售后，凭证数据bug修复

src/views/system/retreat/edit.vue

@@ -93,7 +93,7 @@
         <div class="card-header-title">
           <span class="blue-block blue-block-goods-title"></span>买家退货凭证
         </div>
-        <el-table :data="returnInfoTableData">
+        <el-table :data="returnInfoTableData" :key="1">
           <el-table-column label="物流单号" align="center" prop="express_sn"></el-table-column>
           <el-table-column label="物流公司" align="center" prop="express_company_name"></el-table-column>
           <el-table-column label="物流凭证" align="center">
@@ -122,7 +122,7 @@
         <div class="card-header-title">
           <span class="blue-block blue-block-goods-title"></span>历史售后申请
         </div>
-        <el-table :data="asApplyList">
+        <el-table :data="asApplyList" :key="2">
           <el-table-column label="申请时间" align="center" prop="created_time">
             <template slot-scope="scope">
               {{formatter(scope.row.created_time)}}
@@ -487,11 +487,6 @@
               }
               // 退货退款
               if(this.asOrderDetail.refund_type == 2) {
-                // 退款凭证 list 数据
-                this.returnInfoTableData = [];
-                if(this.asOrderDetail.return_inof && this.asOrderDetail.return_inof.length > 0) {
-                  this.returnInfoTableData = this.asOrderDetail.return_inof
-                }
                 this.returnRefundStatus(this.asOrderDetail.status,this.asOrderDetail.close_reason);
                 this.$forceUpdate()
               }
@@ -502,6 +497,17 @@
               // 商品金额 单位
               this.goodsOrderDetail.goods_price = res.data.order_goods.goods_price / 100
             }
+
+            // 退款凭证 list 数据
+            this.returnInfoTableData = [];
+            if(res.data.order_refund.return_info && res.data.order_refund.return_info.express_code) {
+              // this.returnInfoTableData.push(res.data.order_refund.return_info)
+              // console.log(494,this.returnInfoTableData);
+              this.$set(this.returnInfoTableData,this.returnInfoTableData.length,res.data.order_refund.return_info);
+            }else {
+              this.returnInfoTableData = [];
+            }
+
             // 售后历史
             if(res.data.order_refund_history) {
               this.asApplyList = res.data.order_refund_history