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POHow to fragment cache "like" buttons ? (Rails 3.2, memcached)
 

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  1. POHow to fragment cache "like" buttons ? (Rails 3.2, memcached)
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    <p>My Rails app has <code>Post</code> and <code>Member</code> models. Within <code>posts/:id/show</code> contains a "like" button which Members can click, or "Unlike" if <code>@member</code> has already "liked" this <code>@post</code> already. </p> <p>(This button will link to a post action that does some ajax and makes the "like" button change into a "unlike" button)</p> <p>Whats the best practice for caching the button? (below code obviously doesn't cache the button html). </p> <p>Should I add <code>:touch =&gt; true</code> to <code>member.rb</code>, and then make a cache key for the button e.g. <code>&lt;% cache ['V1', @post, @member, 'like_button']</code> ? (seems redundant?)</p> <p><strong>post.rb</strong></p> <pre><code>has_many :likes </code></pre> <p><strong>like.rb</strong></p> <pre><code>belongs_to :member belongs_to :post </code></pre> <p><strong>member.rb</strong></p> <pre><code>has_many :likes </code></pre> <p>*<em>posts/show.html.erb *</em></p> <pre><code>&lt;% cache ['V1', @post, 'show'] do %&gt; &lt;h1&gt;@post.title&lt;/h1&gt; &lt;div class="content"&gt;@post.content&lt;/div&gt; &lt;% end %&gt; &lt;%= render 'like_button', :post=&gt; @post, :member =&gt; @member %&gt; </code></pre> <p>** posts/_like_button.html.erb **</p> <pre><code>&lt;% if member.liked_post?(post) %&gt; &lt;%= link_to unlike_post_path(post), :method =&gt; :post, :remote =&gt; true, :class =&gt; 'btn' %&gt; &lt;% else %&gt; &lt;%= link_to like_post_path(post), :method =&gt; :post, :remote =&gt; true, :class =&gt; 'btn' %&gt; &lt;% end %&gt; </code></pre>
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