更改 收货实重（kg) 字段取值

bms-back/sql/20261012_add_ar_bill_detail_weight_from_order.sql

@@ -0,0 +1,21 @@
+-- 应收账单订单明细冗余 prc_order_bill.weight，供账单导出使用。
+-- 来源字段为空时快照保留 NULL，不伪造为 0。
+
+SET @column_exists := (
+  SELECT COUNT(1) FROM information_schema.COLUMNS
+  WHERE TABLE_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'ar_bill_detail'
+    AND COLUMN_NAME = 'weight'
+);
+SET @sql := IF(@column_exists = 0,
+  'ALTER TABLE `ar_bill_detail` ADD COLUMN `weight` decimal(10,3) DEFAULT NULL COMMENT ''prc_order_bill.weight来源快照'' AFTER `actual_weight`',
+  'SELECT 1'
+);
+PREPARE stmt FROM @sql;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;
+
+UPDATE `ar_bill_detail` d
+INNER JOIN `prc_order_bill` p ON p.`bill_id` = d.`prc_order_bill_id`
+SET d.`weight` = p.`weight`
+WHERE d.`weight` IS NULL AND p.`weight` IS NOT NULL;

bms-back/sql/bms_init.sql

@@ -116,6 +116,7 @@ CREATE TABLE `ar_bill_detail` (
   `country_name` varchar(50) COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT '目的国家名称',
   `dest_postcode` varchar(20) COLLATE utf8mb4_unicode_ci DEFAULT NULL COMMENT '目的邮编',
   `actual_weight` decimal(12,3) DEFAULT NULL COMMENT '实际重量KG',
+  `weight` decimal(10,3) DEFAULT NULL COMMENT 'prc_order_bill.weight来源快照',
   `volume_weight` decimal(12,3) DEFAULT NULL COMMENT '材积重量KG',
   `charge_weight` decimal(12,3) DEFAULT NULL COMMENT '计费重量KG',
   `freight_rate` decimal(10,4) DEFAULT NULL COMMENT '运费单价快照',