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#request-scoped

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Request‑Scoped Caching in FastAPI Dependency Injection: When and How to Use Sub‑Dependencies

Learn how FastAPI caches dependencies per request, shares sub‑dependency instances, and lets you swap them in tests without touching production data.

sub-dependencies request-scoped

fastapiTasadduq Burneyowner26K rep · 14 Apr 2026, 12:51 UTC