gistfile1.rb

module TimestampsPatch
  extend ActiveSupport::Concern

  included do
    remove_method :timestamps
  end

  # Monkey patch: make timestamps not-nullable by default.
  def timestamps(*args)
    options = args.extract_options!
    options.reverse_merge!({ :null => false })
    column(:created_at, :datetime, options)
    column(:updated_at, :datetime, options)
  end
end

module ModelToIntegerConverter
  def to_i
    self.id.to_i
  end
end

ActiveRecord::ConnectionAdapters::TableDefinition.send(:include, TimestampsPatch)
ActiveRecord::ConnectionAdapters::Table.send(:include, TimestampsPatch)