How to make an argument optional?

[tippfelher]

My code

  @Query(returns => [Post], { description: "" })
  async posts(
    @Arg("order") order?: PostOrder
  ): Promise<Post[]> {
  }

Problem: Argument is not made optional. Schema generated:

type Query {
  posts(order: PostOrder!): [Post!]!
}

Expected: order can be undefined

Not a solution: Marking order as nullable because null is obviously not undefined.

[MichalLytek]

Have you tried { nullable: true }, just like with fields, queries and mutations?

https://github.com/MichalLytek/type-graphql/blob/master/examples/enums-and-unions/resolver.ts#L17

[tippfelher]

I haven't tried it before I asked my question, because nullable is not what I want.

However, I did try it now and it does exactly what I expected. With your method,

order is of type PostOrder | null | undefined

but I want

order is of type PostOrder | undefined

Thanks

[tippfelher]

I just realized that this may be a graphql limitation and I can't do anything against it.