Original_-_motion.rb

class Motion < ActiveRecord::Base
  belongs_to :member

  has_many :events

  validates_inclusion_of :state, :in =>
    %w(waitingsecond waitingexpedited waitingobjection
       objected voting passed failed approved)

  def seconds
    events.where(:type => "second").count
  end

  def ayes
    events.where(:type => "vote", :value => true).count
  end

  def nays
    events.where(:type => "vote", :value => false).count
  end

  def required_votes
    possible_votes / 2 + 1
  end

  def seconds_for_expediting
    possible_votes / 3
  end

  def second(member)
    # TODO: Members cannot second their own motions

    events.create(:member => member, :type => "second")

    second_count = seconds

    if state == "waitingsecond" && second_count >= 2
      waitingobjection!
    elsif state == "waitingexpedited" && second_count >= seconds_for_expediting
      voting!
    end
  end

  def vote(member, value)
    events.create(:member => member, :type => "vote", :value => value)
    passed! if ayes > required_votes
  end

STI-but-not-Rails-STI_-_motion.rb

  belongs_to  :member
  has_many    :seconds, :class_name => :events,
                        :select     => "type = second"

  has_many    :votes,   :class_name => :events,
                        :conditions => "type = vote"  do
    # @return [ActiveRecord::Relation] An Array-like structure, of all aye-votes cast
    def yeas
      where :value => true
    end

    # @return [ActiveRecord::Relation] An Array-like structure, of all nay-votes cast
    def nays
      where :value => false
    end
  end

  # @return [Fixnum] The current count of yea votes
  def yeas
    votes.yeas.count
  end
  alias :ayes :yeas

  # @return [Fixnum] The current count of nay votes
  def nays
    votes.nays.count
  end

STI_-_motion.rb

  belongs_to  :member
  has_many    :seconds
  has_many    :votes  do
    # @return [ActiveRecord::Relation] An Array-like structure, of all aye-votes cast
    def yeas
      where :value => true
    end

    # @return [ActiveRecord::Relation] An Array-like structure, of all nay-votes cast
    def nays
      where :value => false
    end
  end

  # @return [Fixnum] The current count of yea votes
  def yeas
    votes.yeas.count
  end
  alias :ayes :yeas

  # @return [Fixnum] The current count of nay votes
  def nays
    votes.nays.count
  end

  # @return [Fixnum] The number of votes required to pass this Motion
  def required_votes
    possible_votes / 2 + 1
  end

  # @return [true, false] Whether or not Motion has met its requirement for passage
  def has_met_requirement?
    yeas >= required_votes
  end

  # @return [Fixnum] The numbers of seconds required to expedite
  def seconds_for_expedition
    possible_votes / 3
  end
  alias :seconds_for_expediting :seconds_for_expedition

  # Second this Motion
  #   @param [Member] member The member who is seconding this motion
  #   @return [true, false] Whether or not the second was accepted
  # @TODO @return
  def second(member)
    seconds.create(:member => member)

    second_count = seconds

    if state == "waitingsecond" && second_count >= 2
      waitingobjection!
    elsif state == "waitingexpedited" && second_count >= seconds_for_expediting
      voting!
    end
  end

  # Cast a Member's Vote
  #   @param [Member] member An active member
  #   @param [true, false] value An aye or nay vote
  #   @return [true, false] Whether or not the vote was accepted
  # @TODO @return
  def vote(member, value)
    votes.create(:member => member, :value => value)
    passed! if ayes > required_votes
  end