Here's my Model:

class User(models.Model):
    pass

class Item(models.Model):
    pass

class ItemVote(models.Model):
    user = models.ForeignKey(User)
    item = models.ForeignKey(Item)
    vote = models.BooleanField()

I want to retrieve a list of Items, and I want to know if the current user has voted for each Item. How do I alter my query object so that it will generate sql similar to:

SELECT ...
FROM items
LEFT OUTER JOIN item_votes ON (item_votes.user_id = ? AND
                               item_votes.item_id = items.id)