dbackeus/frozen.rb

## frozen.rb
class Parent
  include Mongoid::Document
  field :something, :type => String
  has_many :children
  after_create :create_child

  private
  def create_child
    children.create
  end
end

class Child
  include Mongoid::Document
  belongs_to :parent
  after_destroy :update_parent

  private
  def update_parent
    parent.update_attributes(:something => "value")
  end
end

Parent.create.children.first.destroy
	class Parent
	include Mongoid::Document
	field :something, :type => String
	has_many :children
	after_create :create_child

	private
	def create_child
	children.create
	end
	end

	class Child
	include Mongoid::Document
	belongs_to :parent
	after_destroy :update_parent

	private
	def update_parent
	parent.update_attributes(:something => "value")
	end
	end

	Parent.create.children.first.destroy