问Django查询集过滤器并获取最后一项和第一项

EN

first_order = Order.objects.filter(user_id=request.user).first()
last_order = Order.objects.filter(user_id=request.user).last()

class Order(models.Model):
    class Meta:
        ordering = ('-order_date1',)

 
    STATUS = (
        ('Return', 'Return'),
        ('Out for delivery', 'Out for delivery'),
        ('Delivered', 'Delivered'),
        ('new order', 'new order'),
        ('hold', 'hold'),

        )


    order_id= models.CharField(max_length=120, blank= True)
    user = models.ForeignKey(User,on_delete=models.CASCADE, null=True, blank=True)
    date_created = models.DateTimeField(auto_now_add=True, null=True)
    status = models.CharField(max_length=200, null=True , choices=STATUS, default='new order',blank=True)
    note = models.CharField(max_length=1000, null=True,blank=True)
    receiver_name= models.CharField(max_length=100)
    receiver_address= models.CharField(max_length=200)
    receiver_phone = models.CharField(max_length=50)
    order_number = models.CharField(max_length=50)
    condition= models.IntegerField(blank=True,default=0,null=True)
    order_date1 = models.DateField(auto_now_add=True,null=True)
    delivery_cost = models.IntegerField(default=60,null=True,blank=True)
    def __str__(self):
        return self.user.username