      comment = models.TextField()
      rating = models.IntegerField(blank=True, null=True, choices=RATING_CHOICES, help_text='How did you rate this post?')
      created = models.DateTimeField(auto_now_add=True)
  
      class Meta:
          ordering = ('created',)
  
      @models.permalink
      def get_absolute_url(self):
          return ('comment', (), {'blogpost': self.blogpost.key, 'id': self.id})
      
      @property
      @models.permalink
      def blogpost_url(self):
          """Link to the blog post resource which this comment corresponds to."""
          return ('blog-post', (), {'key': self.blogpost.key})
          
 
</s> remove     class Meta:
        ordering = ('created',)

    @models.permalink
    def get_absolute_url(self):
        return ('blog-post', (), {'key': self.key})

    @property
    @models.permalink
    def comments_url(self):
        """Link to a resource which lists all comments for this blog post."""
        return ('comments', (), {'blogpost': self.key})

    def __unicode__(self):
        return self.title

 </s> add  </s> remove     
    class Meta:
        ordering = ('created',)
 </s> add  </s> remove         """For the purposes of the sandbox, limit the maximum number of stored models."""
 </s> add         """
        For the purposes of the sandbox limit the maximum number of stored models.
        """ </s> remove             MyModel.objects.all()[0].delete()
    
    @models.permalink
    def get_absolute_url(self):
        return ('my-model-resource', (self.pk,))
 </s> add             MyModel.objects.all().order_by('-created')[0].delete()
 </s> remove class AnotherExampleResource(Resource):
    """A basic GET-able/POST-able resource."""
    form = MyForm # Optional form validation on input (Applies in this case the POST method, but can also apply to PUT)
 </s> add class AnotherExampleResource(BaseView):
    """
    A basic GET-able/POST-able resource.
    """
    resource = MyFormValidation
      comment = models.TextField()
      rating = models.IntegerField(blank=True, null=True, choices=RATING_CHOICES, help_text='How did you rate this post?')
      created = models.DateTimeField(auto_now_add=True)
  













keep keep keep keep replace replace replace replace replace replace replace replace replace replace replace replace replace
 Fixing some of the last blocking issues 
examples/blogpost/models.py