Django & GraphQL
GraphQL with Django, Strawberry/Graphene, schema, queries, mutations, subscriptions, authentication, DataLoader, N+1 problem
1What is GraphQL and what is its main difference from REST?
What is GraphQL and what is its main difference from REST?
Answer
GraphQL is a query language for APIs developed by Facebook. Unlike REST which exposes multiple endpoints returning fixed data structures, GraphQL uses a single endpoint allowing the client to specify exactly the data it needs. This solves the over-fetching (receiving too much data) and under-fetching (having to make multiple requests) problems common with REST.
2What are the two main GraphQL libraries available for Django?
What are the two main GraphQL libraries available for Django?
Answer
Strawberry and Graphene-Django are the two main GraphQL libraries for Django. Graphene-Django is more mature and widely adopted, using a class-based syntax. Strawberry is more modern, uses native Python type hints and offers better integration with typing tools. Strawberry is recommended for new projects due to its more pythonic syntax and native async support.
3How to define a simple GraphQL type with Strawberry to represent a Django User model?
How to define a simple GraphQL type with Strawberry to represent a Django User model?
Answer
With Strawberry, the @strawberry.type decorator is used on a dataclass class to define a GraphQL type. Fields are declared with standard Python type hints (str, int, etc.). This approach leverages Python's native typing system, making code more readable and enabling better integration with IDEs and type checking tools like mypy.
What is a resolver in GraphQL and what is its role?
What is the difference between a Query and a Mutation in GraphQL?
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