ElasticSearch Scripting:检查数组是否包含值

假设我创建了一个这样的文档:

PUT idx/type/1
{
   "the_field": [1,2,3]
}

我可以使用GET/idx/type/1检索我的文档:

{
   "_index": "idx",
   "_type": "type",
   "_id": "1",
   "_version": 1,
   "found": true,
   "_source": {
      "the_field": [
         1,
         2,
         3
      ]
   }
}

现在,我想检查字段"the_field"是否包含值2.我知道我可以使用term子句,但我需要使用过滤器脚本来检查这个,所以我试过:

POST /idx/typ/_search
{
    "query": {
        "match_all": {}
    }, 
    "filter": {
        "script": {
           "script": "doc['the_field'].values.contains(2)"
        }
    }
}

并没有得到任何结果:

{
   "took": 6,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 0,
      "max_score": null,
      "hits": []
   }
}

要测试我的mevl脚本语法是否正确,我尝试这样做:

POST /idx/type/_search
{
    "query": {
        "match_all": {}
    }, 
    "filter": {
        "script": {
           "script": "[1,2,3].contains(3)"
        }
    }
}

并得到正确的结果:

{
   "took": 1,
   "timed_out": false,
   "_shards": {
      "total": 5,
      "successful": 5,
      "failed": 0
   },
   "hits": {
      "total": 1,
      "max_score": 1,
      "hits": [
         {
            "_index": "idx",
            "_type": "type",
            "_id": "1",
            "_score": 1,
            "_source": {
               "the_field": [
                  1,
                  2,
                  3
               ]
            }
         }
      ]
   }
}

我究竟做错了什么？

我认为doc ['the_field'].值应该返回[1,2,3],不是吗？如果是这样,我的代码应该工作.

有人可以帮帮我吗？谢谢!

UPDATE

当我用["a","b","c"]替换我的代码中的所有[1,2,3]时,它可以工作.任何的想法？

它使用"a","b","c",因为the_field默认情况下存储在Elasticsearch中作为字符串而不是整数.您可以通过检查映射来验证:

 $ curl -XGET 'http://localhost:9200/idx/type/_mapping'

以下应设置适当的字段类型:

 $ curl -XPUT 'http://localhost:9200/idx/type/_mapping' -d '
 {
    "type" : {
        "properties" : {
            "the_field" : {"type" : "integer" }
         }
     }
 }

更新映射,重新索引数据并查看是否有效.如果需要,请参阅PUT Mapping API以获取其他指导.