Path Operations and Decorators
Learn how FastAPI decorators map HTTP methods to handler functions, and how to use APIRouter to organize routes into modules.
Path Parameters
Declare, validate, and document path parameters in FastAPI using type hints and Annotated with Path for advanced constraints.
Query Parameters
Declare optional and required query parameters with defaults, type coercion, validation constraints, and multi-value query params in FastAPI.
Request Body and Validation
Accept structured JSON request bodies using Pydantic models, combine body with path and query params, and use Body for advanced field control.