如何在Go应用中的Elasticsearch中执行嵌套聚合？

import (
    "context"
    "fmt"
    "github.com/olivere/elastic/v7"
)

client, err := elastic.NewClient(elastic.SetURL("http://localhost:9200"))
if err != nil {
    // 处理错误
}

aggs := elastic.NewNestedAggregation().Path("nested_field")
aggs.SubAggregation("agg1", elastic.NewTermsAggregation().Field("nested_field.field1"))
aggs.SubAggregation("agg2", elastic.NewTermsAggregation().Field("nested_field.field2"))

searchResult, err := client.Search().
    Index("your_index").
    Aggregation("nested_agg", aggs).
    Do(context.Background())
if err != nil {
    // 处理错误
}

aggResult, found := searchResult.Aggregations.Nested("nested_agg")
if found {
    agg1Result, _ := aggResult.Terms("agg1")
    agg2Result, _ := aggResult.Terms("agg2")

    for _, bucket := range agg1Result.Buckets {
        key := bucket.Key.(string)
        count := bucket.DocCount

        // 处理聚合结果
    }

    for _, bucket := range agg2Result.Buckets {
        key := bucket.Key.(string)
        count := bucket.DocCount

        // 处理聚合结果
    }
}