elasticsearch - Elasticsearch 未生成Geohash

Question

我创建了如下索引:

POST /cabtrails
{
  "settings" :
{
  "number_of_shards" : 3,
  "number_of_replicas" : 1
 },
"mappings" : {
"cabtrail" :{
  "properties" : {
        "location": {
            "type":               "geo_point",
            "geohash_prefix":     true, 
            "geohash_precision":  "5m" 
          },
          "capture_time": {
                "type" : "long"

            },
          "client_id": {
            "type" : "long"

          }
       }
     }
   }
}

它工作正常，并创建了一个索引。

我输入了一个样本文档为:

POST cabtrails/cabtrail
{
    "capture_time": 1431849367077,
    "client_id": 865527029812357,
    "location": "13.0009316,77.5947316"
}

这也很好。
在这里，我期望ElasticSearch将生成我可以使用的geohash字段/条目。

但是，当我查询时，我得到了:

GET cabtrails/_search
{
   "took": 2,
   "timed_out": false,
   "_shards": {
      "total": 3,
      "successful": 3,
      "failed": 0
   },
   "hits": {
      "total": 1,
      "max_score": 1,
      "hits": [
         {
            "_index": "cabtrails",
            "_type": "cabtrail",
            "_id": "AU2LrEaze2aqxPjHm-UI",
            "_score": 1,
            "_source": {
               "capture_time": 1431849367077,
           "client_id": 865527029812357,
           "location": "13.0009316,77.5947316"
        }
     }
      ]
   }
}

我期望查询结果中某处有一个像u10hbp这样的geo-hash字符串，我可以用它来查询将来的位置点。还是我的geohash + ES概念搞砸了？？救命!!

Answer 1

根据geo_point索引中启用document的geohash标志，索引geohash值。

索引内容和响应的_source字段代表什么有所不同。

响应中的_source字段是原始原始json文档，已将其传递以索引到Elasticsearch。

启用geohash标志时，使用geohash表示法对geo_point类型建立索引，但实际的源文档未更改

要了解geohash标志如何补充geo_point类型的索引方式，您可以使用fielddata_fields api:

对于上面的示例，这些行看起来像:

**Query**
POST cabtrails/_search
{

    "fielddata_fields" :["location","location.geohash"]
}

响应:

"hits": {
      "total": 1,
      "max_score": 1,
      "hits": [
         {
            "_index": "cabtrails",
            "_type": "cabtrail",
            "_id": "AU2NRn_OsXnJTKeurUsn",
            "_score": 1,
            "_source": {
               "capture_time": 1431849367077,
               "client_id": 865527029812357,
               "location": "13.0009316,77.5947316"
            },
            "fields": {
               "location": [
                  {
                     "lat": 13.0009316,
                     "lon": 77.5947316
                  }
               ],
               "location.geohash": [
                  "t",
                  "td",
                  "tdr",
                  "tdr1",
                  "tdr1v",
                  "tdr1vw",
                  "tdr1vww",
                  "tdr1vwwz",
                  "tdr1vwwzb",
                  "tdr1vwwzbm"
               ]
            }
         }
      ]
   }