Edit Question - KnowledgeHub

Title Body

Some code and my goal My (simplified) model: class Stop(models.Model): EXPRESS_STOP = 0 LOCAL_STOP = 1 STOP_TYPES = ( (EXPRESS_STOP, 'Express stop'), (LOCAL_STOP, 'Local stop'), ) name = models.CharField(max_length=32) type = models.PositiveSmallIntegerField(choices=STOP_TYPES) price = models.DecimalField(max_digits=5, decimal_places=2, null=True, blank=True) def _get_cost(self): if self.price == 0: return 0 elif self.type == self.EXPRESS_STOP: return self.price / 2 elif self.type == self.LOCAL_STOP: return self.price * 2 else: return self.price cost = property(_get_cost) My Goal : I want to sort by the cost property. I tried two approaches. Using order_by QuerySet API Stops.objects.order_by('cost') That yielded the following template error: Caught FieldError while rendering: Cannot resolve keyword 'cost' into field. Using dictsort template filter {% with deal_items|dictsort:"cost_estimate" as items_sorted_by_price %} Received the following template error: Caught VariableDoesNotExist while rendering: Failed lookup for key [cost] in u'Union Square' So... How should I go about doing this?

Tags (comma-separated) Cancel