选中一个选项复选框

Question

我有一个非常基本的例子。基于JSON，我需要在select上选择正确的值，然后选中/不选中复选框。

我正在使用ng-model，但无法正常工作。你能帮我吗？

var vm = this;


vm.ticket = {"FUTURE_CALL":1,"TICKET_PRIORITY_DESCRIPTION":"Normal"}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>


<select id="priority-select" uib-tooltip="Select a Priority" ng-model="vm.ticket.TICKET_PRIORITY_CODE" required="" class="ng-pristine ng-invalid ng-invalid-required ng-touched" style="">
  <option value="" disabled="">--- Please select a priority ---</option>
  <!-- not selected / blank option -->
  <!-- ngRepeat: priority in vm.priorities -->
  <option ng-repeat="priority in vm.priorities" value="L" class="ng-binding ng-scope" style="">
    Low
  </option>
  <!-- end ngRepeat: priority in vm.priorities -->
  <option ng-repeat="priority in vm.priorities" value="N" class="ng-binding ng-scope">
    Normal
  </option>
  <!-- end ngRepeat: priority in vm.priorities -->
  <option ng-repeat="priority in vm.priorities" value="H" class="ng-binding ng-scope">
    High
  </option>
  <!-- end ngRepeat: priority in vm.priorities -->
  <option ng-repeat="priority in vm.priorities" value="U" class="ng-binding ng-scope">
    Unknown
  </option>
  <!-- end ngRepeat: priority in vm.priorities -->
</select>


<input type="checkbox" ng-model="vm.ticket.FUTURE_CALL" />