在弹性搜索结果中返回距离? [英] Return distance in elasticsearch results?

问题描述

我的问题类似于这个一个.

简单地说，有没有办法在不使用 _geo_distance 排序时返回地理距离?

Simply, is there a way to return the geo distance when NOT sorting with _geo_distance?

更新:澄清一下，我想要随机顺序的结果并包括距离.

Update: To clarify, I want the results in random order AND include distance.

推荐答案

是的，你可以，通过使用 脚本字段.

Yes you can, by using a script field.

例如，假设您的文档有一个名为 location 的地理点字段，您可以使用以下内容:

For instance, assuming your doc have a geo-point field called location, you could use the following:

(注意 u0027 只是一个转义的单引号，所以 u0027locationu0027 实际上是 'location')

(note the u0027 is just an escaped single quote, so u0027locationu0027 is really 'location')

curl -XGET 'http://127.0.0.1:9200/geonames/_search?pretty=1'  -d '
{
   "script_fields" : {
      "distance" : {
         "params" : {
            "lat" : 2.27,
            "lon" : 50.3
         },
         "script" : "doc[u0027locationu0027].distanceInKm(lat,lon)"
      }
   }
}
'

# [Thu Feb 16 11:20:29 2012] Response:
# {
#    "hits" : {
#       "hits" : [
#          {
#             "_score" : 1,
#             "fields" : {
#                "distance" : 466.844095463887
#             },
#             "_index" : "geonames_1318324623",
#             "_id" : "6436641_en",
#             "_type" : "place"
#          },
... etc

如果您还希望返回 _source 字段，那么您可以指定如下:

If you want the _source field to be returned as well, then you can specify that as follows:

curl -XGET 'http://127.0.0.1:9200/geonames/_search?pretty=1'  -d '
{
   "fields" : [ "_source" ],
   "script_fields" : {
      "distance" : {
         "params" : {
            "lat" : 2.27,
            "lon" : 50.3
         },
         "script" : "doc[u0027locationu0027].distanceInKm(lat,lon)"
      }
   }
}
'

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