skippable_callbacks.rb

module SkippableCallbacks
  extend ActiveSupport::Concern
  module ClassMethods
    def _skippable_callbacks
      [
        :after_initialize,
        :after_build,
        :before_validation,
        :after_validation,
        :before_create,
        :around_create,
        :after_create,
        :after_find,
        :before_update,
        :around_update,
        :after_update,
        :before_upsert,
        :around_upsert,
        :after_upsert,
        :before_save,
        :around_save,
        :after_save,
        :before_destroy,
        :around_destroy,
        :after_destroy
      ]
    end
    def _skippable_names
      _skippable_callbacks.map{ |sym| sym.to_s.split('_')[1] }.uniq
    end
    # create_callbacks = send(:get_callbacks, :create)
    # send(:reset_callbacks, :create)
    # create_callbacks == send(:get_callbacks, :create)
    # => false
    # send(:set_callbacks, :create, create_callbacks)
    # create_callbacks == send(:get_callbacks, :create)
    # => true
    def disable_callback
      create_callbacks = send(:get_callbacks, :create)
      send(:reset_callbacks, :create)
      send(:set_callbacks, :create, create_callbacks)
    end
  end
end

without__callbacks.rb

# another example
module ActiveSupport::Callbacks::ClassMethods
  def without_callback(*args, &block)
    skip_callback(*args)
    yield
    set_callback(*args)
  end
end