This helper exposes a method for caching fragments of a view rather than an entire action or page. This technique is useful caching pieces like menus, lists of newstopics, static HTML fragments, and so on. This method takes a block that contains the content you wish to cache.
See ActionController::Caching::Fragments for usage instructions.
If you want to cache a navigation menu, you can do following:
<% cache do %> <%= render :partial => "menu" %> <% end %>
You can also cache static content:
<% cache do %> <p>Hello users! Welcome to our website!</p> <% end %>
Static content with embedded ruby content can be cached as well:
<% cache do %> Topics: <%= render :partial => "topics", :collection => @topic_list %> <i>Topics listed alphabetically</i> <% end %>
# File lib/action_view/helpers/cache_helper.rb, line 34 def cache(name = {}, options = nil, &block) if controller.perform_caching safe_concat(fragment_for(name, options, &block)) else yield end nil end
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