fix: sales order retrieve, human_id for sales_order

business/models.py

@@ -255,7 +255,19 @@ class SalesOrder(OrderItemsAggregationMixin, OrderDirectionMixin, OrderCounterpa
     remarks = models.TextField(blank=True, null=True, verbose_name='备注')
 
     def __str__(self):
-        return f'销售订单 {self.id} - {self.customer.name}'
+        order_id = self.human_id or str(self.id)
+        return f'销售订单 {order_id} - {self.customer.name}'
+
+    @property
+    def human_id(self) -> str:
+        """
+        人类可读编号（虚拟编号，不落库）。
+
+        规则与 printing.PrintingOrder.human_id 保持一致：YYYYMMDD{6位id}
+        """
+        if self.id is None or self.created_at is None:
+            return ""
+        return f"{self.created_at.year}{self.created_at.month:02d}{self.created_at.day:02d}{self.id:06d}"
 
     class Meta:
         verbose_name = '销售单'