Module: Mongoid::Haystack

Extended by:
Haystack, Util
Included in:
Haystack
Defined in:
lib/mongoid-haystack.rb,
lib/mongoid-haystack/util.rb,
lib/mongoid-haystack/index.rb,
lib/mongoid-haystack/token.rb,
lib/mongoid-haystack/search.rb,
lib/mongoid-haystack/sequence.rb,
lib/mongoid-haystack/stemming.rb

Defined Under Namespace

Modules: Denormalization, Pagination, Search, Stemming, Util Classes: Engine, Index, Sequence, Token

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Util

connect!, create_indexes, destroy_all, find_or_create, models, phrases_for, reset!, stems_for, stopword?, strip!, token_tree_for, tokens_for, words_for

Class Method Details

.denormalize(results) ⇒ Object 



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# File 'lib/mongoid-haystack/search.rb', line 232

def Haystack.denormalize(results)
  queries = Hash.new{|h,k| h[k] = []}

  results.each do |result|
    model_type = result[:model_type]
    model_id = result[:model_id]
    model_class = eval(model_type) rescue next
    queries[model_class].push(model_id)
  end

=begin
  index = Hash.new{|h,k| h[k] = {}}
=end

  models =
    queries.map do |model_class, model_ids|
      model_class_models =
        begin
          model_class.find(model_ids)
        rescue Mongoid::Errors::DocumentNotFound
          model_ids.map do |model_id|
            begin
              model_class.find(model_id)
            rescue Mongoid::Errors::DocumentNotFound
              nil
            end
          end
        end

=begin
      model_class_models.each do |model|
        index[model.class.name] ||= Hash.new
        next unless model
        index[model.class.name][model.id.to_s] = model
      end
=end

      model_class_models
    end

  models.flatten!
  models.compact!
  models

=begin
  to_ignore = []

  results.each_with_index do |result, i|
    model = index[result['model_type']][result['model_id'].to_s]

    if model.nil?
      to_ignore.push(i)
      next
    else
      result.model = model
    end

    result.model
    result
  end

  to_ignore.reverse.each do |index|
    models.delete_at(index)
  end
=end

  models
end

.dependencies ⇒ Object 



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# File 'lib/mongoid-haystack.rb', line 12

def dependencies
  {
    'mongoid'       => [ 'mongoid'       , '~> 3.0' ] , 
    'moped'         => [ 'moped'         , '~> 1.3' ] , 
    'origin'        => [ 'origin'        , '~> 1.0' ] , 
    'map'           => [ 'map'           , '~> 6.2' ] , 
    'fattr'         => [ 'fattr'         , '~> 2.2' ] , 
    'coerce'        => [ 'coerce'        , '~> 0.0' ] , 
    'unicode_utils' => [ 'unicode_utils' , '~> 1.4' ] , 
  }
end

.expand(*args, &block) ⇒ Object 



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# File 'lib/mongoid-haystack/search.rb', line 301

def Haystack.expand(*args, &block)
  Haystack.denormalize(*args, &block)
end

.included(other) ⇒ Object 



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# File 'lib/mongoid-haystack.rb', line 83

def Haystack.included(other)
  other.send(:include, Search)
end

.index(*args, &block) ⇒ Object 



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# File 'lib/mongoid-haystack/index.rb', line 3

def Haystack.index(*args, &block)
  Index.add(*args, &block)
end

.libdir(*args, &block) ⇒ Object 



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# File 'lib/mongoid-haystack.rb', line 24

def libdir(*args, &block)
  @libdir ||= File.expand_path(__FILE__).sub(/\.rb$/,'')
  args.empty? ? @libdir : File.join(@libdir, *args)
ensure
  if block
    begin
      $LOAD_PATH.unshift(@libdir)
      block.call()
    ensure
      $LOAD_PATH.shift()
    end
  end
end

.load(*libs) ⇒ Object 



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# File 'lib/mongoid-haystack.rb', line 38

def load(*libs)
  libs = libs.join(' ').scan(/[^\s+]+/)
  libdir{ libs.each{|lib| Kernel.load(lib) } }
end

.models_for(*args, &block) ⇒ Object 



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# File 'lib/mongoid-haystack/search.rb', line 305

def Haystack.models_for(*args, &block)
  Haystack.denormalize(*args, &block)
end

.reindex!(*args, &block) ⇒ Object 



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# File 'lib/mongoid-haystack/index.rb', line 11

def Haystack.reindex!(*args, &block)
  Index.all.each do |index|
    model =
      begin
        index.model
      rescue Object => e
        index.destroy
        next
      end

    index(model)
  end
end

.unindex(*args, &block) ⇒ Object 



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# File 'lib/mongoid-haystack/index.rb', line 7

def Haystack.unindex(*args, &block)
  Index.remove(*args, &block)
end

.version ⇒ Object 



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# File 'lib/mongoid-haystack.rb', line 8

def version
  const_get :Version
end

Instance Method Details

#search(*args, &block) ⇒ Object 



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# File 'lib/mongoid-haystack/search.rb', line 66

def search(*args, &block)
#
  options = Map.options_for!(args)
  search = args.join(' ')

  conditions = {}
  order = []

  op = :token_ids.in

#
  case
    when options[:all]
      op = :token_ids.all
      search += Coerce.string(options[:all])

    when options[:any]
      op = :token_ids.in
      search += Coerce.string(options[:any])

    when options[:in]
      op = :token_ids.in
      search += Coerce.string(options[:in])
  end

#
  tokens = search_tokens_for(search)
  token_ids = tokens.map{|token| token.id}

#
  conditions[op] = token_ids

#
  order.push(["score", :desc])

  tokens.each do |token|
    order.push(["keyword_scores.#{ token.id }", :desc])
  end

  tokens.each do |token|
    order.push(["fulltext_scores.#{ token.id }", :desc])
  end

  order.push(["size", :asc])

#
  if options[:facets]
    conditions[:facets] = {'$elemMatch' => options[:facets]}
  end

#
  if options[:types]
    model_types = Array(options[:types]).map{|type| type.name}
    conditions[:model_type.in] = model_types
  end

#
  query =
    Index.where(conditions)
      .order_by(order)
        .only(:_id, :model_type, :model_id)

  query.extend(Pagination)

  query.extend(Denormalization)

  query
end

#search_tokens_for(search) ⇒ Object 



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# File 'lib/mongoid-haystack/search.rb', line 210

def search_tokens_for(search)
  values = Token.values_for(search.to_s)
  tokens = []

  Token.where(:value.in => values).each do |token|
    index = values.index(token.value)
    tokens[index] = token
  end

  total = Token.total.to_f

  rarity = {}
  tokens.map{|token| rarity[token] = token.rarity_bin(total)}

  position = {}
  tokens.each_with_index{|token, i| position[token] = i + 1}

  tokens.sort!{ |a, b| [rarity[b], position[a]] <=> [rarity[a], position[b]] }

  tokens
end