52904470

Heading

In your case, I would build a class to implement ValidatorConstraintInterface, which is from class-validator. Then, you can use the answer from this issue to inject dependencies: https://github.com/nestjs/nest/issues/528

TL:DR use this on your bootstrap() and implement the ValidatorConstraintInterface, so you can inject dependencies:

useContainer(app.select(AppModule), {fallbackOnErrors: true});

user_117263990
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