fix(warehouse): 采购价必须大于0

- 在更新仓库产品库存时，增加对采购价的校验
- 如果采购价小于等于0，抛出"采购价必须大于0"的异常

app/admin/logic/warehouse_product/WarehouseProductLogic.php

@@ -48,6 +48,9 @@ class WarehouseProductLogic extends BaseLogic
                         if (!$storeProduct) {
                             throw new BusinessException('商品不存在');
                         }
+                        if($storeProduct['purchase']<=0){
+                            throw new BusinessException('采购价必须大于0,'.$params['product_id']);
+                        }
                         $total_price = bcmul($after_nums, $storeProduct['purchase'], 2);
                         WarehouseProductStorege::update(['nums' => $after_nums, 'total_price' => $total_price], ['id' => $storege['id']]);
                     }