Prevent DataMapper resources from being destroyed

models.rb

require 'data_mapper'


module Appends
  module InstanceMethods
    # This module contains methods that we'll make available as instance
    # methods on DataMapper resources.
    def vomit
      throw :halt
    end
  end
end


# Make our module's methods available as instance methods on DataMapper
# resources.
DataMapper::Model.append_inclusions(Appends::InstanceMethods)


class Thing
  include DataMapper::Resource
  property :id, Serial
  property :created_at, DateTime
  property :updated_at, DateTime

  # Vomit before destroy, preventing destroy.
  before :destroy, :vomit
end