Ruby on rails 将recaptcha消息错误附加到rails errors.messages.values

我在控制器中有这样的代码：

if verify_recaptcha #verify_recaptcha(:model => @order, :message => "Oh! It's error with reCAPTCHA!") && 
      respond_to do |format|
        if @order.save
          Cart.destroy(session[:cart_id])
          session[:cart_id] = nil
          OrderMailer.order_confirmation(@order, @user).deliver
          UserOrderMailer.user_order_mailer(@order, @user).deliver
          #OrderNotifier.received(@order).deliver
          pdf_link = generate_pdf(@order)
          link = "  <a href=\"#{pdf_link}\">#{I18n.t(:get_pdf)}</a>"   
          format.html { redirect_to root_url, :notice => (I18n.t(:successful_order_send)+link.to_s).html_safe}

        else
          format.html { render :action => "new", :notice => I18n.t(:error) }
          format.xml  { render :xml => @order.errors, :status => :unprocessable_entity }

        end
      end
    else
      flash[:warning] = I18n.t(:wrong_captcha)
      redirect_to :back 
    end  

但在布局上，我也有：

- if flash[:warning]
              .warning
                = flash[:warning]
            - if flash[:notice]
              .notice
                = flash[:notice]

我想知道，我如何将recaptcha fail error追加到errors.messages.values错误列表中，并以与模型验证消息相同的div和li显示？ 我怎样才能将另一个li项目看作是TCHA消息

if verify_recaptcha
  ...
else
  @user_vehicle.errors.add(:base, I18n.t(:wrong_captcha))
end

if verify_recaptcha
  ...
else
  @user_vehicle.errors.add(:base, I18n.t(:wrong_captcha))
end