GraphQL Crash Course

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GraphQL Pros and Cons, examples and when to use over REST

GraphQL is an open source query language developed by facebook that allows clients to formulate queries to get different results. Its main goal is to combine multiple services into one endpoint. In this video we will discuss what is GraphQL, why facebook developed it, go through some examples using github GraphQL API, finally we will discuss the pros and cons and when you should use this technology.

What is GraphQL?
Examples
Pros and Cons
when to use REST vs GRAPHQL

What is GraphQL
Schema
Query language
Nesting
Mutation and subscription

Examples
Schema intro
Github API
Rest api


Pros
Flexibility
efficient response : payload back only get what you want of fields since you know the schema
No round trips- Avoiding multiple round trips (HATEOS REST)
Uniform single interface API endpoint
Self documenting

Cons
Complexity
Typed system - ( use it to know if a type is available or not and fork logic) slows down adoption.. same as soap
No Caching etag since always POST
Error management non-standard for HTTP.
Over engineering can lead to Inefficiency of the joins can lead to performance and DOS


https://developer.github.com/v4/guide...


WHEN TO USE GRAPHQL
Public ad-hoc API that you can’t predict how it will be used
Specific and well-design use cases API
Simple API that serves one client (webpage)
Enterprise API (new york times)
Well defined schema

Without the need of performing multiple round trips. It as a reaction to certain limitations of the REST API.

Schema

all post
except schema call get


via fetch api



Source Code for RESTAPI vs GraphQL

https://github.com/hnasr/javascript_p...




Jump Codes
2:30 What is GraphQL?
13:50 Properties of GraphQL
18:00 Examples
34:00 Pros and Cons
47:10 When to use GraphQL over REST




Cards
4:00 REST API
31:20 GIT HUB REST API
33:00 Caddy Web Server
43:55 GET VS POST




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Hussein