设置couponId

src/views/goods-detail.vue

@@ -497,7 +497,7 @@ export default {
     getTotalPrice(currentCoupon) {
       const num = this.curtGoodsNum;
       let couponId = 0;
-      if(currentCoupon) {
+      if(currentCoupon && currentCoupon.couponId) {
         couponId = currentCoupon.couponId;
       }
       this.GET(`trade/goods/getPrice/${this.goodsId}/${num}/${couponId}`, {}).then(res => {