title: Django: I have extended group model, how to make queries to get field value?
body: <p>I have extended the group model as the following:</p>
  
  <pre><code>class MyGroup(ProfileGroup):
      mobile = models.CharField(max_length = 15)
      email = models.CharField(max_length = 15)
      c_annotates = models.ManyToManyField(Annotation, verbose_name=_('annotation'), blank=True, null=True)
      c_locations = models.ManyToManyField(Location, verbose_name=_('locations'), blank=True, null=True)
      date_begin = models.DateField(verbose_name=_('date begin'), auto_now=False, auto_now_add=False)
      date_end = models.DateField(verbose_name=_('date end'), auto_now=False, auto_now_add=False)
  </code></pre>
  
  <p>Now the group in database has new attributes like date_begin and date_end. Now I am wondering how can I get the value of date_begin and date_end in the views.py from the corresponding entry of the database? Thanks.</p>