Cannot query field "_service" on type "Query"

I’m using Apollo Federation to connect to a GraphQL server made with Drupal GraphQL.

So I configured the gateway:

const { ApolloServer } = require("apollo-server");
const { ApolloGateway } = require("@apollo/gateway");

const gateway = new ApolloGateway({
  serviceList: [
    { name: 'content', url: 'http://gims_content_nginx/content' }
  ]
});

(async () => {
  const { schema, executor } = await gateway.load();

  const server = new ApolloServer({ schema, executor });

  server.listen().then(({ url }) => {
    console.log(`🚀 Server ready at ${url}`);
  });
})();

But when I start the server I get:

{ message: 'Cannot query field "_service" on type "Query".',
  extensions: { category: 'graphql' },
  locations: [ { line: 1, column: 30 } ] } 0 [ { message: 'Cannot query field "_service" on type "Query".',
    extensions: { category: 'graphql' },
    locations: [ [Object] ] } ]
(node:1) UnhandledPromiseRejectionWarning: Error: Apollo Server requires either an existing schema, modules or typeDefs
    at ApolloServer.initSchema (/usr/src/app/node_modules/apollo-server-core/dist/ApolloServer.js:239:23)
    at new ApolloServerBase (/usr/src/app/node_modules/apollo-server-core/dist/ApolloServer.js:201:30)
    at new ApolloServer (/usr/src/app/node_modules/apollo-server-express/dist/ApolloServer.js:58:9)
    at new ApolloServer (/usr/src/app/node_modules/apollo-server/dist/index.js:23:9)
    at /usr/src/app/gateway.js:13:18
    at process._tickCallback (internal/process/next_tick.js:68:7)
(node:1) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:1) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

[mwawrusch]

Running into this issue now with faunadb downstream. Very annoying.

[luijar]

FYI for anyone stumbling into this and trying to figure it out. That project is out of date and doesn’t work with latest Apollo libraries. I’m going to try to take that and see if I can re-engineer it so that I can federate over an existing schema (which I can’t change) with latest Apollo server + Gateway