使用自定义趋势算法而不是模型字段订购模型行

I have the following models

我有以下型号

class Dishes(models.Model):
    name = models.CharField(max_length=40, unique=True)
    date_added = models.DateTimeField(auto_now_add=True)
    #increment/decrement with upvote added or removed
    count_votes = models.IntegerField(blank=True, null=True, default=0)

class Upvotes(models.Model):
    dish = models.ForeignKey(Dishes)
    user = models.ForeignKey(User)
    date_added = models.DateTimeField(auto_now_add=True)
class Di