限制订单换房必须有房间才可提交

src/views/system/order/index.vue

@@ -516,8 +516,8 @@
             </el-form-item>
           </el-col>
           <el-col :span="12">
-            <el-form-item label="所属房间" prop="roomId">
-              <el-select v-model="changeForm.roomId" clearable placeholder="请选择所属房间">
+            <el-form-item label="更换房间" prop="roomId">
+              <el-select v-model="changeForm.roomId" clearable placeholder="请选择更换房间">
                 <el-option
                   v-for="item in changeRoomList"
                   :key="item.id"
@@ -1080,8 +1080,9 @@ export default {
     },
     changeroomList(row) {
       changeRoomList(row.id).then(res => {
-        if (res.code === 500) {
+        if (res.data === null) {
           this.$modal.msgError(res.msg);
+          this.changeOpen = false;
         } else {
           this.changeRoomList = res.data
         }
@@ -1113,6 +1114,10 @@ export default {
       })
     },
     submitChangeRoom() {
+      if (this.changeForm.roomId === '' || this.changeForm.roomId === null) {
+        this.$modal.msgError("更换房间不能为空");
+        return;
+      }
       this.$refs["changeForm"].validate(valid => {
         if (valid) {
           changeRoom(this.changeForm).then(res => {