嵌套聚合不適用於AggregationContainer

Question

我遇到了嵌套聚合問題。這裏是我如何定義我的聚合和我得到的json等價物：

var aggregations = new AggregationDictionary(); 

var nestedAgg = new AggregationContainer 
{ 
    Nested = new NestedAggregation("some_name1") 
    { 
    Path = "users", 
    Aggregations = new TermsAggregation("some_name2") 
    { 
     Field = "users.name.keyword", 
     Size = 100, 
     Order = new List<TermsOrder> { new TermsOrder() { Key = "_term", Order = SortOrder.Descending } } 
    } 
}; 

aggregations[aggKey] = nestedAgg; 

searchRequest.Aggregations = aggregations; 

上面的內容翻譯爲以下json。只顯示路徑和沒有彙總定義：

{ 
    "aggs": { 
    "some_name1": { 
     "nested": { 
      "path": "users" 
      } 
    } 
} 

Answer 1

使用AggregationDictionary和AggregationContainer直接是一個有點尷尬;你可以這樣做，這樣

var aggregations = new AggregationDictionary(); 
var aggKey = "some_name1"; 

AggregationContainer nestedAgg = new NestedAggregation("some_name1") 
{ 
    Path = "users", 
    Aggregations = new TermsAggregation("some_name2") 
    { 
     Field = "users.name.keyword", 
     Size = 100, 
     Order = new List<TermsOrder> 
     { 
      new TermsOrder() { Key = "_term", Order = Nest.SortOrder.Descending } 
     } 
    } 
}; 

aggregations[aggKey] = nestedAgg; 

var searchRequest = new SearchRequest<Test>(); 

searchRequest.Aggregations = aggregations; 

client.Search<Test>(searchRequest); 

在這裏，我們使用來自AggregationBase到AggregationContainer隱式轉換（基類集合派生自）到NestedAggregation分配給AggregationContainer類型的變量。

This implicit conversion also sets the Aggregations and Meta properties on AggregationContainer, which is why your original attempt doesn't quote work correctly.