Module: Elasticsearch::Extensions::Documents::Utils

Defined in:
lib/elasticsearch/extensions/documents/utils.rb

Class Method Summary collapse

Class Method Details

.sanitize_for_query_string_query(query_string) ⇒ Object 



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# File 'lib/elasticsearch/extensions/documents/utils.rb', line 6

def self.sanitize_for_query_string_query(query_string)
  # http://stackoverflow.com/questions/16205341/symbols-in-query-string-for-elasticse
  # Escape special characters
  # http://lucene.apache.org/core/old_versioned_docs/versions/2_9_1/queryparsersyntax
  escaped_characters = Regexp.escape('/\\+-&|!(){}[]^~*?:')
  query_string = query_string.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('')
    query_string = query_string.gsub(/\s*\b(#{word.upcase})\b\s*/, " #{escaped_word} ")
  end

  # Escape odd quotes
  quote_count = query_string.count '"'
  query_string = query_string.gsub(/(.*)"(.*)/, '\1\"\2') if quote_count % 2 == 1

  query_string
end