Elasticsearch 如何用 script_fields 计算出来的字段进行排序？

[tumayun]

示例如下：

curl -X GET 'http://localhost:9200/users/user/_search?pretty' -d '{
  "script_fields":{
    "distance":{
      "params":{
        "lat":23.1191,
        "lon":113.31
      },
      "script":"doc[\"location\"].distanceInKm (lat, lon )",
      "lang":"groovy"
    }
  }
}
'

返回如下结果：

# 2015-08-31T14:29:46+08:00 [200] (0.005s )
#
# {
#   "took":2,
#   "timed_out":false,
#   "_shards":{
#     "total":5,
#     "successful":5,
#     "failed":0
#   },
#   "hits":{
#     "total":11,
#     "max_score":1.0,
#     "hits":[
#       {
#         "_index":"users",
#         "_type":"user",
#         "_id":"4",
#         "_score":1.0,
#         "fields":{
#           "distance":[
#             12873.486133286819
#           ]
#
# }
#       },
#      ...

请问如何用 fields.distance 进行排序？

在 sort 中，不知道如何取到 distance 的值，所以也就无法写出 sort 子句，求解惑！！

[tajpure]

参考:https://www.elastic.co/guide/en/elasticsearch/reference/current/search-uri-request.html


我一般用 Client 做查询,没怎么用过 curl. 不过以上应该可以解决 LZ 的问题.

[EPr2hh6LADQWqRVH]

es 对地理坐标有专门优化，看下文档。
看来不是任何时候 Msql 都是最成熟稳定对吧

[sunchen]

方案一
https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-function-score-query.html#score-functions?q=score

方案二
https://www.elastic.co/guide/en/elasticsearch/reference/current/search-request-sort.html

[yn]

curl -X GET 'http://localhost:9200/users/user/_search?pretty' -d '{
"sort" : [ {
"_geo_distance" : {
"location" : [ {
"lat" : 23.1191,
"lon" : 113.31
} ],
"unit" : "km",
"distance_type" : "arc"
}
}]
}'

使用这个相当于 利用 script_fields 的 distanceInKm 计算 然后排序