Merge branch 'couponV2.0' of https://codeup.aliyun.com/5f9118049cffa29cfdd3be1c/marketing/frontend into couponV2.0

src/pages/exchangecode/exchangecodeAdd/index.jsx

@@ -905,8 +905,20 @@ export default class exchangeAdd extends React.Component {
             item.type = 1
             item.only = item.product_id
             item.upstream = "直连天下"
-            item.stock = item.stock ? item.stock : item.quantity
-            item.usage = item.usage ? item.usage : 0
+
+            /* 赋值 剩余数量  已使用数量*/
+            /* 新增\复制 */
+            if ([0, 1].includes(this.state.isState)) {
+              item.stock = item.quantity
+              item.usage = 0
+            }
+
+            /* 编辑 */
+            if (this.state.isState === 2) {
+              item.stock = parseInt(item.quantity - item.usage)
+              item.usage = item.usage
+            }
+
             return item
           })
         } else {