Node.js Tech Talks - How to use GraphQL for an app bigger than a to-do list

This is demo app that shows how to use GraphQL with:

• DataLoaders github
• Automatic persisted queries
• Cache hints

How to use it

First install required dependencies locally using npm ci. Then use Docker to start everything up: docker-compose up. It will setup Postgres database with initial schema and data, server app and client app.

http://localhost:3000 - Server app

GraphQL Server that retrieves data from Postgres Database

You can use GraphqQL Playground http://localhost:3000/graphql to query sample data

{
  categories {
    id
    name
    products {
      id
      name
      description
    }
  }
}

Server app logs basic info of every request (method, url, body) and requests made to database.

http://localhost:8080 - Client app

Simple client built with Webpack that uses Apollo Client to fetch data from server and displays data in json format

Used packages

Server app

• koa
• apollo-server-koa
• graphql
• knex

Client app

• graphql
• apollo-client
• apollo-cache-inmemory
• apollo-link-http
• graphql-tag
• webpack