ElasticSearch从数组字段过滤聚合 [英] ElasticSearch Filtering aggregations from array field

问题描述

我正在尝试对数组中的值进行聚合，还可以过滤前缀返回的存储区。不确定是否有可能或我滥用过滤桶。

3个文件：

  {color：[red，black，blue]} 
 {colors：[red，black]} 
 {颜色：[red]} 
  

目标是获得有颜色以字母B开头：

  {
size：0，
aggs {
colors：{
filter：{prefix：{colors：b}}，
aggs：{
颜色：{terms：{field：colors}} 
} 
} 
} 
} 
  / pre> 
 
 
结果回来包括红色不幸。显然，因为红色的文档仍然是由蓝色和/或黑色匹配的。
 聚合：{
颜色：{
doc_count：2，
top-colors：{
buckets：[
 {
key ：black，
doc_count：2 
}，
 {
key：red，
doc_count：2 
 }，
 {
key：blue，
doc_count：1 
} 
] 
} 
} 
} 
  
有没有办法只过滤桶结果？
解决方案
尝试这个，它将过滤自己创建的桶的值：
  {
size：0，
aggs：{
colors：{
filter：{
前缀：{
colors：b
} 
}，
aggs：{
top-colors：{
 条款：{
 field：colors，
include：{
pattern：b。*
} 
} 
} 
} 
} 
} 
} 
  
 
I am trying to do an aggregation on values in an array and also filter the buckets that are returned by a prefix.  Not sure if this is possible or I am misusing the filter bucket.

3 documents:
{ "colors":["red","black","blue"] }
{ "colors":["red","black"] }
{ "colors":["red"] }
The goal is to get a count of documents that have a color starting with the letter B:
{
  "size":0,
  "aggs" : {
    "colors" : {
      "filter" : { "prefix" : { "colors" : "b" } },
      "aggs" : {
        "top-colors" : { "terms" : { "field":"colors" } }
      }
    }
  }
}
The results that come back include Red unfortunately. Obviously because the documents with red still match by filter because they also have blue and/or black.
"aggregations": {
"colors": {
  "doc_count": 2,
  "top-colors": {
    "buckets": [
      {
        "key": "black",
        "doc_count": 2
      },
      {
        "key": "red",
        "doc_count": 2
      },
      {
        "key": "blue",
        "doc_count": 1
      }
    ]
  }
}
}
Is there a way to filter just the bucket results?
解决方案
Try this, it will filter the values the buckets themselves are created for:
{
  "size": 0,
  "aggs": {
    "colors": {
      "filter": {
        "prefix": {
          "colors": "b"
        }
      },
      "aggs": {
        "top-colors": {
          "terms": {
            "field": "colors",
            "include": {
              "pattern": "b.*"
            }
          }
        }
      }
    }
  }
}


                        
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