elasticsearch的查詢字符串中的符號

Question

我有一個名爲deviations的屬性的「文件」（activerecords）。該屬性具有「Bin X」「Bin $」「Bin q」「Bin％」等值。

我試圖使用輪胎/ elasticsearch搜索屬性。我正在使用空白分析器來索引偏差屬性。這裏是我創建索引的代碼：

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 

當查詢字符串不包含特殊字符時，搜索似乎正常工作。例如Bin X將只返回那些在其中包含Bin和X這些字的記錄。但是，搜索諸如Bin $或Bin %之類的東西會顯示包含字Bin的所有結果幾乎會忽略該符號（帶符號的結果在搜索中顯示的結果較高）。

這裏是我創造

def self.search(params) 
    tire.search(load: true) do 
     query { string "#{params[:term].downcase}:#{params[:query]}", default_operator: "AND" } 
     size 1000 
    end 
end 

的搜索方法，在這裏是怎麼了構建搜索表單：

<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> 

Answer 1

可以淨化你的查詢字符串。這裏是爲我試着在它扔一切正常消毒劑：

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])