Facing issues while using graphql-modules with Apollo Server V4

[sourabh-kumar]

I'm creating a GraphQL application using Apollo Server V4 and graphql-modules.

This is how I'm initialising the app

import { createApplication } from "graphql-modules";

import moduleA from "./moduleA";
import moduleB from "./moduleB";

export const gqlApp = createApplication({
    modules: [moduleA, moduleB]
});

And I'm initialising the Apollo server in the following way:

 const server = new ApolloServer<ContextValue>({
        schema: gqlApp.schema,
        plugins: [ApolloServerPluginDrainHttpServer({ httpServer })],
        includeStacktraceInErrorResponses: "production" !== process.env.NODE_ENV
    });

When I run the app, I get the following error in the response
context.ɵgetModuleContext is not a function

The only way I can make this work right now is if I generate my schema the following way:
schema: gqlApp.createSchemaForApollo()

But this seems to be marked as deprecated.

I'd appreciate if someone can help me in figuring out the right way of doing this.

[ardatan]

See here #2270

[sourabh-kumar]

This works. Thanks @ardatan

Even tested with the mocking mechanism recommended by Apollo

//.....

   const gqlSchemaWithMocks = addMocksToSchema({
        schema: gqlApp.schema,
        mocks: {
            ...someMock
        },
        preserveResolvers: true
    });

const server = new ApolloServer<ContextValue>({
        gateway: {
            async load() {
                return { executor: gqlApp.createApolloExecutor() };
            },
            onSchemaLoadOrUpdate(callback) {
                callback({ apiSchema: gqlSchemaWithMocks } as any);
                return () => {};
            },
            async stop() {}
        },
        plugins: [ApolloServerPluginDrainHttpServer({ httpServer })],
        includeStacktraceInErrorResponses: "production" !== process.env.NODE_ENV
    });

//.....

There is mention of the gateway and executor in Apollo's documentation and the graphql-module's official documentation explains it w.r.t Apollo V3's executor implementation.

But neither of the docs talk about this way of adding the gateway.

It'd be good to get this added to the official docs.