after_commit.rb

module AfterCommit
  def self.included(base)
    base.class_eval do
      [:save, :save!].each do |method|
        alias_method_chain method, :after_commit
      end
    end
    base.define_callbacks :after_commit, :after_commit_on_create
  end
  
  def save_with_after_commit(*args)
    previous_new_record = new_record?
    if result = save_without_after_commit(*args)
      callback(:after_commit)
      callback(:after_commit_on_create) if previous_new_record
    end
    result
  end
  
  def save_with_after_commit!(*args)
    previous_new_record = new_record?
    if result = save_without_after_commit!(*args)
      callback(:after_commit)
      callback(:after_commit_on_create) if previous_new_record
    end
    result
  end
end