# Here's some models class Order(models.Model): shipping_method = models.CharField(max_length=20) class Delivery(models.Model): order = models.ForeignKey('Order', null=True, blank=True) # If this is NULL, then the shipping method is as billed, in order.shipping_method # If this is not NULL, then this is the shipping method that was actually used. shipping_method_override = models.CharField(max_length=20, null=True) def get_method_name(self): if self.shipping_method_override: return self.shipping_method_override else: return self.order.shipping_method # Now let's say this is in a view # How do I get a list of deliveries sorted by the actual method used? deliveries_sorted_by_actual_method = Delivery.objects.order_by(?)
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