MongooseCoreModule unable to resolve ModuleRef from injection container

Did you read the migration guide?

I have read the whole migration guide

Is there an existing issue that is already proposing this?

I have searched the existing issues

Potential Commit/PR that introduced the regression

No response

Versions

7.x -> 9

Describe the regression

I have made it all the way through the migration process up to the point where I'm trying to test in my local environment. When I start the application is gives me this error:

ERROR [ExceptionHandler] Nest can't resolve dependencies of the MongooseCoreModule (MongooseConnectionName, ?). Please make sure that the argument ModuleRef at index [1] is available in the MongooseCoreModule context.

Minimum reproduction code

MongooseModule.forRootAsync({
  imports: [EnvModule], // a module importing classes that validate the environment variables
  useClass: ConfigService,
  connectionName: "dbname",
})

Expected behavior

Application shouldn't error on startup

Other

I'm completely lost as to what the problem could be.

Please provide a minimum reproduction repository.

This seems to be the issue: https://discord.com/channels/520622812742811698/527863537708695562/888102356615569418

Reopening on further investigation. We believe that adding the @Inject token to the MongooseCoreModule line here:

mongoose/lib/mongoose-core.module.ts

Line 30 in abd3725

private readonly moduleRef: ModuleRef,

to be @Inject(<token for ModuleRef>) private readonly moduleRef: ModuleRef will remedy an issue with that class not knowing how to find it's dependency when pulled in under a monorepo scenario.

We believe this might be related skunight/nestjs-redis#82 (comment)

We believe that adding the @Inject token to the MongooseCoreModule line here:

Adding @Inject() won't help here.

Just make sure that all @nestjs packages are installed as peer dependencies. Please search through some of our old issues on this (this has been discussed several times in the past).