module ActionView::Helpers::ActiveModelInstanceTag

def error_message
  object.errors[@method_name]
end

def error_wrapping(html_tag)
  if object_has_errors?
    Base.field_error_proc.call(html_tag, self)
  else
    html_tag
  end
end

def object
  @active_model_object ||= begin
    object = super
    object.respond_to?(:to_model) ? object.to_model : object
  end
end

def object_has_errors?
  object.respond_to?(:errors) && object.errors.respond_to?(:full_messages) && error_message.any?
end

def tag(type, options, *)
  tag_generate_errors?(options) ? error_wrapping(super) : super
end

def tag_generate_errors?(options)
  options['type'] != 'hidden'
end