Example in README is broken, raise exception wrong number of arguments for 'hset' command

[raceychan]

below is the detail of the exception:

File "/root/myproject/mystatement/src/deps/event_store.py", line 64, in main
await andrew.save()
File "/root/deps/miniconda3/envs/spps/lib/python3.8/site-packages/aredis_om/model/model.py", line 1303, in save
await db.hset(self.key(), mapping=document)
File "/root/deps/miniconda3/envs/spps/lib/python3.8/site-packages/aioredis/client.py", line 1064, in execute_command
return await self.parse_response(conn, command_name, **options)
File "/root/deps/miniconda3/envs/spps/lib/python3.8/site-packages/aioredis/client.py", line 1080, in parse_response
response = await connection.read_response()
File "/root/deps/miniconda3/envs/spps/lib/python3.8/site-packages/aioredis/connection.py", line 868, in read_response
raise response from None
aioredis.exceptions.ResponseError: wrong number of arguments for 'hset' command

above exception happened after running:

class Customer(HashModel):
    first_name: str
    last_name: str
    email: str
    join_date: datetime.date
    age: int
    bio: Optional[str]

# First, we create a new `Customer` object:
andrew = Customer(
    first_name="Andrew",
    last_name="Brookins",
    email="andrew.brookins@example.com",
    join_date=datetime.date.today(),
    age=38,
    bio="Python developer, works at Redis, Inc.",
)

print(andrew.pk)
await andrew.save()
a = await Customer.get(andrew.pk)
print(a)

pip show aioredis:
Name: aioredis
Version: 2.0.0

pip show redis-om
Name: redis-om
Version: 0.0.20

[simonprickett]

What version of Redis server are you running this against please? HSET started to accept multiple name/value pairs from Redis 4 onwards (https://redis.io/commands/hset/) and if you are using an older Redis server you'll need to move to at least version 5, preferably 6.

[raceychan]

What version of Redis server are you running this against please? HSET started to accept multiple name/value pairs from Redis 4 onwards (https://redis.io/commands/hset/) and if you are using an older Redis server you'll need to move to at least version 5, preferably 6.

thanks, would check on that and update.

[raceychan]

What version of Redis server are you running this against please? HSET started to accept multiple name/value pairs from Redis 4 onwards (https://redis.io/commands/hset/) and if you are using an older Redis server you'll need to move to at least version 5, preferably 6.

hi sorry for the late reply, but as i checked on the redis servie --version it says
"Redis server v=6.2.6 sha=00000000:0 malloc=jemalloc-5.1.0 bits=64 build=1cff261a475b7441"
it seems like the same problem occurs with redis version >= 6?

[simonprickett]

Hi there - this is working for me, I did have to change example.com in the email from the README to something else as the email validator appears to actually check for a valid domain... other than that it worked as shown in the README:

import datetime
from typing import Optional

from pydantic import EmailStr

from redis_om import HashModel


class Customer(HashModel):
    first_name: str
    last_name: str
    email: EmailStr
    join_date: datetime.date
    age: int
    bio: Optional[str]

# First, we create a new `Customer` object:
andrew = Customer(
    first_name="Andrew",
    last_name="Brookins",
    email="andrew.brookins@whatever.com",
    join_date=datetime.date.today(),
    age=38,
    bio="Python developer, works at Redis, Inc."
)

# The model generates a globally unique primary key automatically
# without needing to talk to Redis.
print(andrew.pk)
# > "01FJM6PH661HCNNRC884H6K30C"

# We can save the model to Redis by calling `save()`:
andrew.save()

# Expire the model after 2 mins (120 seconds)
andrew.expire(120)

# To retrieve this customer with its primary key, we use `Customer.get()`:
assert Customer.get(andrew.pk) == andrew

[raceychan]

you are right, it works well after i change to a new machine. not sure wts wrong here tho.