Question

我的问题是：这个帮助器将在视图中使用，并且还会向＆＃39; li＆＃39;添加类。元素，除了类＆＃39; red＆＃39;，如果满足以下条件，则应添加该元素。有没有人看到我需要改变的东西来使这项工作？

def navigation_item_with_message(body, url, options = {})
count = options.delete(:count) || 0
body = "#{body} (#{count})"
li_classes = ['ribbon', 'ribbon-inprogress']
li_classes << options[:li_class] = 'red' if count > 0 navigation_item(body, url, options)
li_classes.join(' ')
end

Answer 1

我不确定您提供的代码段是什么，因为我看不到navigation_item的实现。然而，这是一种做你想做的事情的方法：

li_classes = ['ribbon', 'ribbon-inprogress']
li_classes << 'red' if count > 0
li_classes.join(' ')
# You can also do
# li_classes = "ribbon ribbon-inprogress #{count > 0 ? 'red' : ''}"
content_tag(:li, class: li_classes) do
  # function that returns an HTML or plain string
end

Answer 2

所以我想出了如何解决它。

def navigation_item_with_message(body, url, options = {})
 count = options.delete(:count) || 0
 body = "#{body} (#{count})"
 li_classes = [options[:li_class]]
 li_classes << 'red' if count > 0
 options.merge!(:li_class => li_classes.join(' '))
 navigation_item(body, url, options)
end

使用辅助方法ruby将类添加到<li>元素

2 个答案: