弹性搜索小写滤镜搜索 [英] Elasticsearch lowercase filter search

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。

http://www.elasticsearch.org/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
}
}
}
}}

http://www.elasticsearch.org/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.

http://www.elasticsearch.org/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"
                }
            }
        }
    } }

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

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