FastAPI + Django in Production: Lessons From a Hybrid Stack
SMRTR summary
Running FastAPI on top of Django sounds like a best-of-both-worlds setup, but two painful pitfalls emerge: async endpoints serializing ORM calls onto a single thread instead of running concurrently, and tests failing to see their own database writes due to cross-thread connection isolation. Both issues stem from Django's thread-local connection model colliding with FastAPI's async runtime.
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