GraphQL Korea Meetup (06/13/2020)

1. Relay with Python

Presenter: Jaehyun!!! ㅎ_ㅎ

"Unexpected efficiency from predictable consistency"

Graphene

• When defined in ORM way, it converts to GraphQL Schema

• Objectifies GraphQL and makes it well!

Relay

Graphene supports Relay

Relay

: JavaScript framework for building GraphQL-based data-driven React applications

• Node

  • Interface provided by graphene.relay

  • Has only one ID! field

• Connection

  • Enhanced version of list that provides slicing and pagination

    • Each point distributed in the Graph is called Node, meaning one entity that constitutes the data structure,

    • The line connecting related Nodes is called Edge

      • In GraphQL, the address of each Node is called Cursor,

        • Connection is a pagination design pattern based on Cursor

  • ex)

    • relay.Connection

    • relay.ConnectionField

• Mutations

  • Mutations that perform data modification work can be easily managed in Graphene through subclass relay.ClientIDMutation

Graphene-Django

Docs

• Helps to easily apply GraphQL in Django

2. How to handle GraphQL as a language

Presenter: Hyesung Kim

"Today, GraphQL is not only implementing APIs but also acting as a powerful "modeling language". I introduce how to handle GraphQL language with JavaScript and various cases of extending it."

Document

• Top-level node of GraphQL AST

• Contains various Definitions underneath

Definition

• Executable Definition

  • Query / Mutation / Fragment etc.

• Other Definition

  • That part familiar to Client developers.. ㅎ

SDL (Schema Definition Language)

Powerful general-purpose modeling language

• Directed cyclic graph

• Type system-based validation

• Polymorphism support through Interface / Union

• Extensibility

• Macro

Schema vs ExecutableSchema

• Adds runtime through several preprocessing tasks

  • Resolvers

  • Directives

    • Directives that can provide additional information to GraphQL Document processors

      • Standard (@deprecated, @include, @skip)

      • Schema Directive

        • ex) @deprecated

      • Operational Directive

        • ex) @include, @skip

+

Impressions

• I became more interested in GraphQL!!!!!!

• I should study it more deeply, it's so interesting!