nayaabkhan / nexus-federation-example

Example of using Apollo Federation and Nexus JS

How to run

1. Install dependencies: yarn
2. Start all services and the gateway: yarn start

Looking for a Schema Stitching example? Check it at https://github.com/nayaabkhan/nexus-stitching-example.

nexus-federation-example's Issues

Thanks for the example

Hey thanks a lot for the example!!!

I'm trying to do this with Prisma and it's a bit unclear on some points as I can't find an example that uses a real DB.

I'm trying to connect to an external type. and put it in another type.

For example:

user now contains products. Each is in a separate DB on a separate service.

I can't figure out how to use resolveReference, or even how to resolve the data fetching.

Here's my code:

Schema.ts

onst federatedSchema = applyMiddleware(
  transformSchemaFederation(schema, {
    Query: {
      extend: true,
    },
    Mutation: {
      extend: true,
    },
    User: {
      keyFields: ['id'],
    },
    Product: {
      // extend Product {
      extend: true,
      // Product @key(fields: "id") {
      keyFields: ['id'],
      fields: {
        id: {
          external: true,
        },
      },
      // resolveReference({ id }: any, context: Context, info) {
      //   return delegateToSchema({
      //     schema: info.schema,
      //     operation: 'query',
      //     fieldName: 'productById',
      //     args: {
      //       id,
      //     },
      //     context,
      //     info,
      //   });
      // },
    },
  }),
  permissions
);

Product.ts

import { objectType } from 'nexus';
import { product as TypeName } from './typeNames';

export const User = objectType({
  name: TypeName,
  definition(t) {
    t.string('id');
  },
});

User.ts

import { objectType } from 'nexus';
import { user as TypeName, product } from './typeNames';

export const User = objectType({
  name: TypeName,
  definition(t) {
    t.model.id();
    t.model.createdAt();
    t.model.updatedAt();
    t.model.firstName();
    t.model.lastName();
    t.list.field('products', { type: product });  },
});