Bug: Distance function 'CosineDistance' for VectorStoreRecordVectorProperty 'DescriptionEmbedding' is not supported by the Qdrant VectorStore.”

[Sc7-git]

SK source code:

	public static Distance GetSDKDistanceAlgorithm(VectorStoreRecordVectorProperty vectorProperty)
	{
		if (vectorProperty.DistanceFunction == null)
		{
			return Distance.Cosine;
		}
		return vectorProperty.DistanceFunction switch
		{
			"CosineSimilarity" => Distance.Cosine, 
			"DotProductSimilarity" => Distance.Dot, 
			"EuclideanDistance" => Distance.Euclid, 
			"ManhattanDistance" => Distance.Manhattan, 
			_ => throw new InvalidOperationException("Distance function '" + vectorProperty.DistanceFunction + "' for VectorStoreRecordVectorProperty '" + vectorProperty.DataModelPropertyName + "' is not supported by the Qdrant VectorStore."), 
		};
	}

docs:

https://learn.microsoft.com/en-us/semantic-kernel/concepts/vector-store-connectors/?pivots=programming-language-csharp#define-your-data-model

https://learn.microsoft.com/en-us/semantic-kernel/concepts/vector-store-connectors/out-of-the-box-connectors/qdrant-connector?pivots=programming-language-csharp#property-name-override

my code:

         // Create a Qdrant VectorStore object
         var vectorStore = new QdrantVectorStore(new QdrantClient("192.168.16.53"));

         // Choose a collection from the database and specify the type of key and record stored in it via Generic parameters.
         var collection = vectorStore.GetCollection<ulong, Hotel>("skhotels");

         // Create the collection if it doesn't exist yet.
         await collection.CreateCollectionIfNotExistsAsync(); 

await collection.CreateCollectionIfNotExistsAsync(); error System.InvalidOperationException:“Distance function 'CosineDistance' for VectorStoreRecordVectorProperty 'DescriptionEmbedding' is not supported by the Qdrant VectorStore.”

Please fix the documentation or sk source code, I will be very grateful.

[Sc7-git]

This is normal.

    public class Hotel
    {
        [VectorStoreRecordKey]
        public ulong HotelId { get; set; }

        [VectorStoreRecordData(IsFilterable = true)]
        public string HotelName { get; set; }

        [VectorStoreRecordData(IsFullTextSearchable = true)]
        public string Description { get; set; }

        //[VectorStoreRecordVector(4, DistanceFunction.CosineDistance, IndexKind.Hnsw, StoragePropertyName = "hotel_description_embedding")]
        //[VectorStoreRecordVector(Dimensions: 4, DistanceFunction.CosineDistance, IndexKind.Hnsw)]
        [VectorStoreRecordVector(1536)]
        public ReadOnlyMemory<float>? DescriptionEmbedding { get; set; }

        [VectorStoreRecordData(IsFilterable = true)]
        public string[] Tags { get; set; }
    }

[westey-m]

Thanks @Sc7-git for raising this. I'm working on updating the docs now.

[westey-m]

Docs have been updated.