Django更改和跟踪订单状态

from django.db import models

class Order(models.Model):
    STATUS_CHOICES = [
        ('pending', '待支付'),
        ('paid', '已支付'),
        ('processing', '处理中'),
        ('shipped', '已发货'),
        ('delivered', '已送达'),
        ('cancelled', '已取消'),
        ('refunding', '退款中'),
        ('refunded', '已退款'),
    ]
    
    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='pending')
    # 其他字段...

from django.shortcuts import get_object_or_404, redirect
from .models import Order

def change_status(request, order_id, new_status):
    order = get_object_or_404(Order, id=order_id)
    if new_status in dict(Order.STATUS_CHOICES):
        order.status = new_status
        order.save()
    return redirect('order_detail', order_id=order.id)

from django.db.models.signals import post_save
from django.dispatch import receiver
from .models import Order

@receiver(post_save, sender=Order)
def order_status_changed(sender, instance, **kwargs):
    if instance.status == 'paid':
        # 发送支付成功的通知
        pass
    elif instance.status == 'delivered':
        # 发送送达通知
        pass