用于Elasticsearch的查询字符串中的符号
我有“文档”(活动记录),其属性称为“偏差”。该属性具有“ Bin X”,“ Bin $”,“ Bin q”,“ Bin%”等值。
我正在尝试使用tire / elasticsearch搜索属性。我正在使用空白分析器索引偏差属性。这是我用于创建索引的代码:
settings :analysis => { :filter => {
:ngram_filter => {
:type => "nGram",
:min_gram => 2,
:max_gram => 255
},
:deviation_filter => {
:type => "word_delimiter",
:type_table => ['$ => ALPHA']
}
},
:analyzer => {
:ngram_analyzer => {
:type => "custom",
:tokenizer => "standard",
:filter => ["lowercase", "ngram_filter"]
},
:deviation_analyzer => {
:type => "custom",
:tokenizer => "whitespace",
:filter => ["lowercase"]
}
}
} do
mapping do
indexes :id, :type => 'integer'
[:equipment, :step, :recipe, :details, :description].each do |attribute|
indexes attribute, :type => 'string', :analyzer => 'ngram_analyzer'
end
indexes :deviation, :analyzer => 'whitespace'
end
end
当查询字符串不包含特殊字符时,搜索似乎工作正常。例如,Bin X
将仅返回其中包含单词Bin
AND的那些记录X
。但是,搜索类似Bin
$或的Bin %
结果将显示单词Bin
几乎忽略了该符号的所有结果(带有符号的结果在没有搜索结果的搜索中会显示得更高)。
这是我创建的搜索方法
def self.search(params) tire.search(load: true) do
query { string "#{params[:term].downcase}:#{params[:query]}", default_operator: "AND" }
size 1000
end
end
这是我构建搜索表单的方式:
<div> <%= form_tag issues_path, :class=> "formtastic issue", method: :get do %>
<fieldset class="inputs">
<ol>
<li class="string input medium search query optional stringish inline">
<% opts = ["Description", "Detail","Deviation","Equipment","Recipe", "Step"] %>
<%= select_tag :term, options_for_select(opts, params[:term]) %>
<%= text_field_tag :query, params[:query] %>
<%= submit_tag "Search", name: nil, class: "btn" %>
</li>
</ol>
</fieldset>
<% end %>
</div>
回答:
您可以清理查询字符串。这是一种消毒剂,适用于我尝试扔给它的所有东西:
def sanitize_string_for_elasticsearch_string_query(str) # Escape special characters
# http://lucene.apache.org/core/old_versioned_docs/versions/2_9_1/queryparsersyntax.html#Escaping Special Characters
escaped_characters = Regexp.escape('\\/+-&|!(){}[]^~*?:')
str = str.gsub(/([#{escaped_characters}])/, '\\\\\1')
# AND, OR and NOT are used by lucene as logical operators. We need
# to escape them
['AND', 'OR', 'NOT'].each do |word|
escaped_word = word.split('').map {|char| "\\#{char}" }.join('')
str = str.gsub(/\s*\b(#{word.upcase})\b\s*/, " #{escaped_word} ")
end
# Escape odd quotes
quote_count = str.count '"'
str = str.gsub(/(.*)"(.*)/, '\1\"\3') if quote_count % 2 == 1
str
end
params[:query] = sanitize_string_for_elasticsearch_string_query(params[:query])
以上是 用于Elasticsearch的查询字符串中的符号 的全部内容, 来源链接: utcz.com/qa/422177.html