title: Django contenttype question
body: <p>I have a issue linking content type. I'm trying to pull a title out from this model</p>
  
  <pre><code>class TankProfile(models.Model):
      user = models.ForeignKey(User)
      title = models.CharField(max_length=100)
      tank_type = models.SmallIntegerField(max_length=1, choices=TANK_TYPE, db_index=True, default=1, verbose_name="Tank Type")
      ts = models.DateTimeField(auto_now=True)
      tsStart = models.DateTimeField(auto_now_add=True)
      tsEnd = models.DateTimeField(null=True, auto_now=False, blank=True)
      pic = models.CharField(max_length=25)
      slug = models.CharField(max_length=100)
  
      def __unicode__(self):
          return str(self.title)
  
      def get_title(self):
          return "%s" % self.title
  </code></pre>
  
  <p>My linking model is as follows that uses contenttype</p>
  
  <pre><code>class Photo(models.Model):
      album = models.ForeignKey(Album)
      user = models.ForeignKey(User)
      content_type = models.ForeignKey(ContentType, related_name="content_type_set_for_%(class)s")
      object_pk = models.IntegerField(_('object ID'))
      server = models.CharField(max_length=20)
      dir = models.CharField(max_length=20)
      image = models.CharField(max_length=20)
      added = models.DateTimeField(auto_now_add=True)
      title = models.CharField(max_length=150)
      about = models.TextField()
  
  
      def get_root_title(self):
  
          c = ContentType.objects.get(id=self.content_type.id).model_class()
          print c.title
  
          return "Photos"
  
      def __unicode__(self):
          return str(self.id)
  </code></pre>
  
  <p>In the template when I call</p>
  
  <p><code>{{ photo.get_root_title }}</code></p>
  
  <p>Nothing shows up.. and nothing gets printed.. what am I doing wrong?</p>