elasticsearch ElasticSearch查询/搜索/匹配

我在ElasticSearch索引中插入了3条记录，如下所示：

curl -XPOST 'http://127.0.0.1:9200/geoindex_test/STREET?pretty=1'  -d '
{ "cityNames" : [ { "language" : "ENG",
    "name" : "w bridgewater",
    "raw_name" : "W BRIDGEWATER"
  },
  { "language" : "ENG",
    "name" : "west bridgewater",
    "raw_name" : "West Bridgewater"
  }
],
"id" : 1,
  "streetNames" : [ { "language" : "ENG",
    "name" : "cram rd",
    "raw_name" : "Cram Rd"
  } ]
}'

curl -XPOST 'http://127.0.0.1:9200/geoindex_test/STREET?pretty=1'  -d '
{ "cityNames" : [ { "language" : "ENG",
    "name" : "bridgewater corners",
    "raw_name" : "BRIDGEWATER CORNERS"
  },
  { "language" : "ENG",
    "name" : "bridgewater center",
    "raw_name" : "Bridgewater Center"
  }
],
"id" : 2,
"streetNames" : [ { "language" : "ENG",
    "name" : "valley view rd",
    "raw_name" : "Valley View Rd"
  } ]
}'

curl -XPOST 'http://127.0.0.1:9200/geoindex_test/STREET?pretty=1'  -d '
{ "cityNames" : [ { "language" : "ENG",
    "name" : "bridgewater",
    "raw_name" : "Bridgewater"
  },
  { "language" : "ENG",
    "name" : "windsor",
    "raw_name" : "Windsor"
  }
],
"id" : 3,
"streetNames" : [ { "language" : "ENG",
    "name" : "valley view rd",
    "raw_name" : "Valley View Rd"
  } ]
}'

curl -XGET 'http://127.0.0.1:9200/geoindex_test/STREET/_search?pretty=1'  -d '
{
"query" : {
    "match" : { "cityNames.name" : "bridgewater" }
}
}'

我执行如下搜索：

curl -XPOST 'http://127.0.0.1:9200/geoindex_test/STREET?pretty=1'  -d '
{ "cityNames" : [ { "language" : "ENG",
    "name" : "w bridgewater",
    "raw_name" : "W BRIDGEWATER"
  },
  { "language" : "ENG",
    "name" : "west bridgewater",
    "raw_name" : "West Bridgewater"
  }
],
"id" : 1,
  "streetNames" : [ { "language" : "ENG",
    "name" : "cram rd",
    "raw_name" : "Cram Rd"
  } ]
}'

curl -XPOST 'http://127.0.0.1:9200/geoindex_test/STREET?pretty=1'  -d '
{ "cityNames" : [ { "language" : "ENG",
    "name" : "bridgewater corners",
    "raw_name" : "BRIDGEWATER CORNERS"
  },
  { "language" : "ENG",
    "name" : "bridgewater center",
    "raw_name" : "Bridgewater Center"
  }
],
"id" : 2,
"streetNames" : [ { "language" : "ENG",
    "name" : "valley view rd",
    "raw_name" : "Valley View Rd"
  } ]
}'

curl -XPOST 'http://127.0.0.1:9200/geoindex_test/STREET?pretty=1'  -d '
{ "cityNames" : [ { "language" : "ENG",
    "name" : "bridgewater",
    "raw_name" : "Bridgewater"
  },
  { "language" : "ENG",
    "name" : "windsor",
    "raw_name" : "Windsor"
  }
],
"id" : 3,
"streetNames" : [ { "language" : "ENG",
    "name" : "valley view rd",
    "raw_name" : "Valley View Rd"
  } ]
}'

curl -XGET 'http://127.0.0.1:9200/geoindex_test/STREET/_search?pretty=1'  -d '
{
"query" : {
    "match" : { "cityNames.name" : "bridgewater" }
}
}'

---

我认为ElasticSearch将返回第三条记录（id==3）作为最佳匹配（记录3是唯一与“bridgewater”完全匹配的记录），但它将返回id 1（w bridgewater）的记录作为最佳匹配。我做错了什么？

我想这是因为你使用的是内部对象，基本上是将它下面的对象折叠成一个，用于搜索目的。因此，当您查询对象1的搜索字段时，例如，您查询的是[“w bridgewater”，“west bridgewater”]，而不是您可能想象的离散字段

由于“bridgewater”在对象1和2（两个名称字段）中出现两次，而在对象3中出现一次，因此这些项目在搜索中排名较高。最终会拾取对象1，因为“bridgewater”出现的字段比对象2中的字符串短（“w bridgewater”与“bridgewater角”）

---

不要像现在这样使用内部对象，而是使用嵌套对象。将分数模式设置为“max”将使您更直观地了解情况。

您可以看到关于在请求中启用解释输出的原因的详细说明。只需将

explain=true

请求参数添加到url。如果您能将输出添加到您的答案中，我将很乐意为您提供帮助。@javanna-谢谢您的回复。explain=true的输出超出了stackoverflow允许的字符数。抱歉，我无法提供信息。也许你可以发布相关部分或使用第三方服务，如pastebin或github gist。@javanna-我以前从未使用过pastebin。希望你能访问我的帖子：你得到的答案非常好。正如你所看到的，你的前两份文件都有tf（术语频率）2，原因与答案中所解释的完全相同。第三个文档的fieldNorm更高，这是表明它是完美匹配的因素，但由于术语频率只有一个，其他文档更相关。你知道吗？我喜欢你编辑答案的方式，有道理！即使看到解释的输出总是有帮助的！