activerecord/test/models/bird.rb


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class Bird < ActiveRecord::Base
  belongs_to :pirate
  validates_presence_of :name

  accepts_nested_attributes_for :pirate

  attr_accessor :cancel_save_from_callback
  before_save :cancel_save_callback_method, :if => :cancel_save_from_callback
  def cancel_save_callback_method
    throw(:abort)
  end
end