在多个索引中搜索时，如何在搜索结果中获取索引名称？

问题描述

elasticsearch的“ multi-match”查询在搜索多个索引时会返回搜索结果中索引的名称。

GET localhost:9200/users,locations/_search

{
    "query":{
        "multi_match":{
            "query": "pus","type": "bool_prefix","fields":[
                "name","name._2gram","name._3gram"
            ]
        }
    }
}

响应包含_index字段，该字段说明了得出结果的索引

"hits": [{
    "_index": "locations","_type": "_doc","_id": "418","_score": 1.0,"_source": {
      "name": "pusan-kwangyokshi | korea republic of | asia","@timestamp": "2020-09-21T07:12:34.432Z"
    }
  },{
    "_index": "users","_id": "4","_source": {
      "name": "Puspjer taojomi","uniqueId": "skjhs-sklhjs125","accountStatus": 1,"email": "[email protected]","@timestamp": "2020-09-22T09:57:22.977Z"
    }
  },"_id": "52","_source": {
      "name": "Puspa yabna","uniqueId": "sjhslkj-ta18ynsarda5","email": "[email protected]","@timestamp": "2020-09-22T09:57:23.121Z"
    }
  }
]

spring-data-elasticsearch中用于hits的类是SearchHits，而SearchHit的字段id，content，score获得与Elasticsearch查询类似的数据。但是它不包含用于存储_index字段信息的相关字段。

是否支持？我需要根据哪个客户端应用程序将生成一些URL来发送搜索命中类型（_index名称）。

这是我使用spring的搜索查询

final NativeSearchQuery query = new NativeSearchQuery(QueryBuilders.multiMatchQuery(q,"name","name._3gram").type(MultiMatchQueryBuilder.Type.BOOL_PREFIX));
IndexCoordinates indexCoordinates = IndexCoordinates.of("users","locations");

return operations.search(query,OutDto.class,indexCoordinates)
        .getSearchHits()
        .stream()
        .map(SearchHit::getContent)
        .collect(Collectors.toList());


//The DTO class
public class OutDto{
  private Integer id;
  private String uniqueId;
  private String name;
  private String index;
}

解决方法

这是通过https://jira.spring.io/browse/DATAES-848实现的，并且自里程碑版本4.1.M1开始是4.1版本。

有关如何使用RC或里程碑版本的信息，请访问https://github.com/spring-projects/spring-data-elasticsearch#maven-configuration