mongoDB multiple array query of AngularJS binding displays nodejs

Core code:

js code

var Lesson = Schema({ 
  lessonName: String, 
  intr: String, 
  creTime: Date, 
  sort: String, // classification  
  imgUrl: String, // Cover the address  
  price: Number, 
  teacher: String,// Teachers'  
  subTitle:[{ 
    lNo: Number, 
    subLName: String, 
    src: String, 
    filtered: {type: Boolean, default: false} 
    }] 
}); 

My HTML code

<ul class="menu fl"> 
  <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" > class {{title.lNo}}:{{title.subLName}}</a> </li> 
</ul>

lessonInfo receives an array of data passed in the background for AngularJS