产品详情页购买输入错误提示（不可拆的情况下点击加报错的问题）

components/store/CommodityInfo.vue

@@ -309,8 +309,13 @@
         getFragment(this.commodity, this.fragment)
       },
       addNum () {
-//        let pack = this.commodity.perQty || this.commodity.minPackQty
-        let newNum = this.fragment.num + 1
+        let pack = this.commodity.perQty || this.commodity.minPackQty
+        let newNum = 0
+        if (this.commodity.breakUp) {
+          newNum = this.fragment.num + 1
+        } else {
+          newNum = this.fragment.num + pack
+        }
         this.changeNum(newNum)
         getFragment(this.commodity, this.fragment)
       },