Question

我在Elasticsearch中有此查询。它可以正常工作，但不能按到搜索点的距离对结果进行排序。

GET /place_names/_search
{
   "query": {
    "bool" : {
        "must" : {
          "match_all" : {}
        },
    "filter" : {
      "geo_distance" : {
          "distance" : "10km",
          "location" : {
              "lat" : 64, 
              "lon" : -22
          }
        }
      }
    }
   },
    "script_fields" : {
      "id": {"script": "doc['id']"},
      "name": {"script": "doc['name']"},
      "type": {"script": "doc['type']"},
      "location": {"script": "doc['location']"},
      "dist_to_point" : {
          "script" : "doc['location'].arcDistance(64, -22)"
      }
    }
}

我想按“ dist_to_point”对结果进行排序。可能吗？

Answer 1

您可以使用内置的_geo_distance排序：

GET /place_names/_search
{
  "sort": [
    {
      "_geo_distance": {
        "location": {
          "lat": 64,
          "lon": -22
        },
        "distance_type" : "arc",
        "order": "asc"
      }
    }
  ]
}

或应用_script排序-两者等效：

GET places/_search
{
  "sort": [
    {
      "_geo_distance": {
        "location": {
          "lat": 64,
          "lon": -22
        },
        "distance_type": "arc",
        "order": "asc"
      }
    },
    {
      "_script": {
        "script": "doc['location'].arcDistance(64, -22)",
        "type": "number",
        "order": "asc"
      }
    }
  ]
}

但是您不能通过脚本字段进行排序，因为它们仅存在于与排序API分开的搜索API中（=他们彼此不了解）。

按脚本字段对Elasticsearch中的搜索结果进行排序

1 个答案: