index.js

const { Neo4jGraphQL } = require("@neo4j/graphql");
const { ApolloServer } = require("apollo-server");
const neo4j = require("neo4j-driver");
const fs = require("fs");
const dotenv = require("dotenv");
const path = require("path");

// Load contents of .env as environment variables
dotenv.config();

// Load GraphQL type definitions from schema.graphql file
const typeDefs = fs
  .readFileSync(path.join(__dirname, "schema.graphql"))
  .toString("utf-8");

// Create executable GraphQL schema from GraphQL type definitions,
// using @neo4j/graphql to autogenerate resolvers
const neoSchema = new Neo4jGraphQL({
  typeDefs,
  debug: true,
});

// Create Neo4j driver instance
const driver = neo4j.driver(
  process.env.NEO4J_URI,
  neo4j.auth.basic(process.env.NEO4J_USER, process.env.NEO4J_PASSWORD)
);

// Create ApolloServer instance that will serve GraphQL schema created above
// Inject Neo4j driver instance into the context object, which will be passed
//  into each (autogenerated) resolver
const server = new ApolloServer({
  context: { driver, driverConfig: { database: process.env.NEO4J_DATABASE } },
  schema: neoSchema.schema,
  introspection: true,
  playground: true,
});

// Start ApolloServer
server.listen().then(({ url }) => {
  console.log(`GraphQL server ready at ${url}`);
});