GraphQL enum union workaround?

Question

I have Major categories and Minor Categories that belong to a Major category. Both are ENUM type. I want client to choose matching minor category ENUM to submit with its Major category. I don't want to include all different minor category ENUMs as fields.

I first tried doing union MinorCategories = Minor1 | Minor2 However this failed because union only works with ObjectTypes

Enforcing minor category depending on the major category is not necessary. I only want to receive one field that can be selective by the client by ENUM. Is there any work around?

Answer 1

GraphQL does not support union types for scalar values, only for object types. One option, albeit an ugly one, is to wrap your enums in an object type.

type Minor1Wrapper {
  value: Minor1!
}

type Minor2Wrapper {
  value: Minor2!
}

union MinorCategories = Minor1Wrapper | Minor2Wrapper