Fix(商品/订单):[#1021]商品详情页购买时选择优惠券，点击“立即购买”后已显示扣除优惠金额，但点开提交订单页面的优惠券时，优惠券未勾选

pages/order/OrderSubmission/index.vue

@@ -185,8 +185,18 @@
     </view>
 
     <!-- v9 优惠券开始 -->
-    <u-popup :show="show" :round="10" mode="bottom" closeOnClickOverlay @close="changeCoupons">
-      <CouponsPopup :two-list="couponList" @close="changeCoupons" v-if="couponList.usable"/>
+    <u-popup
+      :show="show"
+      :round="10"
+      mode="bottom"
+      close-on-click-overlay
+      @close="changeCoupons"
+    >
+      <CouponsPopup
+        v-if="couponList.usable.length > 0"
+        :two-list="couponList"
+        @change="changeCoupons"
+      />
     </u-popup>
     <!-- v9 优惠券结束 -->
 
@@ -272,8 +282,11 @@ export default {
       lotteryRecordId:'',
       payPassword: null,
       // v9-2
-      couponList: {},
-      couponId: 0,
+      couponList: {
+        unusable: [],
+        usable: []
+      },
+      couponId: uni.getStorageSync('couponId') || 0,
       couponIndex: -1,
       show: false
     };
@@ -354,35 +367,42 @@ export default {
       });
     },
     getCartInfo() {
-      var that = this;
-      // const cartIds = this.$yroute.query.id;
-      if (!that.cartid && !that.lotteryRecordId) {
+      const _this = this
+      if (!_this.cartid && !_this.lotteryRecordId) {
         uni.showToast({
           title: "参数有误",
           icon: "none",
           duration: 2000
-        });
-        return this.$yrouter.back();
+        })
+        return this.$yrouter.back()
       }
-      postOrderConfirm(that.cartid,that.lotteryRecordId)
-          .then(res => {
-            that.offlinePayStatus = res.data.offline_pay_status;
-            that.orderGroupInfo = res.data;
-            that.deduction = res.data.deduction;
-            that.couponList = res.data.couponList
-            that.addressInfo = res.data.addressInfo || {};
-            that.systemStore = res.data.systemStore || {};
-            that.storeSelfMention = res.data.storeSelfMention;
-            that.couponId = uni.getStorageSync('couponId') || 0
-            that.computedPrice()
+      postOrderConfirm(_this.cartid,_this.lotteryRecordId).then(res => {
+        const { data } = res
+        _this.offlinePayStatus = data.offline_pay_status
+        _this.orderGroupInfo = data
+        _this.deduction = data.deduction
+        _this.couponList = data.couponList
+        if (_this.couponId > 0) {
+          _this.couponList['usable'].map((item, index) => {
+            if (item.id === _this.couponId) {
+              item.checked = true
+              _this.couponIndex = index
+            } else {
+              item.checked = false
+            }
           })
-          .catch(err => {
-            uni.showToast({
-              title: err.msg,
-              icon: "none",
-              duration: 2000
-            });
-          });
+        }
+        _this.addressInfo = data.addressInfo || {}
+        _this.systemStore = data.systemStore || {}
+        _this.storeSelfMention = data.storeSelfMention
+        _this.computedPrice()
+      }).catch(err => {
+        uni.showToast({
+          title: err.msg,
+          icon: "none",
+          duration: 2000
+        })
+      })
     },
     addressTap: function () {
       //改用跳转页面方式