title: Ember.js has_many not being loaded on deep nested routes
body: <p>Given my current router:</p>
  
  <ol>
  <li>Posts
  
  <ul>
  <li><em>Create</em></li>
  </ul></li>
  <li>Post
  
  <ul>
  <li><em>Edit</em></li>
  <li>Comments
  
  <ol>
  <li><em>Create</em></li>
  </ol></li>
  <li>Comment
  
  <ol>
  <li>InnerComments
  
  <ul>
  <li><em>Create</em></li>
  </ul></li>
  <li>InnerComment
  
  <ul>
  <li><strong>Index</strong> (post.comment.innerComment.index)</li>
  </ul></li>
  </ol></li>
  </ul></li>
  </ol>
  
  <p>Ember.js is not loading any existing innerComments from the backend, but it is doing a hell of a job in creating and saving them like the picture below:
  <a href="https://i.stack.imgur.com/m0d6o.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/m0d6o.png" alt="enter image description here"></a></p>
  
  <p>Not only I am able to create the inner comments, I am also able to successfully edit them as long as I do not reload the page... This unique behaviour tells me that the issue seems to be rather specific, but I just cannot find it. The code snippets below summarizes how things are loaded in order, but you can also check out the <a href="https://github.com/Deovandski/fakktion" rel="nofollow noreferrer">Source Code</a> and these two screenshots with Ember Inspector:</p>
  
  <p><a href="https://i.imgur.com/S8Z5cY6.png" rel="nofollow noreferrer">Screenshot 1</a> - Created Inner Comment</p>
  
  <p><a href="https://i.imgur.com/giS3oEp.png" rel="nofollow noreferrer">Screenshot 2</a> - Page Refresh.</p>
  
  <p><strong>Post.Index</strong> (model is a post)</p>
  
  <pre><code>{{render "post.comments.index" model}}
  </code></pre>
  
  <p><strong>Post.Comments.Index</strong> (model is a post)</p>
  
  <pre><code>&lt;ol&gt;
      {{#each model.comments as |comment|}}
          &lt;li&gt;{{render "post.comment.index" comment}}&lt;/li&gt;
      {{/each}}
  &lt;/ol&gt;
  </code></pre>
  
  <p><strong>Post.Comment.Index</strong> (model is a comment)</p>
  
  <pre><code> &lt;!--Comment Text, Comment by x User, edit, etc--&gt;
  {{render "post.comment.innerComments.index" model}}
  </code></pre>
  
  <p><strong>Post.Comment.InnerComments.Index</strong> (model is a comment)</p>
  
  <pre><code>&lt;ol&gt;
      {{#each model.inner_comments as |comment|}}
          &lt;li&gt;{{render "post.comment.innerComment.index" comment}}&lt;/li&gt;
      {{/each}}
  &lt;/ol&gt;
  </code></pre>
  
  <p><strong>Post.Comment.InnerComments.Index</strong> (model is an innerComment)</p>
  
  <pre><code> &lt;!--InnerComment Text, InnerComment by x User, edit, etc--&gt;
  {{model.text}}
  </code></pre>