async def on_startup() -> None:
# Necessary for testing, because dependency injection
# works in path operations only, eg. functions.
settings = app.dependency_overrides.get(get_settings, get_settings)()
rc = RedisCacheBackend(settings.redis_dsn)
# Testing can possibly trigger lifespan events multiple times,
# and cache registry raise an error if an entry is already registered.
if caches.get(CACHE_KEY):
caches.remove(CACHE_KEY)
caches.set(CACHE_KEY, rc)
def redis_cache():
return caches.get(CACHE_KEY)
def cache():
return caches.get(CACHE_KEY)
def redis_cache() -> Optional[BaseCacheBackend]:
return caches.get(CACHE_KEY)