gistfile1.txt

class Update < ActiveRecord::Base
    belongs_to :job_id, :foreign_key => 'job_id', :class_name => 'Job'
    file_column :attachment

  def authorized_for_destroy?
    return false if new_record?

    return Update.count(:conditions => ["created_at > ?", self.created_at]) == 0
  end
  
  def authorized_for_update?
    false
  end

    def before_create
      self.author_email = "#{current_user}@engr.uconn.edu"
    end

end