title: Extending Ember JSONAPIAdapter findAll for fetching json from custom url
body: <p>I'm relatively new to Ember.js and I'm trying to studing how ember works and I've this problem:
  from an Ember.js route I will call my django api like this: <code>this.store.findAll('MYMODEL', 'ANOTHER_MODEL_ID')</code></p>
  
  <p>This findAll will produce an api call like /mymodel/<em>another_model_id</em>/ where <em>another_model_id</em> is a dynamic id (uuid like string).</p>
  
  <p>I've tried to override the findAll method with a custom adapter (mymodel adapter) that extends the ApplicationAdapter (JSONAPIAdapter with a custom buildUrl for adding trailing slash). But my attempt failed, because in findAll overridden method I can't reach the <em>ANOTHER_MODEL_ID</em> parameter. I've also tried to override urlForFindAll and buildUrl methods with the same results.</p>
  
  <p>What is the best method for doing this kind of things and how can I do?</p>