error on fetch or filtering

Hello. I’m following the starter tutorial at https://www.youtube.com/watch?v=jJYHUp9ZeTY&t=56s.

I’m getting error when trying to fetch data from a HashModel. For example: result = Product.all_pks() gets: redis.exceptions.ResponseError: syntax error

For creating: exists = Product.find(Product.name == product.name).first() gets: TypeError: 'NoneType' object is not subscriptable

Creating is OK.

Versions: Python version: 3.9.7 redis-om-python: 0.0.20

[alecvinent]

In deed, but it’s still failing. I’m willing the issue may be due to the OS. I’ll test on Ubuntu, cause currently using Windows 10.

[simonprickett]

Is the value of REDIS_DB > 0? RediSearch functionality only operates on DB 0 so if you’re using search and the Migrator that will fail silently (I’m about to put out a release that will detect use of DB > 0 and raise a proper error). This works locally for me:

$ python issue.py
['01G025DB81XWJ766JEHPYDV2HH']

from redis_om import Field, HashModel, get_redis_connection

REDIS_HOST = "127.0.0.1"
REDIS_PORT = 6379
REDIS_DB = 0

redis_instance = get_redis_connection(
    host=REDIS_HOST,
    port=REDIS_PORT,
    password='',
    db=REDIS_DB,
    decode_responses=True
)

class Product(HashModel):
    name: str = Field(index=True)
    price: float
    quantity: int

    class Meta:
        database: redis_instance

a_product = Product(
    name="Test Product",
    price=10.99,
    quantity=4
)

a_product.save()

all_product_keys = list(Product.all_pks())
print(all_product_keys)

You could simplify this too as you don’t need all the connection stuff:

$ export REDIS_OM_URL=redis://127.0.0.1:6379
$ python issue.py
['01G025GN8RQ1J0WRV5G96G0MM4']

You don’t even need to set REDIS_OM_URL in this case as localhost, 6379, no password are the defaults.

Simplified code:

from redis_om import Field, HashModel

class Product(HashModel):
    name: str = Field(index=True)
    price: float
    quantity: int

a_product = Product(
    name="Test Product",
    price=10.99,
    quantity=4
)

a_product.save()

all_product_keys = list(Product.all_pks())
print(all_product_keys)