Is it possible to deprecate a union member?

[vecerek]

Hello 👋
I would like to ask if it's currently possible to deprecate a member of a union similarly to deprecating a member of an enum? Suppose we have the following union:

const Event = unionType({
  name: "Event",
  definition(t) {
    t.members(
      EventA,
      EventB,
    );
    t.resolveType((item) => item["__typename"]);
  },
});

const EventA = objectType({
  name: "EventA",
  deprecation: "Replaced by EventB", // this doesn't work
  definition(t) {
    t.field("someField", { type: SomeType });
  },
});

const EventB = objectType({
  name: "EventB",
  definition(t) {
    t.boolean("someOtherField");
  },
});

With enums we could just do the following but not with unions as far as I know:

const MyEnum = enumType({
  name: "MyEnum",
  members: [
    { name: "EnumA", deprecation: "Replaced by EnumB" },
    "EnumB",
  ],
});

[tgriesser]

It is not, but only because this is not supported by GraphQL / graphql-js. If this changes in the spec we will add this behavior to nexus, but at present it is out of scope for the library.

Related: graphql/graphql-spec#197 (comment)

[tiago-loureiro]

Hi @tgriesser - going through the issues, it seems like it is now graphql/graphql-spec#525 - would it make sense to revisit it?