在弹性搜索查询中格式化日期（检索期间） [英] Format date in elasticsearch query (during retrieval)

问题描述

我有一个弹性搜索索引，其中包含一个字段aDate（和许多其他字段），具有以下映射

I have a elasticsearch index with a field "aDate" (and lot of other fields) with the following mapping

"aDate" : {
        "type" : "date",
        "format" : "date_optional_time"
}

当我查询文档时，我得到一个结果，如

When i query for a document i get a result like

"aDate" : 1421179734000,

我知道这是时代，内部的java / elasticsearch日期格式，但我想结果如下：

I know this is the epoch, the internal java/elasticsearch date format, but i want to have a result like:

"aDate" : "2015-01-13T20:08:54",

我玩脚本

{  
 "query":{  
   "match_all":{  

   }
 },
 "script_fields":{  
   "aDate":{  
      "script":"if (!_source.aDate?.equals('null')) new java.text.SimpleDateFormat('yyyy-MM-dd\\'T\\'HH:mm:ss').format(new java.util.Date(_source.aDate));"
   }
 }
}

但它会产生奇怪的结果脚本基本上起作用，但aDate是返回的唯一字段，_source缺少）。这看起来像

but it give strange results (script works basically, but aDate is the only field returned and _source is missing). This looks like

"hits": [{
        "_index": "idx1",
        "_type": "type2",
        "_id": "8770",
        "_score": 1.0,
        "fields": {
            "aDate": ["2015-01-12T17:15:47"]
        }
    },

如果可能的话，会喜欢没有脚本的解决方案。

I would prefer a solution without scripting if possible.

推荐答案

当您在Elasticsearch中运行查询时，可以请求返回原始数据，例如指定字段：

When you run a query in Elasticsearch you can request it to return the raw data, for example specifying fields:

curl -XGET http://localhost:9200/myindex/date-test/_search?pretty -d '
{
 "fields" : "aDate",
 "query":{  
   "match_all":{  

   }
 }
}'

将以最初存储的格式给您日期：

Will give you the date in the format that you originally stored it:

{
  "_index" : "myindex",
  "_type" : "date-test",
  "_id" : "AUrlWNTAk1DYhbTcL2xO",
  "_score" : 1.0,
  "fields" : {
    "aDate" : [ "2015-01-13T20:08:56" ]
  }
}, {
  "_index" : "myindex",
  "_type" : "date-test",
  "_id" : "AUrlQnFgk1DYhbTcL2xM",
  "_score" : 1.0,
  "fields" : {
    "aDate" : [ 1421179734000 ]
  }

无法更改日期格式，除非您使用脚本。

It's not possible to change the date format unless you use a script.

curl -XGET http://localhost:9200/myindex/date-test/_search?pretty -d '
{  
 "query":{  
   "match_all":{ }
 },
 "script_fields":{  
   "aDate":{  
      "script":"use( groovy.time.TimeCategory ) { new Date( doc[\"aDate\"].value )  }"
   }
 }
}'

将返回：

{
  "_index" : "myindex",
  "_type" : "date-test",
  "_id" : "AUrlWNTAk1DYhbTcL2xO",
  "_score" : 1.0,
  "fields" : {
    "aDate" : [ "2015-01-13T20:08:56.000Z" ]
  }
}, {
  "_index" : "myindex",
  "_type" : "date-test",
  "_id" : "AUrlQnFgk1DYhbTcL2xM",
  "_score" : 1.0,
  "fields" : {
    "aDate" : [ "2015-01-13T20:08:54.000Z" ]
  }
}

要应用格式，请按如下方式追加：

To apply a format, append it as follows:

"script":"use( groovy.time.TimeCategory ){ new Date( doc[\"aDate\"].value ).format(\"yyyy-MM-dd\")   }"

将返回aDate：[2015-01- 13]

要显示 T ，您需要使用引号但是用Unicode代替它们：

To display the T, you'll need to use quotes but replace them with the Unicode equivalent:

"script":"use( groovy.time.TimeCategory ){ new Date( doc[\"aDate\"].value ).format(\"yyyy-MM-dd\u0027T\u0027HH:mm:ss\") }"

返回aDate：[201 5-01-13T20：08：54]

在查询中使用 _source 指定要返回的字段：

Use _source in your query to specify the fields you want to return:

curl -XGET http://localhost:9200/myindex/date-test/_search?pretty -d '
 {  "_source" : "name",
  "query":{
    "match_all":{ }
  },
  "script_fields":{
    "aDate":{
       "script":"use( groovy.time.TimeCategory ) { new Date( doc[\"aDate\"].value )  }"
    }
  }
 }'

将返回我的名称字段：

"_source":{"name":"Terry"},
  "fields" : {
    "aDate" : [ "2015-01-13T20:08:56.000Z" ]
  }

使用星号将返回所有字段，例如： _ source：*，

Using asterisk will return all fields, e.g.: "_source" : "*",

"_source":{"name":"Terry","aDate":1421179736000},
  "fields" : {
    "aDate" : [ "2015-01-13T20:08:56.000Z" ]
  }

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