Extending an Object Type in Code

(Posting here since haven’t been able to get an answer from any other of channels. 😅)

So, using SDL you can add fields to an existing type like:

extend type Query {
   extraField: Int!
}

But how can I do this in code using the built-in classes (GraphQLObjectType, etc)?

Sounds like extendSchema might offer a way, but it is undocumented and I’m not sure how to use it in this case.

Is this supported?

My apologies in advance if I’m missing something really obvious.

[sibelius]

can we reopen this?

as extendSchema only works with SDL and not with graphql-js types?

[tot-ra]

+1, wanna reference external type for apollo federation as a plain string, but don’t see other way than low-level string replace atm