def _invalidate_cache(self, instance):
"""
Explicitly set a None value instead of just deleting so we don't have any race
conditions where:
Thread 1 -> Cache miss, get object from DB
Thread 2 -> Object saved, deleted from cache
Thread 1 -> Store (stale) object fetched from DB in cache
Five second should be more than enough time to prevent this from happening for
a web app.
"""
cache.set(instance.cache_key, None, 5)
def invalidate_cache(obj, field):
cache.set(obj._get_cache_key(field=field), None, 5)
def invalidate_cache(obj, field):
cache.set(obj._get_cache_key(field=field), None, 5)
