[Question] async/await or Promises in @Field decorator

[CoonHouse]

Thanks for your great tutorial!

I have in my "User-entity" a field like the "name" field you create at about minute 2:30 of video 3, but I am returning a value from Redis. So it is actually returning a promise in stead of a string. It is working, but I get an TypeScript error saying:

"Type 'Promise<string | null>' is not assignable to type 'string'."

  @Field()
  userName(@Root() parent: User): string {
    return redis.get(usernamePrefix + parent._id)
  }

Do you know how to properly return the Redis output?
So, it is working, I am just wondering if there is a better way or how to get rid of the TypeSript Error.

Thanks and regards,

Wilco

[MichalLytek]

@CoonHouse

  @Field(type => String, { nullable: true })
  userName(@Root() parent: User): Promise<string | null> {
    return redis.get(usernamePrefix + parent._id)
  }

[CoonHouse]

@19majkel94
Thanks! that did it!
I only get the TypeScript error:

'type' is declared but its value is never read.

Wilco

[MichalLytek]

@CoonHouse
_type => String

You should check your tsconfig.json and find out what the flags like noUnusedParameters do.

[CoonHouse]

@19majkel94
Thank you!
Yes, I have noUnusedParameters set to true because it makes sense to me, not to include parameters that are not used. Isn't it? Would you recommend to turn it off?

Regards,

Wilco

[MichalLytek]

Would you recommend to turn it off?

No, you just need to know what it checks, how it checks and how to suppress the error (using _).