modify

@@ -358,7 +358,7 @@
                 </div>
               </template>
               <el-select
-                v-if="routeMultiple"
+                v-show="routeMultiple == true"
                 ref="routeSelect"
                 class="wid80"
                 v-model="form.route"
@@ -389,7 +389,7 @@
                 </el-option>
               </el-select>
               <el-select
-                v-if="routeMultiple == false"
+                v-show="routeMultiple == false"
                 ref="routeSelect"
                 class="wid80"
                 v-model="form.route"
@@ -1005,7 +1005,7 @@ export default {
             this.form.route = "";
           } else if (item.chineseName.indexOf("Purple") >= 0) {
             this.routeMultiple = true;
-            this.form.route = [];
+            this.$set(this.form, "route", []);
           }
           this.routeError = true;
         }

@@ -258,11 +258,13 @@ export default {
           }
           findFlightRoute(obj).then(res => {
             if (res.code === 200) {
+              if(res.data.length){
                 res.data[0].route.indexOf(';') <= 0 ?
                 this.routeList = res.data :
                 res.data[0].route.split(';').forEach(item => {
                   this.routeList.push({ id: res.data[0].id, route: item })
                 })
+              }
             } else {
               this.msgWarning(res.msg)
             }