Django threaded comments with up/down-voting (like Hacker News or Reddit) -

i'm new django. i'm trying build discussion app in django that, reddit , hacker news, threaded , sorts each comment up/down vote.

i've been using django-voting app, , continue using if @ possible.

a simplified version of models.py is:

class comment(models.model):     text = models.textfield()     user = models.foreignkey(user)     parent = models.foreignkey('self', related_name='children', null=true, blank=true) 

because using django-voting app, can "score" (upvotes minus downvotes) particular comment so:

comment = comment.objects.get(pk=1) # grab comment primary key = 1 score = vote.objects.get_score(comment)["score"] 

what can't figure out how to: (a) prepare data in view in format turned threaded discussion in template, , (b) how in way sorted upvotes.

any on 2 issues appreciated.

i open using method, mptt, build comment tree -- still not clear how able sort upvote within django-mptt app.

thanks!

edit: have come own, extremely hack-ish solution below. i'm not going mark question answered, because don't think sort of solution 1 use in production (and hope not use in production myself). but, in case looking a solution, hope helpful:

in views.py, created function outputs sorted list vote given queryset of objects:

def list_sorted_by_score(query_set):     sorted_score_list = []      # first, create list of objects associated scores     object in query_set:         # django-voting's get_score outputs dictionary looks like:         # {"score": score, "num_votes": num_votes}         score_dict = vote.objects.get_score(object)         sorted_score_list.append({"object": object, "score": score_dict["score"], "num_votes": score_dict["num_votes"]})      # then, sort list of dictionaries "score"      sorted_score_list.sort(key=lambda x:x["score"], reverse=true) # sorts score, highest lowest (reverse=false lowest highest)     return sorted_score_list 

i use function sort top-level comments score. context variable includes comments, sorted score, there no parents -- i.e.:

top_level_comments = list_sorted_by_score(comment.objects.filter(parent=none)) 

in models.py, defined method gets list_sorted_by_score of children of given comment:

def score_list_children(self):     children = self.children.all()     sorted_score_list = []     object in children:         score_dict = vote.objects.get_score(object)         sorted_score_list.append({"object": object, "score": score_dict["score"], "num_votes": score_dict["num_votes"]})     sorted_score_list.sort(key=lambda x:x["score"], reverse=true)     return sorted_score_list 

finally, made template single comment, "comment.html." simplified version of looks like:

<div class="comment">     {{ comment.object.text }}      {# note must use comment**.object**, since      that's how constructed list_sorted_by_score list of dictionaries  #}     {% child in comment.object.score_list_children %}          {% filename="comment.html" %} {# hack around django throwing maximum recusion error #}          {% include filename comment=child %}          {% endwith %}     {% endfor %}  </div> 

as may evident, quite hack-ish. still interested in hearing real solutions people have tried in real world.