class Blog(models.Model):
	header = models.CharField(max_length=500,help_text=u'Заголовок новости',verbose_name=u'Заголовок')
	preview = models.TextField(help_text=u'Краткое описание новости',verbose_name=u'Превью')................

class BlogComment(models.Model):
	blog_record = models.ForeignKey('Blog')
	author = models.CharField(max_length=50,verbose_name=u'Автор',)
        ...............

class CommentForm(ModelForm):
	class Meta:
		model = BlogComment
		fields = ['author','header','fulltext']

def detail(request,id):
	item = Blog.objects.get(id=int(id))
	myform = CommentForm(request.POST)

def detail(request, id):
    post = request.method == 'POST'
    data = request.POST
    blog_record = get_object_or_404(Blog, id=id)
    #
    form = CommentForm(data or None)
    #
    if post and form.is_valid():
        comment = form.save(commit=False)
        comment.blog_record = blog_record
        comment.save()
    #
    return render_to_response('qwerty.html', {'form':form})