Complex objects with redis-py

Question

I've been using the redis-cli to get the hang of how redis works. I understand that using this tool I can do this:

127.0.0.1:6379> set post:1:title "Redis is cool!"
OK
127.0.0.1:6379> set post:1:author "haye321"
OK
127.0.0.1:6379> get post:1:title
"Redis is cool!"

What I cannot seem to figure out is how I would accomplish this with redis-py. It doesn't seem the set commanded provided allows for an object-type or id. Thanks for your help.

Answer 1

You are setting individual fields of a Redis hash one by one (a hash is the common data structure in Redis to store objects).

A better way to do this is to use Redis HMSET command, that allows to set multiple fields of a given hash in one operation. Using Redis-py it will look like this:

import redis
redisdb = redis.Redis(host="localhost",db=1)
redisdb.hmset('post:1', {'title':'Redis is cool!', 'author':'haye321'})

update:

Of course you could have set Hash field members one by one using the HSET command, but it's less efficient as it requires one request per field:

import redis
redisdb = redis.Redis(host="localhost",db=1)
redisdb.hset('post:1', 'title', 'Redis is cool!')
redisdb.hset('post:1', 'author', 'haye321'})

Answer 2

Another way: you can use RedisWorks library.

pip install redisworks

>>> from redisworks import Root
>>> root = Root()
>>> root.item1 = {'title':'Redis is cool!', 'author':'haye321'}
>>> print(root.item1)  # reads it from Redis
{'title':'Redis is cool!', 'author':'haye321'}

And if you really need to use post.1 as key name in Redis:

>>> class Post(Root):
...     pass
... 
>>> post=Post()
>>> post.i1 = {'title':'Redis is cool!', 'author':'haye321'}
>>> print(post.i1)
{'author': 'haye321', 'title': 'Redis is cool!'}
>>> 

If you check Redis

$ redis-cli
127.0.0.1:6379> type post.1
hash