title: Django: AJAX and path params
body: <p>I am trying to figure out how to communicate variables a particular js file that makes an AJAX request in Django.</p>
  
  <p>Say we have an url with a path param that maps to a particular view:</p>
  
  <pre><code>url(r'^post/(?P&lt;post_id&gt;\d+)/$', TemplateView.as_view('post.html'))
  </code></pre>
  
  <p>And then the <code>post.html</code> includes a script that performs an AJAX request to fetch the post as JSON:</p>
  
  <pre><code>post.html
  
  &lt;script src="{{ STATIC_URL }}/js/post.js"&gt;&lt;/script&gt;
  &lt;div id="post-container"&gt;&lt;/div&gt;
  </code></pre>
  
  <p>This could be the js file. Let's say we do it this way because the post (as JSON) needs to be used in a js plugin to display it in a particular fancy manner.</p>
  
  <pre><code>post.js
  
  $.ajax({
     url: '/post/??post_id??',
     contentType: 'application/json'
  })
  .done(function(post_data) {
      togglePlugin(post_data);
  });
  </code></pre>
  
  <p>My main concern is how to figure out what <code>post_id</code> is from the js file in order to make the appropriate call.</p>
  
  <p>How are these parts usually connected in Django? The parts I am talking about are urls, path params, views and ajax.</p>