Module: Mongoid::Search::ClassMethods

Defined in:
lib/mongoid_search/mongoid_search.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#index_keywords! ⇒ Object

Goes through all documents in the class that includes Mongoid::Search and indexes the keywords.



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# File 'lib/mongoid_search/mongoid_search.rb', line 108

def index_keywords!
  all.each { |d| d.index_keywords! ? MongoidSearch::Log.green(".") : MongoidSearch::Log.red("F") }
end

#keyword_stemmer(options = {}) ⇒ Object 



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# File 'lib/mongoid_search/mongoid_search.rb', line 60

def keyword_stemmer(options={})
  stemmer_class.new(:language => options[:language]) if stem_keywords
end

#search(query, options = {}) ⇒ Object Also known as: csearch 



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# File 'lib/mongoid_search/mongoid_search.rb', line 43

def search(query, options={})
  if relevant_search
    search_relevant(query, options)
  else
    search_without_relevance(query, options)
  end
end

#search_in(*args) ⇒ Object

Set a field or a number of fields as sources for search



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# File 'lib/mongoid_search/mongoid_search.rb', line 21

def search_in(*args)
  options = args.last.is_a?(Hash) && [:match, :allow_empty_search, :relevant_search, :stem_keywords, :ignore_list].include?(args.last.keys.first) ? args.pop : {}
  self.match              = [:any, :all].include?(options[:match]) ? options[:match] : :any
  self.allow_empty_search = [true, false].include?(options[:allow_empty_search]) ? options[:allow_empty_search] : false
  self.relevant_search    = [true, false].include?(options[:relevant_search]) ? options[:relevant_search] : false
  self.stemmer_class      = options[:stemmer_class]
  self.stem_keywords      = !!stemmer_class || options[:stem_keywords]
  self.stemmer_class    ||= MongoidSearch::Stemmers.available

  if stem_keywords && stemmer_class.nil?
    raise "No stemmer found. Please, install either fast-stemmer or ruby-stemmer."
  end

  self.ignore_list        = YAML.load(File.open(options[:ignore_list]))["ignorelist"] if options[:ignore_list].present?
  self.search_fields      = (self.search_fields || []).concat args

  field :_keywords, :type => Array
  index :_keywords, :background => true

  before_save :set_keywords
end

#search_relevant(query, options = {}) ⇒ Object 



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# File 'lib/mongoid_search/mongoid_search.rb', line 64

def search_relevant(query, options={})
  return criteria.all if query.blank? && allow_empty_search

  keywords = MongoidSearch::Util.normalize_keywords(query, keyword_stemmer(options), ignore_list)

  map = <<-EOS
    function() {
      var entries = 0
      for(i in keywords)
        for(j in this._keywords) {
          if(this._keywords[j] == keywords[i])
            entries++
        }
      if(entries > 0)
        emit(this._id, entries)
    }
  EOS
  reduce = <<-EOS
    function(key, values) {
      return(values[0])
    }
  EOS

  #raise [self.class, self.inspect].inspect

  kw_conditions = keywords.map do |kw|
    {:_keywords => kw}
  end

  criteria = (criteria || self).any_of(*kw_conditions)

  query = criteria.selector

  options.delete(:limit)
  options.delete(:skip)
  options.merge! :scope => {:keywords => keywords}, :query => query

  # res = collection.map_reduce(map, reduce, options)
  # res.find.sort(['value', -1]) # Cursor
  collection.map_reduce(map, reduce, options)
end

#search_without_relevance(query, options = {}) ⇒ Object 



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# File 'lib/mongoid_search/mongoid_search.rb', line 55

def search_without_relevance(query, options={})
  return criteria.all if query.blank? && allow_empty_search
  criteria.send("#{(options[:match]||self.match).to_s}_in", :_keywords => MongoidSearch::Util.normalize_keywords(query, keyword_stemmer(options), ignore_list).map { |q| /#{q}/ })
end