elasticsearch - 按对象类型字段 Elasticsearch 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"
          }
        }
      }
   }
}

我需要根据 mentions 对象的大小进行搜索。我试过这个:

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

这是行不通的。报错

nested: ElasticSearchIllegalArgumentException[No field found for [mentions] in mapping with types [post]];

我还尝试用 doc['mentions.id'].value.length == 2 替换脚本部分。也是报错

nested: ArrayIndexOutOfBoundsException[10];

如何查询 mentions 对象大小为 2 的记录？

Answer 1

elasticsearch 指南建议对对象使用 size() 而不是 length。所以试试这个:

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

祝一切顺利