The API

After you’ve got your VotableManager added to your model you can start playing around with the API.

class VotableManager([through=None, verbose_name="Votes"])

Parameters:

• verbose_name – The verbose_name for this field.
• through – The through model

up(user)

This adds a vote to an object by the user. IntegrityError will be raised if the user has voted before:

>>> comments.votes.up(user)

down(user)

Removes the vote from an object. No exception is raised if the user doesn’t have voted the object.

count()

The count of all votes for an object.

annotate(queryset=None, user=None)

Add annotation data to the queyset

Aggregation

Django does not support aggregation with GenericRelation currently but you still can use annotate:

>>> Comment.objects.filter(article__id=article_id).annotate(num_votes=Count('votes__user'))

Or you can call the annotate API like so, this will add num_votes and is_voted to each instance:

>>> comments = Comment.objects.filter(article__id=article_id)
>>> Comment.votes.annotate(comments, user=user)