c# - 带有附加 TermAggregation 的 TermAggregation 在 AggregationDictionary 中不起作用

Question

使用 NEST 我有一个看起来像这样的请求

var searchRequest = new SearchRequest<T>()
{
...
    Aggregations = new TermsAggregation("field1")
    {
        Field = "field1",
        Aggregations = new TermsAggregation("field2")
        {
            Field = "field2",
        }
    },
...
}

await _elasticClient.SearchAsync<T>(searchRequest)

我得到了我预期的结果，“field2”上的聚合为“field1”下的每个替代项

我想要其他聚合，所以我将术语聚合放在 AggregationDictionary 中。

var aggs = new AggregationDictionary();
aggs.Add("field1", new TermsAggregation("field1")
    {
        Field = "field1",
        Aggregations = new TermsAggregation("field2")
        {
            Field = "field2",
        }
    })
...
var searchRequest = new SearchRequest<T>()
{
...
    Aggregations = aggs,
...
}
...
await _elasticClient.SearchAsync<T>(searchRequest)

现在我在“field1”上得到聚合，但在“field2”上没有子聚合。

我错过了什么还是应该以这种方式工作？

编辑 1:为 AggregationDictionary.Add 添加了键，以便我的示例代码(希望)编译并包含我的 SearchAsync 调用

Answer 1

aggs.Add( new TermsAggregation("field1")
    {
        Field = "field1",
        Aggregations = new TermsAggregation("field2")
        {
            Field = "field2",
        }
    })

此代码不会编译为 AggregationDictionary.Add() method signature是

public void Add(string key, AggregationContainer value)

以下

var client = new ElasticClient();

var aggs = new AggregationDictionary();
aggs.Add("field1", new TermsAggregation("field1")
{
    Field = "field1",
    Aggregations = new TermsAggregation("field2")
    {
        Field = "field2",
    }
});

var request = new SearchRequest<object>
{
    Aggregations =aggs
};

var searchResponse = client.Search<object>(request);

发出以下请求

{
  "aggs": {
    "field1": {
      "aggs": {
        "field2": {
          "terms": {
            "field": "field2"
          }
        }
      },
      "terms": {
        "field": "field1"
      }
    }
  }
}

看看documentation on Writing Aggregations .聚合可以通过 && 在同一级别组合在一起将它们放在一起