弹性搜索小写滤镜搜索

本文介绍了弹性搜索小写滤镜搜索的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在尝试搜索我的数据库，并且可以使用大小写过滤条款，但是我在查询的应用分析器时注意到，我可以'了解如何在筛选的搜索上应用小写分析器。这是查询：

{查询：{过滤：{filter：{bool：{should：[ {term：{language：mandarin /返回一个文档} }， {term：{language：Italian//不返回文档，如果下调} } ] } } } } }

我有一个类型语言，我已经使用下列方式：

分析器：{lower_keyword：{type：custom， tokenizer：关键字，过滤器：小写} }

相应的映射：

映射：{languages：{_id {path：languageID}，properties：{languageID：{type：integer}，language：{type：string，analyzer：lower_keyword}，native type：string，analyzer：keyword}，meta：{type：nested}，language_suggest：{type：completion} } } }

解决方案

问题是您有一个您在索引小写它，但您正在对未进行分析的查询使用术语过滤器：

术语过滤器

过滤包含术语（未分析）字段的文档。 类似于术语查询，除了它作为过滤器。

www.elasticsearch/guide/en/elasticsearch/reference/current /query-dsl-term-filter.html

我会尝试使用查询过滤器：

查询过滤器

包装任何用作过滤器的查询。可以放在接受过滤器的查询中。

示例：

查询：{query_string：{查询：{ 查询：这AND AND OR OR} } } }}

www.elasticsearch/guide/en/elasticsearch/reference/current/query-dsl-query-filter.html#query-dsl-query-过滤器

I'm trying to search my database and be able to use upper/lower case filter terms but I've noticed while query's apply analyzers, I can't figure out how to apply a lowercase analyzer on a filtered search. Here's the query:

{ "query": { "filtered": { "filter": { "bool": { "should": [ { "term": { "language": "mandarin" // Returns a doc } }, { "term": { "language": "Italian" // Does NOT return a doc, but will if lowercased } } ] } } } } }

I have a type languages that I have lowercased using:

"analyzer": { "lower_keyword": { "type": "custom", "tokenizer": "keyword", "filter": "lowercase" } }

and a corresponding mapping:

"mappings": { "languages": { "_id": { "path": "languageID" }, "properties": { "languageID": { "type": "integer" }, "language": { "type": "string", "analyzer": "lower_keyword" }, "native": { "type": "string", "analyzer": "keyword" }, "meta": { "type": "nested" }, "language_suggest": { "type": "completion" } } } }

解决方案

The problem is that you have a field that you have analyzed during index to lowercase it, but you are using a term filter for the query which is not analyzed:

Term Filter

Filters documents that have fields that contain a term (not analyzed). Similar to term query, except that it acts as a filter.

www.elasticsearch/guide/en/elasticsearch/reference/current/query-dsl-term-filter.html

I'd try using a query filter instead:

Query Filter

Wraps any query to be used as a filter. Can be placed within queries that accept a filter.

Example:

{ "constantScore" : { "filter" : { "query" : { "query_string" : { "query" : "this AND that OR thus" } } } } }

www.elasticsearch/guide/en/elasticsearch/reference/current/query-dsl-query-filter.html#query-dsl-query-filter