Rails检查是否在content_for中定义了yield:area [英] Rails check if yield :area is defined in content_for

问题描述

我想根据已定义的实际模板在布局级别进行条件渲染，知道如何完成此工作吗?

I want to do a conditional rendering at the layout level based on the actual template has defined content_for(:an__area), any idea how to get this done?

推荐答案

@content_for_whatever已弃用. 改为使用content_for?，

@content_for_whatever is deprecated. Use content_for? instead, like this:

<% if content_for?(:whatever) %>
  <div><%= yield(:whatever) %></div>
<% end %>

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