Django - How to sort through a queryset based on the value of an attribute

I have created the following model which stores information for an html5 banner. I have a ForeignKey to associate the banner with a specific project. class BannerCode(models.Model): ROUNDS_LIST = ( ('1', '1'), ('2', '2'), ('3', '3'), ('4', '4'), ('5', '5'), ('6', '6'), ) project = models.ForeignKey(Project) client = models.ForeignKey(Client, null=True, blank=True) name = models.CharField(max_length=256, null=True, blank=True) width = models.CharField(max_length=3, null=True, blank=True) height = models.CharField(max_length=3, null=True, blank=True) review_round = models.CharField(max_length=3, choices=ROUNDS_LIST, default=1) I need to print out in my template something like this desired Output: Round 1 banner name banner name banner name banner name Round 2 banner name banner name banner name banner name I am having trouble understanding how to loop through the objects and sort by the review_round attribute. I created a custom filter and am able to sort them in one long list: @register.filter def sort_by(queryset, order): return queryset.order_by(order) In Template: {% for b in project.bannercode_set.all|sort_by:'review_round' %} {{ b.review_round }} {% endfor %} This loop works great for outputting something like this: Current Output banner name, round 1 banner name, round 1 banner name, round 2 banner name, round 3 How can I create a for loop that would match my desired output?