Elasticsearch：匹配嵌套对象的数组

Question

示例摘自Elasticsearch参考：https://www.elastic.co/guide/en/elasticsearch/reference/5.3/nested.html

我的索引跟这个差不多。唯一的区别是 user.first 和 user.last 是 keyword 类型，所以我可以对它们使用 filter。

PUT my_index
{
  "mappings": {
    "my_type": {
      "properties": {
        "user": {
          "type": "nested" 
        }
      }
    }
  }
}

PUT my_index/my_type/1
{
  "group" : "fans",
  "user" : [
    {
      "first" : "John",
      "last" :  "Smith"
    },
    {
      "first" : "Alice",
      "last" :  "White"
    }
  ]
}

在两种情况下，我应该使用什么查询来获取与上述数组匹配的文档（恰好两项，一项是 John Smith，一项是 Alice White）：

顺序无关紧要
订单很重要

Answer 1

经过搜索，实现Order don't matter的最好方法是：索引一个Count字段。

参见：Elasticsearch Equal Exactly

原因是：

In Elasticsearch, there is no dedicated array type. Any field can contain zero or more values by default, however, all values in the array must be of the same datatype.

Elasticsearch：匹配嵌套对象的数组

Elasticsearch: match arrays of nested objects

elasticsearch

elasticsearch-5

spring-data-elasticsearch

elasticsearch-jest