Comment Django Model Object

index.html

{% with total=post.comment_set.all.count %}
<a href="/blog/{{ post.slug }}#comments">{{ total }} Comment{{ total|pluralize }}</a>
{% endwith %}

models.py

class Comment(models.Model):
    post = models.ForeignKey(Post)
    username = models.CharField(max_length=50)
    user_url = models.URLField()
    body = models.TextField()
    posted = models.DateTimeField(auto_now=True)

    def __unicode__(self):
        return 'Post by %(username)s on %(posted)s' %\
        { "username" : self.username, "posted": self.posted }

post.html

<div class="comments">
    <a name="comments" />
    <h3>Comments</h3>
    {% for comment in post.comment_set.all %}
    <div class="comment">
        <div class="body">
            {{ comment.body }}
        </div>
        <div class="author">
            <a href="{{ comment.user_url }}">{{ comment.username }}</a> on {{ comment.posted }}
        </div>
    </div>
    {% endfor %}
</div>

styles.css

div.comment
{
    background-color: #EAEAEA;
    padding: 10px;
    margin-bottom: 15px;
}

syncdb

python manage.py syncdb