c# - Elasticsearch Nest客户端未应用提升

Question

我正在调查一个搜索结果与预期不符的错误，并发现这是因为未应用增强功能。

该查询是使用NEST(6.6.0)使用以下代码生成的:

queryContainer = new MultiMatchQuery
{
    Fuzziness = Fuzziness.Auto,
    Query = querystring,
    Type = TextQueryType.BestFields,
    Fields = Infer.Fields<RecipeSearchModel>(
        f1 => Infer.Field<RecipeSearchModel>(f => f.Title, 5),
        f2 => f2.Description,
        f3 => Infer.Field<RecipeSearchModel>(f => f.Ingredients, 3),
        f4 => f4.Method,
        f5 => Infer.Field<RecipeSearchModel>(f => f.Image.Alt, 4))
};

但是生成的查询没有应用任何提升。

      "multi_match": {
        "fields": [
          "title",
          "description",
          "ingredients",
          "method",
          "image.alt"
        ],
        "fuzziness": "AUTO",
        "query": "chocolate",
        "type": "best_fields"
      }

从 documentation可以看出，这似乎是正确的，为什么它不起作用？

Answer 1

确实看起来boost在某个地方被忽略了，here是github问题的链接。
现在，您可以尝试其他语法:

queryContainer = new MultiMatchQuery
{
    Fuzziness = Fuzziness.Auto,
    Query = "query",
    Type = TextQueryType.BestFields,
    Fields = Infer.Fields<RecipeSearchModel>()
        .And(Infer.Field<RecipeSearchModel>(f => f.Title, 5))
        .And<RecipeSearchModel>(f => f.Description)
        .And(Infer.Field<RecipeSearchModel>(f => f.Ingredients, 3))
        .And<RecipeSearchModel>(f => f.Method)
        .And(Infer.Field<RecipeSearchModel>(f => f.Image.Alt, 4))
};

生成以下查询到elasticsearch

{
  "query": {
    "multi_match": {
      "fields": [
        "title^5",
        "description",
        "ingredients^3",
        "method",
        "image.alt^4"
      ],
      "fuzziness": "AUTO",
      "query": "query",
      "type": "best_fields"
    }
  }
}

经NEST 6.6.0测试。

希望能有所帮助。