class ActionController::ParamsWrapper::Options

def include
  return super if @include_set
  m = model
  synchronize do
    return super if @include_set
    @include_set = true
    unless super || exclude
      if m.respond_to?(:attribute_names) && m.attribute_names.any?
        self.include = m.attribute_names
      end
    end
  end
end