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Getting started

Prerequisites​

To use Inversify GraphQL, you need to have an Inversify HTTP server set up. Please refer to the HTTP Getting Started guide for instructions on how to set up an HTTP server.

Install dependencies​

Install the required packages:

npm install @inversifyjs/apollo-express @inversifyjs/apollo-core @apollo/server graphql

Create a GraphQL Server​

You can create a GraphQL server using ApolloExpressServerContainerModule.

@injectable()
class QueryResolvers {
  public hello(): string {
    return 'Hello World!';
  }
}

@injectable()
class AppResolvers {
  // eslint-disable-next-line @typescript-eslint/naming-convention
  public readonly Query: QueryResolvers;

  constructor(@inject(QueryResolvers) queryResolvers: QueryResolvers) {
    this.Query = queryResolvers;
  }
}

const typeDefs: string = `
  type Query {
    hello: String
  }
`;

const container: Container = new Container();

await container.load(
  ApolloExpressServerContainerModule.graphServerFromOptions(
    {
      controllerOptions: {
        path: '/graphql',
      },
      getContext: async () => ({}),
    },
    {
      resolverServiceIdentifier: AppResolvers,
      typeDefs,
    },
  ),
);

container.bind(QueryResolvers).toSelf();
container.bind(AppResolvers).toSelf();

const adapter: InversifyExpressHttpAdapter = new InversifyExpressHttpAdapter(
  container,
);
await adapter.build();

const inversifyApolloProvider: InversifyApolloProvider<http.Server> =
  await container.getAsync(inversifyApolloProviderServiceIdentifier);

await new Promise<void>((resolve: () => void) => {
  inversifyApolloProvider.server.listen(3000, () => {
    resolve();
  });
});

console.log(`Server is running on http://localhost:3000`);