mongoDB 多重数组查询(AngularJS绑定显示 nodejs)

var Lesson = Schema({ 
  lessonName: String, 
  intr: String, 
  creTime: Date, 
  sort: String, //分类 
  imgUrl: String, //封面地址 
  price: Number, 
  teacher: String,//教师 
  subTitle:[{ 
    lNo: Number, 
    subLName: String, 
    src: String, 
    filtered: {type: Boolean, default: false} 
    }] 
}); 

<ul > 
  <li ng-repeat="title in lessonInfo.subTitle" ng-hide="{{!title.filtered}}"><a ng-href="showVideo?lessonName={{lessonInfo.lessonName}}&lessonNo={{title.lNo}}&lesId={{lesId}}&subLName={{title.subLName}}" rel="external nofollow" >课时{{title.lNo}}:{{title.subLName}}</a> </li> 
</ul>