Schema Transforms

0_service.graphql

type User {
  _id: ID!
  username: String
  blogs: [Blog]
}

type Blog {
  _id: ID!
  user: User
  title: String!
  text: String
}

type Query {
  userById(id: ID!): User
  blogById(id: ID!): Blog
}

1_gateway.graphql

interface Node {
  id: ID!
}

extend type User implements Node {
  id: ID!
}

extend type Blog implements Node {
  id: ID!
}

extend type Query {
  node(id: ID!): Node
}