policies: fix error when clearing policy cache when no policies are cached
Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>
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@ -26,5 +26,5 @@ def invalidate_policy_cache(sender, instance, **_):
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cache.delete_many(keys)
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LOGGER.debug("Invalidating policy cache", policy=instance, keys=total)
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# Also delete user application cache
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keys = cache.keys(user_app_cache_key("*"))
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keys = cache.keys(user_app_cache_key("*")) or []
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cache.delete_many(keys)
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