gistfile1.rb

=begin
  Delayed Job will let you do this:
  
  MyMailer.delay.mailer_action(args)
  
  but you can't do this because of yaml serialization:
  
  MyMailer.mailer_action(args).delay.deliver
  
  Most cases this works fine, but I need this as a before_destroy callback. my data is gone when 
  the mailer fires.
     
  Usage:
  
    mail_object = MyMailer.mailer_action(args)
    DelayedMailer.new(mail_object).deliver
    
=end
class DelayedMailer
  attr_reader :mail_object, :settings
  
  def initialize(mail_object)
    @mail_source = mail_object.to_s
    @settings = mail_object.delivery_method.settings
    self
  end
  
  def mailer
    m = Mail::Message.new(@mail_source)
    m.delivery_method ::ActionMailer::Base.delivery_method, @settings
    m
  end
  
  def deliver
    mailer.deliver
  end
  
  handle_asynchronously :deliver
  
end