Question

Using redis-rb, how can I push a hash into a list? Do I have to JSON encode it or is this natively supported? If so, how can I do it? I only see hset method with a key and key/value pairs.

Thanks

Answer 1

Storing any object (not just hash) as a JSON encoded string is one way to do it.

If your use case allows it you can also store hash IDs within the list and use SORT GET to retrieve additional values.

Example:

r.hmset('person:1', 'name','adam','age','33')
r.hmset('person:2', 'name','eva','age','28')    

r.lpush('occupants', 'person:1')
r.lpush('occupants', 'person:2')

r.sort('occupants', :get => ['*->name'])

To get list names from hashes which IDs are stored within occupants list. You can retrieve multiple fields, but you will get only array back.

For more information check SORT command