pyv4 client is not honoring server config DEFAULT_VECTORIZER_MODULE

[dudanogueira]

First, run a server like this:

docker run -e DEFAULT_VECTORIZER_MODULE="text2vec-openai" -e ENABLE_MODULES="text2vec-openai" -p 8080:8080 -p 50051:50051 cr.weaviate.io/semitechnologies/weaviate:1.25.0 

Now, if you do not define a vectorizer at all, it should default to `text2vec-openai``

This is true when calling the endpoint api directly, and never passing the vectorizer whatsoever

curl --request POST  -H "Content-Type: application/json" --url http://localhost:8080/v1/schema  --data '{"class": "Test"}'

curl --request GET --url http://localhost:8080/v1/schema/Test | jq .vectorizer

$ "text2vec-openai"

if you intentionally pass it as none, it will be honored the provided value

curl --request POST  -H "Content-Type: application/json" --url http://localhost:8080/v1/schema  --data '{"class": "TestNone", "vectorizer": "none"}'

curl --request GET --url http://localhost:8080/v1/schema/Test | jq .vectorizer

$ "none"

that expected behaviour is not reflected in the client, if you call

collection = client.collections.create("TestNoneFromClient")

it will intentionally pass none to the rest endpoint, and not honor the server configuration.

curl --request GET --url http://localhost:8080/v1/schema/TestNoneFromClient | jq .vectorizer

$none

The new collection TestNoneFromClient is expected to have the vectorizer set to text2vec-openai

I propose removing or _Vectorizer.none() from:

weaviate-python-client/weaviate/collections/collections.py

Line 125 in 03760e4

vectorizer_config=vectorizer_config or _Vectorizer.none(),

Not sure how to write tests for this 😬