Introduction to GraphQL and Graphene

Workshop Outline

• TypeDefs
• Query
• Mutation
• GraphQL Schema Language

System Requirements

• git v2 or greater
• python3.5 or greater + pip

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Follow one of the installation instructions (1,2)

This is the minimum workshop setup. Please prepare the project as described below.

1) Pre-Workshop Instructions/Requirements (install)

• git clone https://github.com/Speedy1991/graphql_workshop.git
• cd graphql_workshop
• If you want to use a virtual environment click here for instructions
• pip install -r requirements.txt
• python manage.py migrate
• python manage.py loaddata assets/initial (Installed 91 object(s) from 1 fixture(s))
• python manage.py runserver

2) Pre-Workshop Instructions/Requirements (dockerized)

• git clone https://github.com/Speedy1991/graphql_workshop.git
• cd graphql_workshop
• docker-compose up --force-recreate --build

Test your setup

• Open your browser and visit http://127.0.0.1:8000/admin and try to login with admin:12345

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Exercise overview

1. Write your first TypeDefs and resolvers
2. Extend your TypeDefs with more complex resolvers
3. Refactor with django-graphene
4. Write a custom resolver
   • Add Query Arguments
5. Write a mutation
6. Refactor
   • Replace mutation arguments with an InputType
   • Use EnumType
7. Interfaces
8. Polymorphic & interfaces
9. Some LiveCoding with AbstractTypes, etc.

Working through it

This is a very exercise-heavy workshop. You'll finde the exercises in the graphql_workshop/exercise[number] directory. Don't forget to change the used schema in the settings.

You find some helpful content on the Docs:

• graphene
• django_graphene
• django queries

Helpful shortcuts

• TODO: This is your job
• DOCS: This will give you a link to the specific doc page
• DJANGO: This will help you with some django specific code
• HINT: This will give you some useful tips
• QUESTION: Try to answer the question yourself - if you don't find the answer, feel free to ask :)

Django Cheatsheet

• SELECT * FROM <table> -> <ModelName>.objects.all()
• SELECT * FROM <table> WHERE id=<id> -> <ModelName>.objects.get(id=id) (raises if not exist)

Database overview

License

This material is available for private, non-commercial use under the GPL version 3.

If you would like to use this material to conduct your own workshop, please contact me at arthur.holz.91@gmail.com