Apollo Subgraph Utilities

This package provides utilities for creating GraphQL microservices, which can be combined into a single endpoint through tools like Apollo Gateway.

For complete documentation, see the Apollo Subgraph API reference.

Usage

const { ApolloServer, gql } = require("apollo-server");
const { buildSubgraphSchema } = require("@apollo/subgraph");

const typeDefs = gql`
  type Query {
    me: User
  }

  type User @key(fields: "id") {
    id: ID!
    username: String
  }
`;

const resolvers = {
  Query: {
    me() {
      return { id: "1", username: "@ava" }
    }
  },
  User: {
    __resolveReference(user, { fetchUserById }){
      return fetchUserById(user.id)
    }
  }
};

const server = new ApolloServer({
  schema: buildSubgraphSchema([{ typeDefs, resolvers }])
});

Current Tags

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• 0.1.0                                ...           5 years ago