Module: Mongoid::FullTextSearch

Extended by:

ActiveSupport::Concern

Defined in:

lib/mongoid_fulltext.rb

Defined Under Namespace

Modules: ClassMethods Classes: UnknownFilterQueryOperator, UnspecifiedIndexError

Instance Method Summary

• #remove_from_ngram_index ⇒ Object
• #update_ngram_index ⇒ Object

Instance Method Details

#remove_from_ngram_index ⇒ Object

# File 'lib/mongoid_fulltext.rb', line 334

def remove_from_ngram_index
  self.mongoid_fulltext_config.each_pair do |index_name, fulltext_config|
    coll = collection.database[index_name]
    coll.find({'document_id' => self._id}).remove_all
  end
end

#update_ngram_index ⇒ Object

# File 'lib/mongoid_fulltext.rb', line 296

def update_ngram_index
  self.mongoid_fulltext_config.each_pair do |index_name, fulltext_config|
    if condition = fulltext_config[:update_if]
      case condition
      when Symbol;  next unless self.send condition
      when String;  next unless instance_eval condition
      when Proc;    next unless condition.call self
      else;         next
      end
    end

    # remove existing ngrams from external index
    coll = collection.database[index_name.to_sym]
    coll.find({'document_id' => self._id}).remove_all
    # extract ngrams from fields
    field_values = fulltext_config[:ngram_fields].map { |field| self.send(field) }
    ngrams = field_values.inject({}) { |accum, item| accum.update(self.class.all_ngrams(item, fulltext_config, false))}
    return if ngrams.empty?
    # apply filters, if necessary
    filter_values = nil
    if fulltext_config.has_key?(:filters)
      filter_values = Hash[fulltext_config[:filters].map do |key,value|
        begin
          [key, value.call(self)]
        rescue
          # Suppress any exceptions caused by filters
        end
      end.compact]
    end
    # insert new ngrams in external index
    ngrams.each_pair do |ngram, score|
      index_document = {'ngram' => ngram, 'document_id' => self._id, 'score' => score, 'class' => self.class.name}
      index_document['filter_values'] = filter_values if fulltext_config.has_key?(:filters)
      coll.insert(index_document)
    end
  end
end