Древовидные комментарии

class Review(models.Model):
    shown_name = models.CharField(max_length=255, verbose_name="Отображаемое название")
    name = models.CharField(max_length=255, verbose_name='Текст для формирования url')
    slug = models.SlugField(verbose_name='url-адрес', unique=True)
 
 
class Comment(models.Model):
    class Meta:
        db_table = "comments"
 
    path = ArrayField(models.IntegerField())
    review = models.ForeignKey(Review)
    author = models.CharField(max_length=30)
    content = models.TextField('Комментарий')
    pub_date = models.DateTimeField('Дата комментария', default=timezone.now)
 
    def __unicode__(self):
        return self.content[0:200]
 
    def get_offset(self):
        level = len(self.path) - 1
        if level > 5:
            level = 5
        return level
 
    def get_col(self):
        level = len(self.path) - 1
        if level > 5:
            level = 5
        return 12 - level

from django import forms
 
from .models import Comment
 
 
class CommentForm(forms.Form):
 
    parent_comment = forms.IntegerField(
        widget=forms.HiddenInput,
        required=False
    )
 
    comment_area = forms.CharField(
        label="",
        widget=forms.Textarea
    )

def get_comment(request, review_slug):
    comment_form = CommentForm
    review = get_object_or_404(Review, id=review_slug)
    context = {}
    context.update(csrf(request))
    # author = review.comment_set.all()[0]
    context['comments'] = review.comment_set.all().order_by('path')
    # context['next'] = review.get_absolute_url()
    context['form'] = comment_form
    return render_to_response(template_name='pages/comment.html', context=context)
 
@require_http_methods(["POST"])
def add_comment(request):
    form = CommentForm(request.POST)
    review = get_object_or_404(Review)
 
    if form.is_valid():
        comment = Comment()
        comment.path = []
        # comment.author = auth.get_user(request)
        comment.content = form.cleaned_data['comment_area']
        comment.save()
 
        try:
            comment.path.extend(Comment.objects.get(id=form.cleaned_data['parent_comment']).path)
            comment.path.append(comment.id)
        except ObjectDoesNotExist:
            comment.path.append(comment.id)
 
        comment.save()
    # return redirect(review.get_absolute_url())