GraphQL Tutorial

This is a didactic introduction to GraphQL, starting from a simple Hello World to a network-based GraphQL server with a built-in GraphQL UI. It is provided in the form of a tutorial which step-by-step introduces more usage of GraphQL. Each tutorial step XX can be found in the file sample-XX and run with npm run sample-XX. The distinct tutorial steps are:

1. just plain all-in-one GraphQL "Hello World"
2. replaces GraphQL schema API calls with GraphQL schema definition language
3. split GraphQL usage into distinct parts
4. replace "Hello World" with an entity "OrgUnit" and enable schema/resolver warnings
5. add "Person" entity and use a separate data store
6. factor out resolver functionality into generic data access object functions
7. add QueryEntityOne DAO method for querying particular objects
8. allow relationships to be queried and be strict on resolvers now
9. add remaining CRUD operations (create/clone, update, delete) to GraphQL entity types
10. wrap GraphQL application programming interface (API) with a remote network interface (RNI)
11. replace built-in client with interactive GraphQL web user interface (GraphiQL)
12. add descriptions to GraphQL schema for introspection inside GraphiQL
13. move data into SQLite RDBMS and access it with Sequelize ORM
14. wrap mutations into a single RDBMS transaction
15. support also GraphQL over Websocket communication
16. add GraphQL Subscription support
17. simplify and migrate to all-in-one GraphQL-IO framework

GraphQL Resources

The steadily growing GraphQL community has many resources. A few selected ones were hand-picked for you here.

GraphQL Community

• Awesome GraphQL [1]
  https://github.com/chentsulin/awesome-graphql

• Awesome GraphQL [2]
  https://github.com/joshblack/awesome-graphql

GraphQL General

• GraphQL Query & Schema Language: Learning
  http://graphql.org/learn/

• GraphQL Schema Language: Learning
  http://graphql.org/learn/schema/

• GraphQL Schema Language: Cheat Sheet
  https://wehavefaces.net/graphql-shorthand-notation-cheatsheet-17cd715861b6#.x5zncd650

• GraphQL Query Language Specification
  http://facebook.github.io/graphql/

Tools

• GraphiQL
  https://github.com/graphql/graphiql
  https://github.com/rse/hapi-plugin-graphiql

• ChromeiQL
  https://chrome.google.com/webstore/detail/chromeiql/fkkiamalmpiidkljmicmjfbieiclmeij

• GraphiCLI/Gest
  https://github.com/mfix22/graphicli

• GraphQL Network for Chrome
  https://chrome.google.com/webstore/detail/graphql-network/igbmhmnkobkjalekgiehijefpkdemocm

• GraphQLviz [1]
  https://github.com/sheerun/graphqlviz

• GraphQLviz [2]
  https://github.com/Macroz/GraphQLviz

• GraphQL Visualizer [3]
  http://nathanrandal.com/graphql-visualizer/

• GraphQLHub:
  https://www.graphqlhub.com/

• PostgraphQL
  https://github.com/calebmer/postgraphql

• DGraph
  https://dgraph.io/

Cloud Services

• GraphQL LaunchPad
  https://launchpad.graphql.com/

• GraphCool
  https://www.graph.cool/

Server SDK [JavaScript]

• GraphQL.js
  https://github.com/graphql/graphql-js

• GraphQL-Tools
  http://dev.apollodata.com/tools/
  https://github.com/apollostack/graphql-tools

• GraphQL-Tools Addons
  https://github.com/rse/graphql-tools-types
  https://github.com/rse/graphql-tools-sequelize
  https://github.com/rse/graphql-tools-subscribe

• HAPI Plugin for GraphiQL Integration
  https://github.com/rse/hapi-plugin-graphiql

Client SDK [JavaScript]

• Apollo Client [JavaScript]
  http://www.apollostack.com/
  http://dev.apollodata.com/

• Lokka [JavaScript]
  https://github.com/kadirahq/lokka

Server or Client SDK [Others]

• Sangria [Scala]
  http://sangria-graphql.org/

• GraphQL-Java [Java]
  https://github.com/graphql-java/graphql-java

• GraphQL-PHP [PHP]
  https://github.com/webonyx/graphql-php