elastic search 5.x地理距离查询返回距离

{
  "query": {
    "function_score": {
      "query": {
        "match_all": {}
      },
      "functions": [
        {
          "filter": {
            "geo_distance": {
              "distance": "10km",
              "location": {
                "lat": 40.7128,
                "lon": -74.0060
              }
            }
          },
          "weight": 1
        }
      ],
      "score_mode": "sum",
      "boost_mode": "replace"
    }
  },
  "script_fields": {
    "distance": {
      "script": {
        "lang": "painless",
        "source": "doc['location'].distanceInKm(40.7128, -74.0060)"
      }
    }
  },
  "_source": ["_id", "name", "location"]
}

{
  "mappings": {
    "properties": {
      "location": {
        "type": "geo_point"
      }
    }
  }
}