如何使 Searchkick/Elasticsearch where 子句不区分大小写？

Question

我将 ElasticSearch 与 Ruby (Searchkick) 一起使用。目前，默认情况下 where 过滤器区分大小写。

我将 ElasticSearch 与我的 EquityContract 模型一起使用，所以一旦我搜索 Food，我会得到不同的结果来搜索 food。

    [21] pry(main)> EquityContract.search('*', {:load=>false, :where=>{:industry=>"FOOD"}, limit:1})
effective_url=http://127.0.0.1:9200/equity_contracts_development/_search response_code=200 return_code=ok total_time=0.002279
      EquityContract Search (5.9ms)  curl http://127.0.0.1:9200/equity_contracts_development/_search?pretty -d '{"query":{"filtered":{"query":{"match_all":{}},"filter":{"and":[{"term":{"industry":"FOOD"}}]}}},"size":1,"from":0}'
    => #<Searchkick::Results:0x0000010b65c5c8
     @klass=
      EquityContract(id: integer, ticker: text, name: string, country: string, currency: string, instrument: string),
     @options=
      {:page=>1,
       :per_page=>1,
       :padding=>0,
       :load=>false,
       :includes=>nil,
       :json=>false,
       :match_suffix=>"analyzed",
       :highlighted_fields=>[]},
     @response=
      {"took"=>1,
       "timed_out"=>false,
       "_shards"=>{"total"=>5, "successful"=>5, "failed"=>0},
       "hits"=>{"total"=>0, "max_score"=>nil, "hits"=>[]}}>

当我对Food 做同样的事情时，我得到了一些结果：

[23] pry(main)> EquityContract.search('*', {:load=>false, :where=>{:industry=>"Food"}, limit:1})
ETHON: performed EASY effective_url=http://127.0.0.1:9200/equity_contracts_development/_search response_code=200 return_code=ok total_time=0.002795
  EquityContract Search (7.5ms)  curl http://127.0.0.1:9200/equity_contracts_development/_search?pretty -d '{"query":{"filtered":{"query":{"match_all":{}},"filter":{"and":[{"term":{"industry":"Food"}}]}}},"size":1,"from":0}'
=> #<Searchkick::Results:0x000001112d1880
 @klass=
  EquityContract(id: integer, ticker: text, name: string, country: string, currency: string, instrument: string),
 @options=
  {:page=>1,
   :per_page=>1,
   :padding=>0,
   :load=>false,
   :includes=>nil,
   :json=>false,
   :match_suffix=>"analyzed",
   :highlighted_fields=>[]},
 @response=
  {"took"=>1,
   "timed_out"=>false,
   "_shards"=>{"total"=>5, "successful"=>5, "failed"=>0},
   "hits"=>
    {"total"=>73,
     "max_score"=>1.0,
     "hits"=>
      [{"_index"=>"equity_contracts_development_20160320195353552",
        "_type"=>"equity_contract",
        "_id"=>"1181",
        "_score"=>1.0,
        "_source"=>
         {"name"=>"Some name",
          "ticker"=>"some ticker",
          "country"=>"SA",

如何更改它以使其更不区分大小写，以便两者的结果相同？

Answer 1

我看到 Searchkiq 生成词条查询，但您需要的是全文查询。我不熟悉 Searchkiq，所以我不能告诉你怎么做。

根据the documentation on ElasticSearch official website，

词条查询

term 或 fuzz 等查询是没有分析阶段的低级查询。他们在一个任期内运作。术语 Foo 的术语查询在倒排索引中查找该确切术语，并计算包含该术语的每个文档的 TF/IDF 相关性_score。

全文查询

像match 或query_string 这样的查询是了解字段映射的高级查询...如果您查询全文（已分析）字段，它们将首先将查询字符串通过适当的分析器来生成要查询的术语列表。