elasticsearch - 嵌套DSL语法中的多个术语

Question

我正在尝试将以下查询转换为NEST DSL语法:

{
  "aggs": {
    "color": {
      "terms": {
        "field": "Color"
      }
    },
    "weight": {
      "terms": {
        "field": "Weight"
      }
    }
  }
}

每个术语都来自包含名称和fieldId的列表。到目前为止，我已经做到了:

  var request2 = _client.Search<T>(s => s
               .Aggregations(aggs =>
                   aggs.Terms("Weight", x => x.Field("Weight")).Terms("Color", x => x.Field("Weight"))));

这可以按预期工作，但是我需要能够动态提供参数Weight和Color，因为可以使用不同的参数集调用该方法。有没有办法使用类似的东西:

aggs.Terms(x => x.field( myList.foreach(y.value))));

我猜想这将与对象初始化器语法一起使用会更好，但是我宁愿在dsl中使用它。

Answer 1

像下面的东西会工作

var client = new ElasticClient();

var fields = new List<string>
{
    "color",
    "weight",
    "foo",
    "bar"
};

var response = client.Search<object>(s => s
    .Aggregations(aggs =>
    {
        foreach (var field in fields)
        {
            aggs.Terms(field, t => t.Field(field));
        }

        return aggs;
    })
);

生成以下请求

{
  "aggs": {
    "color": {
      "terms": {
        "field": "color"
      }
    },
    "weight": {
      "terms": {
        "field": "weight"
      }
    },
    "foo": {
      "terms": {
        "field": "foo"
      }
    },
    "bar": {
      "terms": {
        "field": "bar"
      }
    }
  }
}