设计宝石闪光消息 [英] devise gem flash messages

问题描述

如果我使用带有 rails 的设计 gem，我如何让 flash 消息仅在其中包含内容时显示.

if i am using the devise gem with rails, how do i make the flash messages appear only when theres content inside of it.

rails 是否有一种简单的方法可以做到这一点，还是我需要在 jquery 中手动完成?

does rails have an easy way to do this or do i manually need to do it in jquery?

目前我使用 twitter bootstrap v2，默认情况下内置了它们.顺便说一下，这是我能想到的最好的 jquery，我不确定如何更好地重构它(尽管我肯定知道它可能是).我不得不这样做，因为我在 <p> flash

currently im using twitter bootstrap v2 and it has them built in by default. here is the best jquery i could come up with by the way, im not sure how this could be refactored better (although i definitely know it could be). I had to do it like this because i have an 'x' inside the <p> flash

if($('.alert-success').clone().children().remove().end().text() != "") {
    $('.alert-success').fadeIn();
  }
  if($('.alert-error').clone().children().remove().end().text() != "") {
    $('.alert-error').fadeIn();
  }

我的布局包含:

<p class="alert alert-success"><a class="close" data-dismiss="alert">&times;</a><%= notice %></p>
<p class="alert alert-error"><a class="close" data-dismiss="alert">&times;</a><%= alert %></p>

推荐答案

这里没有特殊的方法，我只是用周围的 if 来控制这些标签的输出方式:

No special methods here, I'd simply control how those tags are output with a surrounding if:

<% if notice %><p class="alert alert-success"><a class="close" data-dismiss="alert">&times;</a><%= notice %></p><% end %>
<% if alert %><p class="alert alert-error"><a class="close" data-dismiss="alert">&times;</a><%= alert %></p><% end %>

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