GraphQL 

for the impatient

Julián Duque

Lead Developer Advocate @ Heroku

https://twitch.tv/julianduque - @julian_duque

Introduction

GraphQL

• Query and manipulation language specification for APIs
  • Just one API endpoint
  • Multiple queries defined by a schema
• Alternative to REST
• Developed by Facebook in 2012
• Released to the public in 2015

Schema & Types

Scalar Types

• Int: A signed 32-bit integer
• Float: A signed double-precision floating-point value
• String: A UTF-8 character sequence
• Boolean: true or false
• ID: A scalar representing a unique identifier
• Custom scalars can also be created, examples are:
  • Date
  • JSON

Object Types

Queries & Mutations

Queries

Mutations

Resolvers

Query Resolvers

Mutation Resolvers

Running GraphQL

Apollo Server

Thank You! 😄