2.3.3 中 FunctionScoreFunctionsDescriptor 和 FunctionScoreFunction 的等效类型是什么

Question

正在从 NEST 1.6.2 升级到 2.3.3。

NEST 2.3.3 中 FunctionScoreFunctionsDescriptor 和 FunctionScoreFunction 的新类型是什么？

他们是 FunctionScoreFunctionsDescriptor -> ScoreFunctionsDescriptor 并且 FunctionScoreFunction -> ScoreFunctionsDescriptor?

如果是这样，我们构建一个 var functionScores = new List<Func<ScoreFunctionsDescriptor<IndexData>, ScoreFunctionsDescriptor<Property>>>()，但我们如何将其传递给

var searchDescriptor = new SearchDescriptor<IndexData>() .Paged(pageable) .Query(q => q .FunctionScore(fs => fs.Functions(***How do we pass the functionScores***));

我们可以像下面这样构建它吗？

functionScores.ForEach(f => searchDescriptor.Query(q => q.FunctionScore(fc => fc.Functions(f))));

Answer 1

function_score 查询可以采用 IEnumerable<IScoreFunction> 或 Func<ScoreFunctionsDescriptor<T>, IPromise<IList<IScoreFunction>>>，即采用分数描述符和 return 函数列表的函数。 ScoreFunctionsDescriptor<T> 实现 IPromise<IList<IScoreFunction>>

基于此，如果我们想把一堆函数聚合在一起，我们可以把一堆函数聚合过来，一个ScoreFunctionsDescriptor<T>和return一个ScoreFunctionsDescriptor<T>

public class Document
{
    public string Name { get; set;}
    public GeoLocation Location { get; set;}
}

var functions = new List<Func<ScoreFunctionsDescriptor<Document>, ScoreFunctionsDescriptor<Document>>>
{
    s => s.FieldValueFactor(fvf => fvf
        .Field(f => f.Name).Weight(3)),
    s => s.ExponentialGeoLocation(geo => geo
        .Field(f => f.Location)
        .Offset("1km")
        .Origin(new GeoLocation(-33.87189, 151.21623))
        .Scale("2km")
    )
};

client.Search<Document>(s => s
    .Query(q => q
        .FunctionScore(fs => fs
            .Functions(sc => functions.Aggregate(sc, (a,f) => f(a)))
        )
    )
);

在这个例子中产生

{
  "query": {
    "function_score": {
      "functions": [
        {
          "field_value_factor": {
            "field": "name"
          },
          "weight": 3.0
        },
        {
          "exp": {
            "location": {
              "origin": {
                "lat": -33.87189,
                "lon": 151.21623
              },
              "scale": "2.0km",
              "offset": "1.0km"
            }
          }
        }
      ]
    }
  }
}

2.3.3 中 FunctionScoreFunctionsDescriptor 和 FunctionScoreFunction 的等效类型是什么

What are the equivalent types for FunctionScoreFunctionsDescriptor & FunctionScoreFunction in 2.3.3

elasticsearch

nest

elasticsearch-net