sms

backend/shop/signals.py

@@ -0,0 +1,54 @@
+from django.db.models.signals import pre_save, post_save
+from django.dispatch import receiver
+from .models import Order
+from .sms_utils import notify_admins_order_paid, notify_user_order_paid, notify_user_order_shipped
+
+@receiver(pre_save, sender=Order)
+def track_order_changes(sender, instance, **kwargs):
+    """
+    在保存之前检查状态变化
+    """
+    if instance.pk:
+        try:
+            old_instance = Order.objects.get(pk=instance.pk)
+            
+            # 检查是否从非支付状态变为支付状态
+            if old_instance.status != 'paid' and instance.status == 'paid':
+                instance._was_paid = True
+            
+            # 检查是否发货 (状态变为 shipped 且有单号)
+            # 或者已经是 shipped 状态但刚填入单号
+            if instance.status == 'shipped' and instance.tracking_number:
+                if old_instance.status != 'shipped' or not old_instance.tracking_number:
+                    instance._was_shipped = True
+                    
+        except Order.DoesNotExist:
+            pass
+
+@receiver(post_save, sender=Order)
+def send_order_notifications(sender, instance, created, **kwargs):
+    """
+    在保存之后发送通知
+    """
+    if created:
+        return
+
+    # 1. 处理支付成功通知
+    if getattr(instance, '_was_paid', False):
+        try:
+            print(f"订单 {instance.id} 支付成功，触发短信通知流程...")
+            notify_admins_order_paid(instance)
+            notify_user_order_paid(instance)
+            # 清除标记防止重复发送 (虽然实例通常是新的，但保险起见)
+            instance._was_paid = False
+        except Exception as e:
+            print(f"发送支付成功短信失败: {str(e)}")
+
+    # 2. 处理发货通知
+    if getattr(instance, '_was_shipped', False):
+        try:
+            print(f"订单 {instance.id} 已发货，触发短信通知流程...")
+            notify_user_order_shipped(instance)
+            instance._was_shipped = False
+        except Exception as e:
+            print(f"发送发货短信失败: {str(e)}")