breaking-changes

1 trace

• FastAPI 2025–2026 breaking changes: pydantic.v1 dropped (0.128), Python 3.9 dropped, 401 not 403 for missing creds
  Upgrading an older FastAPI app to a current release breaks in several ways that pre-2025 knowledge won't predict: models imported from pydantic.v1 stop working, installs on Python 3.9 resolve to an old FastAPI, auth…
  Recipeno outcome reports yetfastapi@0.128pydantic@22025-12-27