如何使弹性搜索执行完全匹配查询？ [英] How to get elasticsearch to perform an exact match query?

问题描述

这是一个两部分的问题。

This is a two-part question.

我的文档如下所示：

{"url": "https://someurl.com", 
 "content": "searchable content here", 
 "hash": "c54cc9cdd4a79ca10a891b8d1b7783c295455040", 
 "headings": "more searchable content", 
 "title": "Page Title"}

我的第一个问题是如何检索所有文件，其中title是完全No Title。我不想要一个标题为此文档没有标题的文档。

My first question is how to retrieve all documents where 'title' is exactly "No Title". I don't want a document with the title of "This Document Has No Title" to appear.

我的第二个问题是如何检索出现url的所有文档

My second question is how to retrieve all documents where 'url' appears exactly in a long list of urls.

我正在使用pyelasticsearch，但curl中的一般答案也可以正常工作。

I'm using pyelasticsearch, but a generic answer in curl would also work.

推荐答案

如果你的源存储（默认是这个），你可以使用脚本过滤器

If you have your source stored (which is the default) you can use a script filter

应该去如下所示：

$ curl -XPUT localhost:9200/index/type/1 -d '{"foo": "bar"}'
$ curl -XPUT localhost:9200/index/type/2 -d '{"foo": "bar baz"}'
$ curl -XPOST localhost:9200/index/type/_search?pretty=true -d '{
"filter": {
    "script": {
        "script": "_source.foo == \"bar\""
    }
}
}'
{
  "took" : 2,
  "timed_out" : false,
  "_shards" : {
    "total" : 5,
    "successful" : 5,
    "failed" : 0
  },
  "hits" : {
    "total" : 1,
    "max_score" : 1.0,
    "hits" : [ {
      "_index" : "index",
      "_type" : "type",
      "_id" : "1",
      "_score" : 1.0, "_source" : {"foo": "bar"}
    } ]
  }
}

编辑：我认为值得一提的是，not_analyzed映射应该是更快的方法。但是，如果你想要这个字段的确切和部分匹配，我看到两个选项：使用脚本或索引数据两次（一旦分析，一旦没有分析）。

EDIT: I think it's worth mentioning that the "not_analyzed" mapping should be the faster approach. But if you want both exact and partial matches for this field, I see two options: use scripts or index the data twice (once analyzed, once not analyzed).

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