Javascript angularjs ng重复级联下拉列表未更新

我在使用Angularjs时遇到了这个问题 我正在创建级联下拉列表，如下所示

            <div class="col-sm-2 pr10">
            <select class="PropertyType" ng-controller="LOV" ng-init="InitLov(140)" ng-model="PropertyType" ng-change="update(PropertyType)" >
                <option value=""  selected="selected" disabled="disabled"> {{type ? type: 'Property Type'}} </option>
                <!-- <option value="">-- Select Type --</option>-->
                <option ng-repeat="Lov in LovList" value="{{Lov.Value}}" >{{Lov['Lable'+Lang]}} </option>
            </select>
        </div>
        <div class="col-sm-2 pr10">
            <select class="PropertySubType" ng-controller="LOV" ng-model="PropertySubType" >
                <option value="" selected="selected"disabled="disabled" >{{subType ? subType: 'Property Sub Type'}}</option>
                <!--  <option value="">-- Select Sub Type --</option> -->
                <option ng-repeat="Sub in SubType" value="{{Sub.Value}}" >{{Sub['Lable'+Lang]}} </option>
            </select>
        </div>

API返回数据，子类型作用域获取数据，但不更改下拉数据（PropertySubType），

---

*该函数位于LOV控制器内部。

不要在每次选择时重复使用

ng controller=“LOV”

，这样它们都会获得不同的作用域。将两个选择置于同一控制器的范围内

也不要使用ngRepeat，请使用ngOptions：

<div ng-controller="LOV">
  <div class="col-sm-2 pr10">
    <select class="PropertyType" 
      ng-init="InitLov(140)" 
      ng-model="PropertyType" 
      ng-change="update(PropertyType)"
      ng-options="Lov.Value as Lov['Lable' + Lang] for Lov in LovList">
      <option value="" selected="selected" disabled="disabled"> {{type || 'Property Type'}} </option>
    </select>
  </div>
  <div class="col-sm-2 pr10">
    <select class="PropertySubType" 
      ng-options="Sub.Value as Sub['Lable' + Lang] for Sub in SubType"
      ng-model="PropertySubType">
      <option value="" selected="selected" disabled="disabled">{{subType || 'Property Sub Type'}}</option>
    </select>
  </div>
</div>

{{type | |'属性类型'}}
{{子类型| |'属性子类型'}

非常感谢，非常有效，感谢您的帮助，先生！没问题，很乐意帮忙！

<div ng-controller="LOV">
  <div class="col-sm-2 pr10">
    <select class="PropertyType" 
      ng-init="InitLov(140)" 
      ng-model="PropertyType" 
      ng-change="update(PropertyType)"
      ng-options="Lov.Value as Lov['Lable' + Lang] for Lov in LovList">
      <option value="" selected="selected" disabled="disabled"> {{type || 'Property Type'}} </option>
    </select>
  </div>
  <div class="col-sm-2 pr10">
    <select class="PropertySubType" 
      ng-options="Sub.Value as Sub['Lable' + Lang] for Sub in SubType"
      ng-model="PropertySubType">
      <option value="" selected="selected" disabled="disabled">{{subType || 'Property Sub Type'}}</option>
    </select>
  </div>
</div>