Vertex Matching Engine deny list tokens

[CaptainPumpkin]

How does the Vertex matching engine deny list work?

Let's say I have a class fruit which will ONLY have deny list tokens (no allow) such as "apple", "mango", etc. How do I filter out "mango" in the query (search all fruits except mango)? I have tried the following method but it does not work as expected:

json
{"id": "1", "embedding":[0.002792,0.000492], "restricts": [{"namespace": "fruit", "deny": ["mango"]}]}

query
deny_namespace = match_service_pb2.Namespace()
deny_namespace.name = "fruit"
deny_namespace.deny_tokens.append("mango")
request.restricts.append(deny_namespace)

I have coded this similar to allow list which has worked for me but with deny tokens it does not seem to skip deny tokens even after completely overwriting the index. 

[Eduardo_Ortiz]

Based on the documentation that you shared about the filters and the code you are sharing, it looks like there’s a formatting error on your code, based on the doc the JSON should look like the example I’m providing you below.

{"id": "42", "embedding": [0.5, 1.0], "restricts": [{"namespace": "class", "allow": ["cat", "pet"]},{"namespace": "category", "allow": ["feline"]}]}

[CaptainPumpkin]

@Eduardo_Ortiz Thanks for looking into this!
Yes this is for allow list, but I'm specifically asking for deny list. When I changed the "deny" to "allow" it seems to work but it fails for "deny". Can you or someone from the team please help me with this?

[Eduardo_Ortiz]

Did you try to add deny tokens onto your case?

[federicoprt]

Hello @Eduardo_Ortiz ,

I tried what you said but it does not work anyway. For a more details, I opened an issue on github:  https://github.com/GoogleCloudPlatform/vertex-ai-samples/issues/1230