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backend/shop/views.py

@@ -601,7 +601,15 @@ class OrderViewSet(viewsets.ModelViewSet):
         创建订单时自动关联当前微信用户
         """
         user = get_current_wechat_user(self.request)
-        serializer.save(wechat_user=user)
+        instance = serializer.save(wechat_user=user)
+
+        # Check if free course and set to paid
+        if instance.course and instance.course.price == 0 and instance.status == 'pending':
+            instance.status = 'paid'
+            instance.save()
+            # Trigger post payment logic
+            from .services import handle_post_payment
+            handle_post_payment(instance)
 
     @action(detail=True, methods=['post'])
     def prepay_miniprogram(self, request, pk=None):