Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Introduction to GraphQL
Search
Adrián Matellanes
September 23, 2017
Programming
4
880
Introduction to GraphQL
Learn about GraphQL, how it works, and how to use it.
Adrián Matellanes
September 23, 2017
Tweet
Share
More Decks by Adrián Matellanes
See All by Adrián Matellanes
Test-Driven Development
amatellanes
2
120
Practical Monitoring
amatellanes
0
82
Making code compatible with Python 2 and 3
amatellanes
0
1.2k
Python Gotchas
amatellanes
3
1.6k
Cómo construir un API del que tus padres se sientan orgullosos
amatellanes
4
1.2k
Unicode: WTF?
amatellanes
1
960
Málaga Python Meetup
amatellanes
0
160
Other Decks in Programming
See All in Programming
Claude Codeで実装以外の開発フロー、どこまで自動化できるか?失敗と成功
ndadayo
4
1.8k
兎に角、コードレビュー
mitohato14
0
170
testingを眺める
matumoto
1
130
1から理解するWeb Push
dora1998
1
260
パッケージ設計の黒魔術/Kyoto.go#63
lufia
3
400
ECS初心者の仲間 – TUIツール「e1s」の紹介
keidarcy
0
150
さようなら Date。 ようこそTemporal! 3年間先行利用して得られた知見の共有
8beeeaaat
0
240
Processing Gem ベースの、2D レトロゲームエンジンの開発
tokujiros
2
120
機能追加とリーダー業務の類似性
rinchoku
0
360
AIレビュアーをスケールさせるには / Scaling AI Reviewers
technuma
2
240
AIを活用し、今後に備えるための技術知識 / Basic Knowledge to Utilize AI
kishida
19
4.2k
Honoアップデート 2025年夏
yusukebe
1
900
Featured
See All Featured
Automating Front-end Workflow
addyosmani
1370
200k
Fantastic passwords and where to find them - at NoRuKo
philnash
52
3.4k
Art, The Web, and Tiny UX
lynnandtonic
302
21k
Agile that works and the tools we love
rasmusluckow
330
21k
Designing for Performance
lara
610
69k
Measuring & Analyzing Core Web Vitals
bluesmoon
9
570
[Rails World 2023 - Day 1 Closing Keynote] - The Magic of Rails
eileencodes
36
2.5k
Why You Should Never Use an ORM
jnunemaker
PRO
59
9.5k
The Pragmatic Product Professional
lauravandoore
36
6.8k
Faster Mobile Websites
deanohume
309
31k
ReactJS: Keep Simple. Everything can be a component!
pedronauck
667
120k
The Psychology of Web Performance [Beyond Tellerrand 2023]
tammyeverts
49
3k
Transcript
Introduction to GraphQL
GET https://2017.es.pycon.org/speakers/me { "name": "Adrián Matellanes", "roles": [ "Lead API
Developer", "Málaga Python Organizer" ], "worksAt": "Ebury", "twitter": "@_amatellanes", "github": "github.com/amatellanes" }
What’s GraphQL?
A programming language
A special type of database
A library
A Query Language for APIs
Why GraphQL?
Due to the nature of REST
REST Problems
GET /characters/1 { "name": "Jon Snow" }
"url": "http://anapioficeandfire.com/api/characters/583", "name": "Jon Snow", "culture": "Northmen", "born": "In 283
AC", "titles": [ "Lord Commander of the Night's Watch" ], "aliases": [ "Lord Snow", "Ned Stark's Bastard", "The Snow of Winterfell", "The Bastard of Winterfell", "Lord Crow" ], "allegiances": [ "http://anapioficeandfire.com/api/houses/362" ], "books": [ "http://anapioficeandfire.com/api/books/5" ], "povBooks": [ "http://anapioficeandfire.com/api/books/1", "http://anapioficeandfire.com/api/books/2", "http://anapioficeandfire.com/api/books/3", "http://anapioficeandfire.com/api/books/8"
Round Trip and Repeat Trip Times
None
/episodes/1
/episodes/1 /characters/345 /characters/563 /characters/802 /characters/441 /characters/674
/episodes/1 /characters/345 /characters/563 /characters/802 /characters/441 /characters/674 /reviews/3512
Over/Under Fetching
/episodes/1?fields=characters(name,playedBy)
/episode_with_all_stuff /episode_with_amazing_pictures /episode_with_stuff_i_need_today /episode_with_stuff_for_mobile_app /episode_with_actors_and_reviews_and_images /episode_with_stuff_for_mobile_app_v2 /episode_with_actors_and_reviews_but_no_images
/episode_with_all_stuff /episode_with_amazing_pictures /episode_with_stuff_i_need_today /episode_with_stuff_for_mobile_app /episode_with_stuff_for_mobile_app_v2 /episode_with_actors_and_reviews_and_images /episode_with_actors_and_reviews_but_no_images
None
https://code.facebook.com/projects/
Created July 1, 2015 Updated September 20, 2017 381 Forks
6,078 Stars 302 Commits 82 Open Issues https://github.com/facebook/graphql
None
“You will receive what you ask for no more, no
less.” - Mark Allen
None
None
None
None
None
None
None
None
None
None
None
GraphQL vs. REST
REST Model
Client /books /characters /houses Databases Services External APIs
GraphQL Model
Client Databases Services External APIs /graphql/
Anatomy of a GraphQL
{ me { name } }
{ me { name } } { "me": { "name":
"Jon Snow" } }
Scalar types
Int Float String Boolean ID Date enum
GraphQL Schema Definition Language
type Query { allCharacters: [Character]! character(id: ID!): Character }
type Query { allCharacters: [Character]! character(id: ID!): Character } Root
Type
type Query { allCharacters: [Character]! character(id: ID!): Character } Root
Fields
type Query { allCharacters: [Character]! character(id: ID!): Character } Arguments
type Query { allCharacters: [Character]! character(id: ID!): Character } Return
Types
type Character { name: String! house: House! } type House
{ name: String! words: String! members: [Character]! }
type Character { name: String! house: House! } type House
{ name: String! words: String! members: [Character]! } Object Type
type Character { name: String! house: House! } type House
{ name: String! words: String! members: [Character]! } Fields
type Character { name: String! house: House! } type House
{ name: String! words: String! members: [Character]! } Return Types
Queries for fetching data from the server
query CharactersNameAndHouse { allCharacters { name house { words }
} }
query CharactersNameAndHouse { allCharacters { name house { words }
} } Operation Type
query CharactersNameAndHouse { allCharacters { name house { words }
} } Operation Name
query CharactersNameAndHouse { allCharacters { name house { words }
} } Selection Set
query CharactersNameAndHouse { allCharacters { name house { words }
} } Fields
query CharactersNameAndHouse { allCharacters { name house { words }
} } { "data": { "allCharacters": [ { "name": "Daenerys Targaryen", "house": { "words": "Fire and Blood" } }, { "name": "Jon Snow", "house": { "words": "Winter Is Coming" } } ] } }
query { character(name: "Hodor") { name house { words }
} } Arguments
query CharacterByName($name: String!) { character(name: $name) { name } }
{ "name": "Hodor" } Variables
query { character(name: "Hodor") { ...CharacterFragment } } fragment CharacterFragment
on Character { name house { words } } Fragments
{ character(name: "Hodor") { ... on Character { name house
{ words } } } } Inline Fragments
Mutations for manipulating data and fetch the updated result
type Mutation { createCharacter(name: String!): Character }
mutation CharacterMutation { createCharacter(name: "Sansa Stark") { name } }
{ "data": { "createCharacter": { "name": "Sansa Stark" } } }
Subscriptions for real-time updates
type Subscription { newCharacter: Character! }
subscription NewCharacterSubscription { newCharacter { name } } { "data":
{ "newCharacter": { "name": "Tyrion Lannister" } } }
Query Execution
{ getHouse(id: 5) { name words members { name }
} }
name words members getHouse(id: 5) { name, words, members }
[ { name }, { name } ] name name
QUERY name words members getHouse(id: 5) { name, words, members
} [ { name }, { name } ] name name
QUERY getHouse(id: 5) { name, words, members } HOUSE name
words members [ { name }, { name } ] name name
QUERY getHouse(id: 5) { name, words, members } HOUSE name
words members [ { name }, { name } ] CHARACTER name name
Clients with Super Powers
Introspection Queries
{ "data": { "__type": { "name": "Book", "kind": "OBJECT", "fields":
[ { "name": "title", "type": { "name": "String" } } ] } } } { __type(name: "Book") { name kind fields { name type { name } } } }
None
GraphiQL
None
Graphene GraphQL framework for Python
Created September 24, 2015 Updated September 20, 2017 229 Forks
2,356 Stars 1,219 Commits 87 Open Issues https://github.com/graphql-python/graphene
None
None
"It’s important to understand that it isn’t all or nothing.
GraphQL is in our future, but it isn’t our exclusive future."
Thank you!