#90 Fragment Caching (revised)

Feb 18, 2012 | 9 minutes | Performance, Views, Caching

If you need to cache a certain section of a page instead of the entire page, fragment caching is the way to go. Learn how caching is stored, how to create auto expiring caches, and more.

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Episode 89: Page Caching (revised)

          rails console
        
article = Article.first
article.cache_key
article.touch
Rails.cache.read("views/recent_articles")
Rails.cache.class

          config/environments/development.rb
        
config.action_controller.perform_caching = true

          views/show.html.erb
        
<% cache "recent_articles" do %>
<div id="recent_articles">
  <h3>Recent Articles</h3>
  <ul>
  <% @recent_articles.each do |article| %>
    <% cache ["recent", article] do %>
      <li><%= link_to article.name, article %></li>
    <% end %>
  <% end %>
  </ul>
</div>
<% end %>

<% cache @article do %>
...
<% end %>

          articles_controller.rb
        
expire_fragment("recent_articles")

          models/comment.rb
        
belongs_to :article, touch: true