Question 1

How to set up dependency injection in Litestar?

Accepted Answer

Litestar's DI system uses the Provide class to define sync or async dependencies at various levels; you can inject them into route handlers by declaring parameters, similar to pytest fixtures, as shown in the README example.

Question 2

Litestar vs FastAPI: which is better for type-safe APIs?

Accepted Answer

Choose Litestar for stricter type enforcement and high performance with msgspec; FastAPI offers more flexibility with Pydantic and a larger ecosystem. Both support OpenAPI, but Litestar is more opinionated on typing.

Question 3

Can I use Pydantic with Litestar?

Accepted Answer

Yes, Litestar supports Pydantic versions 1 and 2 alongside msgspec, dataclasses, and attrs for data validation, allowing mixed usage within the same application for flexible serialization.

Question 4

How to handle authentication with route guards?

Accepted Answer

Implement guard functions that validate requests before hitting route handlers; apply them at app, router, or controller levels, and raise exceptions like NotAuthorizedException for unauthorized access, as detailed in the route guards section.

Question 5

Does Litestar support websockets?

Accepted Answer

As an ASGI framework, Litestar should support websockets, but the README doesn't explicitly detail it; check the documentation for specific implementations or plugin-based extensions for real-time features.

Question 6

How to generate OpenAPI docs automatically?

Accepted Answer

Litestar automatically generates OpenAPI 3.1 schemas from type hints; enable documentation UIs like Redoc or Swagger-UI in the app configuration, and it serves them by default with examples from polyfactory.

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