售前退货，要增加的实际库存要减去所有丢失数量

app/admin/controller/ReorderChild.php

@@ -612,10 +612,14 @@ class ReorderChild extends Base
                         ->findOrEmpty();
                     if (empty($has_good)) throw new Exception('未找到商品上线记录');
                     else {
+                        //要增加的实际库存要减去所有丢失数量
+                        $all_loss_num = Db::name('sale_return_child')
+                            ->where(['is_del' => 0, 'returnCode' => $info['returnCode']])
+                            ->sum('loss_num');
                         Db::name('good')
                             ->data(['updatetime' => $date])
                             ->where('id', $has_good['id'])
-                            ->inc('usable_stock', $thnum)
+                            ->inc('usable_stock', $thnum - $all_loss_num)
                             ->update();
                     }