fastapi-best-practices

Structure your FastAPI project by separating interface, application, domain, and infrastructure layers. This hexagonal architecture approach isolates business logic, ensuring your domain remains independent of frameworks and databases for better maintainability.

The best way to manage database sessions in FastAPI involves choosing between Session-per-Request and Unit of Work approaches. These strategies ensure proper transaction boundaries and resource cleanup for scalable applications.

Configure the FastAPI testing pyramid by implementing unit tests, integration tests, and end-to-end tests. This strategy validates individual components, module interactions, and complete user flows to ensure comprehensive coverage.

Pydantic-settings works for FastAPI configuration management by validating environment variables and external settings. It provides type-safe configuration loading, ensuring your application starts with correctly typed and validated parameters.

FastAPI code conventions define specific rules for interface, application, domain, and infrastructure layers. These guidelines standardize code organization, ensuring consistent separation of concerns across your development team.

Use the Cache-Aside pattern in FastAPI to improve performance by loading data into cache on demand. This approach reduces database load and latency for frequently accessed, read-heavy operations.