module Formol
  class Poll::Vote < ActiveRecord::Base
    #Security
    attr_protected :voter_id, :option_id
    
    #Associations
    belongs_to :option, :counter_cache  => true
    belongs_to :voter,  :class_name     => Formol.config.user_class
    
    has_one :poll, :through => :option
    
    #Validations
    validates :option,  :presence => true
    validates :voter,   :presence => true
    
    #Callbacks
    after_create  :increment_poll_votes_count
    after_destroy :decrement_poll_votes_count
    
    private
    
    #Callbacks methods
    
    def increment_poll_votes_count
      Formol::Poll.increment_counter(:votes_count, poll.id)
    end
    
    def decrement_poll_votes_count
      Formol::Poll.decrement_counter(:votes_count, poll.id)
    end
  end
end