bill-transue

module Enumerable
  def collect_if
    collect { |e| yield e }.reject &:nil
  end
end

bill-transue

class Component < ActiveRecord::Base
  belongs_to :cabinet
  belongs_to :component_model
  has_many :port, :as => :device, :extend => CreatePortFromModel
  has_many :sub_components

  def elevation
    orientation + elevation_index.to_s
  end

bill-transue

class Component < ActiveRecord::Base
  has_many :sub_components

  #this is the 'other side' of the has_many :components statement
  belongs_to :component

  has_one :component
end