Rails / ERB中的条件标签包装 [英] Conditional tag wrapping in Rails / ERB
本文介绍了Rails / ERB中的条件标签包装的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
用ERB编写此代码最容易理解和/或简洁的方法是什么?最好不要编写自己的方法,因为我想将更清洁的解决方案传播给公司中的其他人。
What would be the most readable and/or concise way to write this in ERB? Writing my own method isn't preferable, as I would like to spread a cleaner solution for this to others in my company.
<% @items.each do |item| %>
<% if item.isolated? %>
<div class="isolated">
<% end %>
<%= item.name.pluralize %> <%# you can't win with indentation %>
<% if item.isolated? %>
</div>
<% end %>
<% end %>
==更新==
I
def conditional_wrapper(condition=true, options={}, &block)
options[:tag] ||= :div
if condition == true
concat content_tag(options[:tag], capture(&block), options.delete_if{|k,v| k == :tag})
else
concat capture(&block)
end
end
==用法
<% @items.each do |item| %>
<% conditional_wrapper(item.isolated?, :class => "isolated") do %>
<%= item.name.pluralize %>
<% end %>
<% end %>
推荐答案
如果您真的希望DIV是有条件的,则可以做这样的事情:
If you really want the DIV to be conditional, you could do something like this:
将其放入application_helper.rb
put this in application_helper.rb
def conditional_div(options={}, &block)
if options.delete(:show_div)
concat content_tag(:div, capture(&block), options)
else
concat capture(&block)
end
end
那么您可以在自己的视图中这样使用:
which then you can use like this in your view:
<% @items.each do |item| %>
<% conditional_div(:show_div => item.isolated?, :class => 'isolated') do %>
<%= item.name.pluralize %>
<% end %>
<% end %>
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