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app/admin/model/GoodStockInfo.php

@@ -163,8 +163,8 @@ class GoodStockInfo extends Model
 				if(empty($stock)|| $stock['balance_num']< $num)
 					throw new Exception("bn库存数不足",1006);
 				else{
-						$update['balance_num']-=$num;
-						$update['total_num']-=$num;
+						$update['balance_num']=$stock['balance_num']-$num;
+						$update['total_num']=$stock['total_num']-$num;
 						$update['updatetime']=date("Y-m-d H:i:s");
 					}
 			}else{
@@ -180,8 +180,8 @@ class GoodStockInfo extends Model
 						"updatetime"=>date("Y-m-d H:i:s")
 						];
 				}else{
-						$update['balance_num']+=$num;
-						$update['total_num']+=$num;
+						$update['balance_num']=$stock['balance_num']+$num;
+						$update['total_num']=$stock['total_num']+$num;
 						$update['updatetime']=date("Y-m-d H:i:s");
 				}
 			}