AngularJS之ng-options的best practise

function MySelectCtrl($scope)
{
  $scope.Model = [
    {
      id: 10002,
      MainCategory: ‘男‘,
      ProductName: ‘水洗T恤‘,
      ProductColor: ‘黑‘
    },
    {
      id: 10004,
      MainCategory: ‘女‘,
      ProductName: ‘V领短袖‘,
      ProductColor: ‘红‘
    },
    {
      id: 10006,
      MainCategory: ‘男‘,
      ProductName: ‘圆领长袖‘,
      ProductColor: ‘白‘
    }];
  
  $scope.selected = 10002;
}

<select ng-model="selected" ng-options="m.id as (m.ProductColor + ‘ - ‘ + m.ProductName) for m in Model">
  <option value="">-- 选择一个试试 --</option>
</select>