我正在尝试使用django计算利息。在我的模型中:
class Account(models.Model): principal = models.DecimalField("pricipal", max_digits=15, decimal_placesmax_digits=5, decimal_places=5) months = models.IntegerField("number of months", default=0)我的目标是计算每
是否有更改.extra方法创建的字段的选项?self.x = MyModel.objects.extra( "year": "date_trunc('year', created)", ) i.year = datetime.datetime(1999,1,1,1,1)#I changed this field
# but