How to implement vector data insertion and querying? about nredisstack HOT 6 CLOSED

    [Fact]
    public void QueryingVectorFields()
    {
        IDatabase db = redisFixture.Redis.GetDatabase();
        db.Execute("FLUSHALL");
        var ft = db.FT();

        var schema = new Schema().AddVectorField("v", Schema.VectorField.VectorAlgo.HNSW, new Dictionary<string, object>()
        {
            ["TYPE"] = "FLOAT32",
            ["DIM"] = "2",
            ["DISTANCE_METRIC"] = "L2",
        });

        ft.Create("idx", new FTCreateParams(), schema);

        db.HashSet("a", "v", "aaaaaaaa");
        db.HashSet("b", "v", "aaaabaaa");
        db.HashSet("c", "v", "aaaaabaa");

        var q = new Query("*=>[KNN 2 @v $vec]").ReturnFields("__v_score").Dialect(2);
        var res = ft.Search("idx", q.AddParam("vec", "aaaaaaaa"));
        Assert.Equal(2, res.TotalResults);
    }

    [Fact]
    public void VectorSimilaritySearch()
    {
        IDatabase db = redisFixture.Redis.GetDatabase();
        db.Execute("FLUSHALL");
        var ft = db.FT();
        var json = db.JSON();

        json.Set("vec:1", "$", "{\"vector\":[1,1,1,1]}");
        json.Set("vec:2", "$", "{\"vector\":[2,2,2,2]}");
        json.Set("vec:3", "$", "{\"vector\":[3,3,3,3]}");
        json.Set("vec:4", "$", "{\"vector\":[4,4,4,4]}");

        var schema = new Schema().AddVectorField(FieldName.Of("$.vector").As("vector"), Schema.VectorField.VectorAlgo.FLAT, new Dictionary<string, object>()
        {
            ["TYPE"] = "FLOAT32",
            ["DIM"] = "4",
            ["DISTANCE_METRIC"] = "L2",
        });

        var idxDef = new FTCreateParams().On(IndexDataType.JSON).Prefix("vec:");
        Assert.True(ft.Create("vss_idx", idxDef, schema));

        float[] vec = new float[] { 2, 2, 2, 2 };
        byte[] queryVec = MemoryMarshal.Cast<float, byte>(vec).ToArray();


        var query = new Query("*=>[KNN 3 @vector $query_vec]")
                            .AddParam("query_vec", queryVec)
                            .SetSortBy("__vector_score")
                            .Dialect(2);
        var res = ft.Search("vss_idx", query);

        Assert.Equal(3, res.TotalResults);

        Assert.Equal("vec:2", res.Documents[0].Id.ToString());

        Assert.Equal(0, res.Documents[0]["__vector_score"]);

       var jsonRes = res.ToJson();
        Assert.Equal("{\"vector\":[2,2,2,2]}", jsonRes![0]);
    }