content_for在开发中起作用，但在生产中不起作用？
我有一个使用caches_action的控制器
I have a controller using caches_action
controllers / bar_controller.rb：
caches_action :bar, :layout => false
，鉴于此操作，我将在布局中设置html标题。
and in the view of this action, I'ill setting html title in layout.
views / foo / bar.html.erb：
<%= content_for :mytitle do "testing" end %>
这是我的布局文件：
views / layouts / application.html.erb：
<title><%= yield :mytitle %></title>
但是，这仅在开发中有效。在生产中，它不起作用。任何想法表示赞赏。
However, this only work in development. In production, it does not work. Any idea is appreciated. thanks.
similar question: Is there a workaround for ignored content_for blocks with caches_action and :layout => false?
在启用缓存的环境中，Rails只会忽略content_for块。使用 ActionController :: Filters 计算值并将这些值存储在实例变量中。在布局中引用实例变量。
Rails will simply ignore the content_for block in caching enabled environment. Use ActionController::Filters to compute the values and store those values in instance variables. Refer instance variables in layouts.