period.rb

class Period < ActiveRecord::Base
  belongs_to :show

  def show_date
    start_at.nil? ? Time.now.to_date : start_at.to_date
  end
  def start_at_time
    start_at.nil? ? Time.now.to_time : start_at.to_time
  end
  def end_at_time
    end_at.nil? ? Time.now.to_time : end_at.to_time
  end

  def start_at_time=(start_str)
  	self.start_at = BLAAALALALAL
  end

  def end_at_time=(end_str)
  	self.end_at = BLAAALALALAL
  end
end