按对象类型字段弹性搜索的大小搜索

Question

我有这样的映射:

{
  "post": {
    "properties": {
      "author_gender": {
        "type": "string",
        "index": "not_analyzed",
        "omit_norms": true,
        "index_options": "docs"
      },
      "author_link": {
        "type": "string",
        "index": "no"
      },
      "content": {
        "type": "string"
      },
      "mentions": {
        "properties": {
          "id": {
            "type": "integer"
          },
          "name": {
            "type": "string"
          },
          "profile_image_url": {
            "type": "string"
          },
          "screen_name": {
            "type": "string"
          }
        }
      }
   }
}

我需要按mentions对象的大小进行搜索.我试过这个:

{
  "filter": {
    "script": {
      "script": "doc['mentions'].values.length == 2"
    }
  }
}

这不起作用.给出错误

嵌套:ElasticSearchIllegalArgumentException [在使用类型[post]的映射中找不到[提及]的字段];

我也试过替换脚本部分doc['mentions.id'].value.length == 2.这也是错误的

嵌套:ArrayIndexOutOfBoundsException [10];

如何查询mentions对象大小为2的记录？

Answer 1

elasticsearch指南建议使用size()而不是对象的长度.试试这个:

{
 "filter": {
   "script": {
     "script": "doc['mentions.id'].values.size() == 2"
    }
  }
}

祝一切顺利.