acts_as_solr(
    :fields => [
      :name,
      :keywords,
      :comment,
      :description_brief,
      :description_ext,
      :description_full,
      :other_remarks,
      :active,
      :featured,
      {:price => :range_float},
      {:activity_type => {:type => :facet, :multivalued => true}},
    ],
    :include => [
      {:peak15_supplier           => {:using => :name,  :as => :supplier}},
      {:regions                   => {:using => :name,  :type => :facet, :multivalued => true}},
      {:subregions                => {:using => :name,  :type => :facet, :multivalued => true}},
      {:destinations              => {:using => :name,  :type => :facet, :multivalued => true}},
      {:activities                => {:using => :name,  :type => :facet, :multivalued => true}},
      {:travel_types              => {:using => :name,  :type => :facet, :multivalued => true}},
      {:comfort_level             => {:using => :value, :type => :range_integer}},
      {:physical_difficulty_level => {:using => :value, :type => :range_integer}},
      {:peak15_departures         => {:using => lambda {|d| d.start_date.strftime('%Y%m%d')}, :multivalued => true, :as => :departure}},
    ]
  )