def hget_item(self, key, dict_key, recover=None, ttl=None, arguments=([], {}), **kw):
item_key = self.redis.get(key)
value = self.redis.hget(item_key, dict_key) if item_key else None
# return None if cannot recover the value
if value is None and recover is None:
return None
# Trying to recover the value
if value is None:
return self.hset_item(key, dict_key, lambda: recover(*arguments[0], **arguments[1]), ttl=ttl)
else:
return deserialize(value)
def get_list(self, key, recover=None, ttl=None, arguments=([], {}), key_extractor=None):
# First, get the keys list
value = self.redis.get(key)
if value is None and recover is None:
return None, None
# Trying to recover the value
if value is None:
return self.set_list(
key, lambda: recover(*arguments[0], **arguments[1]), ttl=ttl, key_extractor=key_extractor
)
else:
metadata, item_keys = deserialize(value)
return metadata, [self.get_item(item_key) for item_key in item_keys]