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The official documentation can be found here.

How to switch from hmset() to hset() in Redis?

I get the deprication warning, that Redis.hmset() is deprecated. Use Redis.hset() instead.

However hset() takes a third parameter and I can’t figure out what name is supposed to be.

info = {'users': 10, "timestamp": datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S')}
r.hmset("myKey", info)

The above works, but this requires a first parameter called name.

r.hset(name, "myKey", info)

Comparing the hset vs hmset in docs isn’t clear to me.

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4

Answers


  1. 0

    You may execute multiple hset for each field/value pair in hmset.

    r.hset('myKey', 'users', 10)
r.hset('myKey', 'timestamp', datetime.utcnow().strftime('%Y-%m-%d %H:%M:%S'))
r.hset('myKey', 'yet-another-field', 'yet-another-value')
    • first parameter is the key name
    • second parameter is the field name
    • third parameter is the value of the field.
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  2. 0

    hmset(name, mapping): given a hash name ("myKey") and a dictionary (info) set all key/value pairs.

    hset(name, key=None, value=None, mapping=None): given a hash name ("myKey") a key and a value, set the key/value. Alternatively, given a dictionary (mapping=info) set all key/value pairs in mapping.

    Source: https://redis-py.readthedocs.io/en/stable/

    If this does not work, perhaps you need to update the library?

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  3. 0

    The problem is that you must specify within hset() that you are giving it the mapping. In your case:

    r.hset("myKey", mapping=info)

    instead of

    r.hset("myKey", info)
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  4. 0

    I was using Redis.hmset() as following:

    redis.hmset('myKey', info)

    If you use Redis.hset() the following you will not get warning.

    redis.hset('myKey', key=None, value=None, mapping=info)

    With this usage, we will skip the single key & value adding step and redis.hset() will set all of the key and value mappings in info to myKey.

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