feat: added custom signal for pre sales order created

business/handlers.py

@@ -0,0 +1,34 @@
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+def on_pre_sales_order_created(sender, **kwargs):
+    """Handle PreSalesOrder created domain event.
+
+    For now: log only (no side effects).
+    """
+
+    order = kwargs.get('instance')
+    created_by = kwargs.get('created_by')
+    operator = kwargs.get('operator')
+    items_count = kwargs.get('items_count')
+
+    if order is None:
+        logger.warning('[business.handlers] pre_sales_order_created 缺少 instance，已跳过')
+        return
+
+    created_by_label = getattr(created_by, 'username', None) if created_by else None
+    operator_label = getattr(operator, 'name', None) if operator else None
+
+    logger.info(
+        '[business.handlers] pre_sales_order_created: id=%s human_id=%s merchant_id=%s customer_id=%s '
+        'created_by=%s operator=%s items_count=%s',
+        getattr(order, 'id', None),
+        getattr(order, 'human_id', None),
+        getattr(order, 'merchant_id', None),
+        getattr(order, 'customer_id', None),
+        created_by_label or '-',
+        operator_label or '-',
+        items_count if items_count is not None else '-',
+    )