如何使带有翻译的视图的缓存无效？ [英] How can the cache for the views with translations be invalidated?

问题描述

想象一下，您有两个使用如下代码的视图：

Imagine you have two views with code like the following:

controller_a / a.html.erb

  <%= content_tag(:div) do %>
     <%= I18n.t "some.key" %>
  <% end %>

controller_b / b.html.erb

  <%= content_tag(:div) do %>
     <%= I18n.t "some.key" %>
  <% end %>

  <%= content_tag(:div) do %>
     <%= I18n.t "some.other_key" %>
  <% end %>

因此， a.html.erb 是在controller_a＃a上，而 b.html.erb 在controller_b＃b上。这两个动作均由 caches_action 缓存。如何更改 some.key 转换键时，两个视图都无效？我该如何构建通用机制？

So, a.html.erb is on controller_a#a, while b.html.erb is on controller_b#b. Both actions are cached by caches_action. How can I make sure that when I change the some.key translation key, both views are invalidated? How could I build a generic mechanism?

推荐答案

说，在您的 ApplicationController 创建以下类方法（或在lib中，然后扩展 ）：

Say, in your ApplicationController create the following class-method (or in a lib and extend by it):

def self.i18n_digest(*scopes)
    Digest::MD5.hexdigest I18n.t(scopes).to_s
end

然后您可以在 caches_action ：cache_path 选项>这样：

Then you can use :cache_path option in your caches_action this way:

caches_action :some_action, cache_path: { some_key: i18n_digest('some', 'foo') }

只需确保将语言环境设置为 before_filter 在此语句之前。

Just make sure that you set the locale in a before_filter before this statement.

cache_path 上的文档。

Docs on cache_path.

注意：我正在使用翻译范围（'some'）以将其所有嵌套消息作为哈希值获取。

Note: I'm using the scope of translation ('some') to get all its nested messages as a hash.

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