class Poll::NullResult < ActiveRecord::Base

  VALID_ORIGINS = %w{web booth}

  belongs_to :author, -> { with_hidden }, class_name: 'User', foreign_key: 'author_id'
  belongs_to :booth_assignment
  belongs_to :officer_assignment

  validates :author, presence: true
  validates :origin, inclusion: {in: VALID_ORIGINS}

  scope :by_author, ->(author_id) { where(author_id: author_id) }

  before_save :update_logs

  def update_logs
    if amount_changed? && amount_was.present?
      self.amount_log += ":#{amount_was.to_s}"
      self.officer_assignment_id_log += ":#{officer_assignment_id_was.to_s}"
      self.author_id_log += ":#{author_id_was.to_s}"
    end
  end
end