Type extension not in the AST

[mitchellsimoens]

If I have the follow schema:

type Query {
  version: String!
  name: String!
}

extend type Query {
  hello: String!
}

When I try to build an AST it doesn't contain the hello field. Debugging and I get into the buildASTSchema I do see the field in the documentAST.definitions[1].fields array but within the for loop of buildASTSchema I see it never handles the ObjectTypeExtension kind. I do see #922 talking about something similar but I don't see why the extensions cannot be properly merged together in the result even if the fields aren't all merged together and it just has an extensions key in the type.

For a full example (along with the IntrospectionQuery I'm using): https://gist.github.com/mitchellsimoens/eaa0579b07772aabf8d9c876cd2cd6d2

[IvanGoncharov]

I do see #922 talking about something similar but I don't see why the extensions cannot be properly merged together in the result even if the fields aren't all merged together and it just has an extensions key in the type.

Yes, I fully agree that extensions should be merged and I'm working on this.
ATM buildSchema/extendSchema implementation is under heavy refactoring you can see it here:
https://github.com/graphql/graphql-js/commits/master/src/utilities

So this will be fixed in one of the next releases, probably 15.0.0. Meanwhile, progress is tracked under #922.

[IvanGoncharov]

As a temporary workaround, you can filter out extensions in a separate document and pass it to extendSchema.