Hello, I've started using Prisma and I have a rather dumb question. Following this example:

type Human {
  id: ID! @unique
  brain: Brain
}

type Brain {
  id: ID! @unique
  human: Human!
}

This is an optional one-to-one relation, how should I check the existence of this relation from Human perspective ? I did:

const brain = await prisma.human({ id }).brain()    
if (!brain) { ... }

But the typing is not correct,

brain

is of type

Brain

, and not

Brain | undefined

Am I doing something wrong ? Thanks 😃

That looks like an error from your server, not Prisma. How are you generating your types? If it's

graphqlgen

, try regenerating the types, especially if you recently changed the schema to allow humans to not have brains. 🤣

I use Prisma CLI,

prisma generate

to generate TypeScript client

So is your server not running Typescript?

I use VSCode, and restarted TS server already

Have you looked at the types file to make sure

brain: Brain | undefined

?

Types file looks incorrect indeed

It could be, and not uncommon. Can you post the Human type?

export interface HumanPromise extends Promise<Human>, Fragmentable {
  id: () => Promise<ID_Output>;
  brain: <T = BrainPromise>() => T;
}

^ return type of

.human(...)

So it looks like it's not generating a brain field

Looks like a reasonable solution

@divyendu can you take a look here? 🙂

Hey, it looks like you are running into this issue: https://github.com/prisma/prisma/issues/3774 I will get this validated and get back to you later.

👍

This indeed looks like a bug, please track the same GH issue for a resolution 👍

Thanks @divyendu