title: Model field not found in ContentType model
body: <p>In my local pc, there is a file located at <strong>usr/local/lib/python2.7/dist-package/django/contrib/contenttypes/models.py</strong> which contains model named 'ContentType'. This model contains three fields: </p>
  
  <pre><code>class ContentType(models.Model):
      app_label = models.CharField(max_length=100)
      model = models.CharField(_('python model class name'), max_length=100)
      objects = ContentTypeManager()
  </code></pre>
  
  <p>Again there is another file located at <strong>usr/local/lib/python2.7/dist-package/django/contrib/contenttypes/models.py</strong> which contains model named 'ContentType'. This model contains four fields: </p>
  
  <pre><code>class ContentType(models.Model):
  name = models.CharField(max_length=100)
  app_label = models.CharField(max_length=100)
  model = models.CharField(_('python model class name'), max_length=100)
  objects = ContentTypeManager()
  </code></pre>
  
  <p>I am using django==1.8.7 version
  In my project I am getting the 'ContentType' model with 3 fields(first one) where as I need to get access to 'ContentType' model with 4 fields(second one).</p>
  
  <p>Can you explain me why I am facing this and please give me a solution.</p>