弹性嵌套查询返回与条款完全匹配

Question

我有一个示例机场的索引：

public class FlightIndex
{
    public int Id { get; set; }
    [keyword]
    public string Destination { get; set; }
}

Destination 字段存储 "London Airport," :London Airport (XYZ)," 和 "London Airport (ABC)."

等数据

我想搜索和 return 在 Destination 上的完全匹配。

在下面的查询中，我想要一个航班列表，其目的地与提供的目的地列表相匹配：

q.Terms(m => m.Field(f => f.Destination).Terms(parameters.Destinations
.Select(_ => _.ToLower()).ToList()));

例如，如果 parameters.Destinations 包含 "London Airport (ABC),"，则不会 return 编辑任何内容，但如果它包含 "London Airport,"，则 return 包含 "London Airport."

它似乎不适用于括号。

我不确定needs/can是否被转义。

Answer 1

听起来很像 Destination 没有被索引为 keyword 数据类型；如果是，terms 查询将 return 匹配逐字输入值。此外，括号不会产生影响，索引值将完全匹配或不匹配。

我会用 Get Mapping API 检查目标索引中的映射。

这是一个演示其工作原理的示例

var client = new ElasticClient(settings);

if (client.IndexExists("example").Exists)
{
    client.DeleteIndex("example");
}

client.CreateIndex("example", c => c
    .Mappings(m => m
        .Map<FlightIndex>(mm => mm
            .AutoMap()
        )
    )
);

client.Index(new FlightIndex { Id = 1, Destination = "London Airport (XYZ)" }, i => i
    .Index("example")
    .Refresh(Refresh.WaitFor)
);

client.Search<FlightIndex>(s => s
    .Index("example")
    .Query(q => q
        .Terms(t => t
            .Field(f => f.Destination)
            .Terms("London Airport (XYZ)")
        )
    )
);

发送以下请求并接收响应

HEAD http://localhost:9200/example?pretty=true

Status: 200

------------------------------

PUT http://localhost:9200/example?pretty=true 
{
  "mappings": {
    "flightindex": {
      "properties": {
        "id": {
          "type": "integer"
        },
        "destination": {
          "type": "keyword"
        }
      }
    }
  }
}

Status: 200

{
  "acknowledged" : true,
  "shards_acknowledged" : true,
  "index" : "example"
}

------------------------------

PUT http://localhost:9200/example/flightindex/1?pretty=true&refresh=wait_for 
{
  "id": 1,
  "destination": "London Airport (XYZ)"
}

Status: 201

{
  "_index" : "example",
  "_type" : "flightindex",
  "_id" : "1",
  "_version" : 1,
  "result" : "created",
  "_shards" : {
    "total" : 2,
    "successful" : 1,
    "failed" : 0
  },
  "_seq_no" : 0,
  "_primary_term" : 1
}

------------------------------

POST http://localhost:9200/example/flightindex/_search?pretty=true&typed_keys=true 
{
  "query": {
    "terms": {
      "destination": [
        "London Airport (XYZ)"
      ]
    }
  }
}

Status: 200

{
  "took" : 13,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "skipped" : 0,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
    "max_score" : 1.0,
    "hits" : [
      {
        "_index" : "example",
        "_type" : "flightindex",
        "_id" : "1",
        "_score" : 1.0,
        "_source" : {
          "id" : 1,
          "destination" : "London Airport (XYZ)"
        }
      }
    ]
  }
}

------------------------------

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