submitted_at=previous.submitted_at,

                )

            else:

                # self is not the latest review so we just need to decrement

                # the comment count

                self.proposal.result.comment_count = models.F("comment_count") - 1

                self.proposal.result.save()

        # in all cases we need to delete the review; let's do it!

        super(Review, self).delete()

    def css_class(self):

        return {

            self.VOTES.PLUS_ONE: "plus-one",

            self.VOTES.MINUS_ONE: "minus-one",

        }[self.vote]

    @property

    def section(self):

        return self.proposal.kind.section.slug

    class Meta:

        verbose_name = _("review")

        verbose_name_plural = _("reviews")

class LatestVote(models.Model):

    # No way to encode "-0" vs. "+0" into an IntegerField, and I don't feel

    # like some complicated encoding system.

    vote = models.CharField(max_length=2, choices=VOTES.CHOICES, verbose_name=_("Vote"))

    submitted_at = models.DateTimeField(default=datetime.now, editable=False, verbose_name=_("Submitted at"))

    class Meta:

        unique_together = [("proposal", "user")]

        verbose_name = _("latest vote")

        verbose_name_plural = _("latest votes")

    def css_class(self):

        return {

            self.VOTES.PLUS_ONE: "plus-one",

            self.VOTES.MINUS_ONE: "minus-one",

        }[self.vote]

class ProposalResult(models.Model):

    proposal = models.OneToOneField(ProposalBase, related_name="result", verbose_name=_("Proposal"))

    score = models.DecimalField(max_digits=5, decimal_places=2, default=Decimal("0.00"), verbose_name=_("Score"))

    comment_count = models.PositiveIntegerField(default=0, verbose_name=_("Comment count"))

    vote_count = models.PositiveIntegerField(default=0, verbose_name=_("Vote count"))

    plus_two = models.PositiveIntegerField(default=0, verbose_name=_("Plus two"))

    plus_one = models.PositiveIntegerField(default=0, verbose_name=_("Plus one"))

    minus_one = models.PositiveIntegerField(default=0, verbose_name=_("Minus one"))

    minus_two = models.PositiveIntegerField(default=0, verbose_name=_("Minus two"))