Angular.JS中select下拉框设置value的方法

<select id="selectDetectUnit" class="form-control" ng-model="detectUnits" ng-options="detectUnit.name for detectUnit in detectQueryFilters.detectUnits"> 
   <option value="">全部</option> 
</select> 

<option value="" class="">全部</option> 
<option value="0">董浜惠健净菜</option> 
<option value="1">古里绿品公司</option> 
<option value="2">曹家桥物流公司</option> 
<option value="3">董浜农服中心</option> 

<select id="selectDetectUnit" class="form-control" ng-model="filter.detectUnitId" > 
  <option value="">全部</option> 
 <option ng-repeat="detectUnit in detectQueryFilters.detectUnits" value="{{detectUnit.id}}">{{detectUnit.name}}</option> 
</select> 

<option value="">全部</option>        
<!-- ngRepeat: detectUnit in detectQueryFilters.detectUnits --> 
<option ng-repeat="detectUnit in detectQueryFilters.detectUnits" value="160101" class="ng-scope ng-binding">董浜惠健净菜</option> 
<option ng-repeat="detectUnit in detectQueryFilters.detectUnits" value="160102" class="ng-scope ng-binding">古里绿品公司</option> 
<option ng-repeat="detectUnit in detectQueryFilters.detectUnits" value="160103" class="ng-scope ng-binding">曹家桥物流公司</option> 
<option ng-repeat="detectUnit in detectQueryFilters.detectUnits" value="160104" class="ng-scope ng-binding">董浜农服中心</option> 
<option ng-repeat="detectUnit in detectQueryFilters.detectUnits" value="160105" class="ng-scope ng-binding">港南村7组</option> 

alert($scope.filter.detectUnitId);