Can't inject service into global guard/interceptor with Scope.REQUEST

I’m submitting a…

[ ] Regression 
[X] Bug report
[ ] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead post your question on Stack Overflow.

Current behavior

When i try to inject a dependency (or sub-dependency) with Scope.REQUEST to a guard or interceptor, the constructor never gets called.

The guard itself is marked as injectable with request scope:

@Injectable({scope: Scope.REQUEST})
export class SessionGuard implements CanActivate {
    constructor(private sessionService: SessionService) {}
}

All global guards and interceptors are defined as providers in my app.module.ts (multiple each)

{
    provide: APP_GUARD,
    useClass: SessionGuard,
},
{
    provide: APP_INTERCEPTOR,
    useClass: MockingInterceptor,
}

Also tried useFactory with inject instead of useClass, but same result.

When i add Scope.REQUEST to my SessionService, the constructor never gehts called, all injected services are undefined. When i remove the @Injectable() (or just the scope property), the injection"works": the constructor is called with the injected service(s). BUT: the constructor is only called once, at app startup.

Expected behavior

The injection works for middlewares (tried same services as for my guards). Middlewares are also defined in app.module.ts: consumer.apply(SomeMiddleware).forRoutes('/'); also: the middleware constructor gets called on every request - as i would expect.

What is the motivation / use case for changing the behavior?

Is there a reason why request-scope dependency injection is not working with guards/interceptors but with middlewares? Can’t use middlewares for this case, cause i need access to the execution context We’re migrating a large codebase with lots of request based logic, so we would need this functionality to use NestJS DI for our whole app.

Environment

Nest version: 6.1.1

[hovonako]

The same to me this issue tested version: 6.1.1

[lock[bot]]

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