I'm using redis 2.8.4 in a python project of mine. In a particular sorted set, I want to zadd
with the nx
option. The nx
option isn't documented in redis-py docs, and according to the docs , it only works with redis 3.0.2 or greater.
So what's an alternative pattern I can follow to simulate the nx
option when doing zadd
?
The most efficient pattern that comes to my mind is using using zscore
(or zrank
) to test for existence. If value exists, do nothing, otherwise, zadd
the relevant value.
我在github问题中找到了解决方案:
redis.execute_command('ZADD', set_name, 'NX', score, key)
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