编写 NEST 查询以按分数对聚合桶进行排序
Writing a NEST query to sort aggregation buckets by score
我想要的是为每个 unitId
(这是我文档中的一个字段)创建一个聚合桶。我希望每个桶都按该桶中的最高分数排序。我编写了以下查询来执行我想要的操作:
"aggs": {
"UnitAggregationBucket": {
"terms": {
"field": "unitId",
"size": 10,
"order": {
"max_score": "desc"
}
},
"aggs": {
"max_score": {
"max": {
"script": "_score"
}
}
}
}
我正在使用脚本在子聚合中查找每个存储桶的最高分数。我不知道如何使用 NEST 编写上述查询?
更新:
这是我从Elastic Community得到的答案:
With 6.x, this would be something like:
var client = new ElasticClient();
var searchResponse = client.Search<object>(s => s
.Aggregations(a => a
.Terms("UnitAggregationBucket", t => t
.Field("unitId")
.Size(10)
.Order(o => o
.Descending("maximum_score")
)
.Aggregations(aa => aa
.Max("maximum_score", m => m
.Script("_score")
)
)
)
)
);
var termsAgg = searchResponse.Aggregations.Terms("UnitAggregationBucket");
foreach(var bucket in termsAgg.Buckets)
{
// do something with buckets
var maxScore = bucket.Max("maximum_score").Value;
}
Note that you can't use max_score for the name of the aggregation as
it's a reserved keyword name in the client, which the client uses in
its heuristics based aggregation response JSON deserialization method.
原答案
我设法编写了以下 NEST 查询:
var unitAggregations = new TermsAggregation("UnitAggregationBucket")
{
Size 10,
Field = Field<MyDocument>(p => p.UnitId),
Order = new List<TermsOrder>
{
new TermsOrder()
{
Key = "max_score_in_bucket",
Order = SortOrder.Descending
}
},
Aggregations = new MaxAggregation("max_score_in_bucket", string.Empty)
{
Script = new InlineScript("_score")
}
};
产生以下 json:
"aggs": {
"UnitAggregationBucket": {
"aggs": {
"max_score_in_bucket": {
"max": {
"script": {
"source": "_score"
}
}
}
},
"terms": {
"field": "unitId",
"order": [
{
"max_score_in_bucket": "desc"
}
],
"size": 10
}
}
}
这不是我想要的确切 json,但它符合我的要求。
注意:max_score
是 Elasticsearch 中的保留关键字,所以我不得不使用不同的名称:max_score_in_bucket
我想要的是为每个 unitId
(这是我文档中的一个字段)创建一个聚合桶。我希望每个桶都按该桶中的最高分数排序。我编写了以下查询来执行我想要的操作:
"aggs": {
"UnitAggregationBucket": {
"terms": {
"field": "unitId",
"size": 10,
"order": {
"max_score": "desc"
}
},
"aggs": {
"max_score": {
"max": {
"script": "_score"
}
}
}
}
我正在使用脚本在子聚合中查找每个存储桶的最高分数。我不知道如何使用 NEST 编写上述查询?
更新:
这是我从Elastic Community得到的答案:
With 6.x, this would be something like:
var client = new ElasticClient(); var searchResponse = client.Search<object>(s => s .Aggregations(a => a .Terms("UnitAggregationBucket", t => t .Field("unitId") .Size(10) .Order(o => o .Descending("maximum_score") ) .Aggregations(aa => aa .Max("maximum_score", m => m .Script("_score") ) ) ) ) ); var termsAgg = searchResponse.Aggregations.Terms("UnitAggregationBucket"); foreach(var bucket in termsAgg.Buckets) { // do something with buckets var maxScore = bucket.Max("maximum_score").Value; }
Note that you can't use max_score for the name of the aggregation as it's a reserved keyword name in the client, which the client uses in its heuristics based aggregation response JSON deserialization method.
原答案
我设法编写了以下 NEST 查询:
var unitAggregations = new TermsAggregation("UnitAggregationBucket")
{
Size 10,
Field = Field<MyDocument>(p => p.UnitId),
Order = new List<TermsOrder>
{
new TermsOrder()
{
Key = "max_score_in_bucket",
Order = SortOrder.Descending
}
},
Aggregations = new MaxAggregation("max_score_in_bucket", string.Empty)
{
Script = new InlineScript("_score")
}
};
产生以下 json:
"aggs": {
"UnitAggregationBucket": {
"aggs": {
"max_score_in_bucket": {
"max": {
"script": {
"source": "_score"
}
}
}
},
"terms": {
"field": "unitId",
"order": [
{
"max_score_in_bucket": "desc"
}
],
"size": 10
}
}
}
这不是我想要的确切 json,但它符合我的要求。
注意:max_score
是 Elasticsearch 中的保留关键字,所以我不得不使用不同的名称:max_score_in_bucket