cabinet.rb

class Cabinet < ActiveRecord::Base
  has_many :components do
    def front_facing
      all(:conditions => {:orientation => "A"})
    end
    
    def front_facing_grouped_by_elevation_index
      front_facing.group_by{|component| component.elevation_index - component.component_model.height + 1}
    end

    def back_facing
      all(:conditions => {:orientation => "AB"})
    end
    
    def back_facing_grouped_by_elevation_index
      front_facing.group_by{|component| component.elevation_index - component.component_model.height + 1}
    end

    def left_facing
      all(:conditions => {:orientation => "AA"})
    end
    
    def left_facing_grouped_by_elevation_index
      left_facing.group_by{|component| component.elevation_index - component.component_model.height + 1}
    end

    def right_facing
      all(:conditions => {:orientation => "A"})
    end
    
    def right_facing_grouped_by_elevation_index
      front_facing.group_by{|component| component.elevation_index - component.component_model.height + 1}
    end
  end
end