Reasonable GraphQL

@VladimirNovick

GDE & Independent Consultant

Web / Mobile / VR / AR / IoT

vnovick.com

REST vs GraphQL

https://swapi.co/api/planets/1

https://swapi.co/api/species/1

https://swapi.co/api/vehicles/1

https://swapi.co/api/films/1

https://swapi.co/api/people/1

https://swapi.co/api/spaceships/1

REST in ReasonML

Fetching...

bs-fetch

Decoding...

bs-json

So where is the problem?

It's demo time

Why REST is bad?

  • No knowledge of data types
  • Even minor changes can introduce breaking changes
  • No stability

GraphQL

A query language for your API

GraphQL SDL

Resolvers

It's demo time

How we can get started

Installations

Send Introspection query

saves graphql_schema to disk

Create Apollo client

Wrap component with Provider

Define query by using graphql_ppx

Create query component

Wrap UI in created query component

Treat all optional types

It's demo time

It's demo time

Authentication

Tips and Tricks

use jsConverter

use bsRecord

https://github.com/jaredly/get_in_ppx

Thank You

@VladimirNovick

GraphQL in ReasonML

By vladimirnovick

GraphQL in ReasonML

ReasonML and GraphQL is a match made in heaven. Imagine getting type error if you have mistake in your GraphQL type even before compiling your client code. How cool is that? In this talk we will see how you can use GraphQL with Reason and what benefits it will bring.

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