title: django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet. file init
body: <blockquote>
    <p>django.core.exceptions.AppRegistryNotReady: Apps aren't loaded yet.</p>
  </blockquote>
  
  <p>Exception appeared when I added:</p>
  
  <ol>
  <li><p><code>import signals</code> 
  in <em>init</em>.py file <em>(apps/application/init.py)</em></p></li>
  <li><p><code>from models import Review</code>
  in signals.py file <em>(apps/application/signals.py)</em></p></li>
  </ol>
  
  <p>I want to send an http request when there is an insert in the model Review. </p>
  
  <p>So I need to import Review model (in the <code>__init.py__</code> file) to execute the following code:</p>
  
  <pre><code>@receiver (pre_save, sender = Review)
  def my_handler (sender, ** kwargs):
         ....
  </code></pre>