fastapi-patterns

Topics in the source

• FastAPI Patterns
• When to Use
• How It Works
• Project Layout
• Application Factory
• Pydantic Schemas
• Dependencies
• Async Endpoints

Production-oriented patterns for FastAPI services. Building or reviewing a FastAPI app. Splitting routers, schemas, dependencies, and database access. Writing async endpoints that call a database or external service. Adding authentication, authorization, OpenAPI docs, tests, or deployment settings. Checking a FastAPI PR for copy-pasteable examples and production risks. Treat the FastAPI app as a thin HTTP layer over explicit dependencies and service code: main.py owns app construction, middleware, exception handlers, and router registration. schemas/ owns Pydantic request and response models. dependencies.py owns database, auth, pagination, and request-scoped dependencies. services/ or crud/ owns business and persistence operations. tests/ overrides dependencies instead of opening production resources. Prefer small routers and explicit responsemodel declarations. Keep raw ORM objects, secrets, and framework globals out of response schemas. Use a factory so tests and workers can build the app with controlled settings. Do not use alloworigins=[""] with allowcredentials=True; browsers reject that combination and Starlette disallows it for credentialed requests. Keep request, update, a

This is an excerpt. Refer to the complete source and its current requirements.