Elasticsearch数组必须且必须为

Question

我的弹性搜索数据库中有这样的文档:

{
   "tags"   =>   [
      "tag-1",
      "tag-2",
      "tag-3",
      "tag-A"
   ]
   "created_at"   =>"2013-07-02 12:42:19   UTC",
   "label"   =>"Mon super label"
}

我希望能够使用以下标准过滤我的文档:文档标签数组必须包含标签-1,标签-3和标签-2,但不能包含标签-A.

我试图使用bool过滤器,但我无法使其工作!

Answer 1

这是一个似乎可以达到你想要的方法:http://sense.qbox.io/gist/4dd806936f12a9668d61ce63f39cb2c284512443

首先,我创建了一个带有显式映射的索引.我做了这个,所以我可以设置"tags"属性"index": "not_analyzed".这意味着不会以任何方式修改文本,这将简化此示例的查询过程.

curl -XPUT "http://localhost:9200/test_index" -d'
{
    "mappings": {
        "docs" : {
            "properties": {
                "tags" : {
                    "type": "string",
                    "index": "not_analyzed"
                },
                "label" : {
                    "type": "string"
                }
            }
        }
    }
}'

然后添加一些文档:

curl -XPUT "http://localhost:9200/test_index/docs/1" -d'
{
    "tags" : [
        "tag-1",
        "tag-2",
        "tag-3",
        "tag-A"
    ],
    "label" : "item 1"
}'
curl -XPUT "http://localhost:9200/test_index/docs/2" -d'
{
    "tags" : [
        "tag-1",
        "tag-2",
        "tag-3"
    ],
    "label" : "item 2"
}'
curl -XPUT "http://localhost:9200/test_index/docs/3" -d'
{
    "tags" : [
        "tag-1",
        "tag-2"
    ],
    "label" : "item 3"
}'

然后我们可以在过滤器中查询using must和must_not子句,bool如下所示:

curl -XPOST "http://localhost:9200/test_index/_search" -d'
{
   "query": {
      "filtered": {
         "query": {
            "match_all": {}
         },
         "filter": {
            "bool": {
               "must": [
                  {
                     "terms": {
                        "tags": [
                           "tag-1",
                           "tag-2",
                           "tag-3"
                        ],
                        "execution" : "and"
                     }
                  }
               ],
               "must_not": [
                  {
                      "term": {
                         "tags": "tag-A"
                      }
                  }
               ]
            }
         }
      }
   }
}'

这会产生正确的结果:

{
   "took": 3,
   "timed_out": false,
   "_shards": {
      "total": 2,
      "successful": 2,
      "failed": 0
   },
   "hits": {
      "total": 1,
      "max_score": 1,
      "hits": [
         {
            "_index": "test_index",
            "_type": "docs",
            "_id": "2",
            "_score": 1,
            "_source": {
               "tags": [
                  "tag-1",
                  "tag-2",
                  "tag-3"
               ],
               "label": "item 2"
            }
         }
      ]
   }
}

请注意子句中过滤器中的"execution" : "and"参数.这意味着只返回具有所有指定的文档(而不是那些匹配一个或多个的文档).那可能是你错过的.您可以在ES文档中阅读有关选项的更多信息.termsmust"tags"

我在这里做了一个可运行的例子,你可以玩,如果你已经安装并运行了ES localhost:9200,或者你可以提供自己的端点.