我试图执行在Django保存模型基本日期计算,请参见下面的代码:Django的自定义保存模型
class Purchase(models.Model):
purchase_date = models.DateField()
purchase_place = models.CharField(verbose_name='Place of Purchase', max_length=255)
purchaseCategory = models.ForeignKey(PurchaseCategory, verbose_name='Purchase Category')
cost = models.DecimalField(max_digits=11, decimal_places=2)
warranty_period_number = models.IntegerField()
warranty_period_type = models.CharField(max_length=255, choices=(('m', 'Month(s)'), ('y', 'Year(s)')))
warranty_end_date = models.DateField(editable=False)
scan = models.CharField(max_length=255)
alerts = models.BooleanField(verbose_name='Receive Email Alerts?')
user = models.ForeignKey('auth.User', editable=False)
created = models.DateTimeField(editable=False, auto_now_add=True)
modified = models.DateTimeField(editable=False, auto_now=True)
#custom save model
def save(self, *args, **kwargs):
#figure out warranty end date
if self.warranty_period_type == 'm':
self.warranty_end_date = self.purchase_date + self.purchase_date.timedelta(months=self.warranty_period_number)
else:
self.warranty_end_date = self.purchase_date + self.purchase_date.timedelta(years=self.warranty_period_number)
super(Purchase, self).save()
我想下面的工作,但没有运气..它的错误:
'datetime.date' object has no attribute 'timedelta'
任何人都可以指向正确的方向做我想做的事吗?
干杯, 本
从日期时间进口timedelta – 2014-04-24 07:24:46