Fetching information from nested JSON based on unique fields using AngularJS

Question

I have a json as following.

{  
   "id":14,
   "discussion":8,
   "parent":0,
   "userid":2,
   "subject":"communication skill discussion 2",
   "message":"<p>hi all to communication discussion 2 </p>",
   "children":[  
      24,
      16,
      15
   ]
},
{  
   "id":15,
   "discussion":8,
   "parent":14,
   "userid":2,
   "subject":"Re: communication skill discussion 2",
   "message":"<p>hiiiiiiiiii</p>",
   "children":[  
      25,
      23
   ],
},
{  
   "id":23,
   "discussion":8,
   "parent":15,
   "userid":2,
   "created":1461562317,
   "modified":1461562317,
   "mailed":0,
   "subject":"Re: communication skill discussion 2",
   "message":"<p>helloooo</p>",
   "children":[  

   ],
}

I want first fetch the details whose Ids matches with the elments in children array such as for id:14 there are 3 children 24,16,15.Then the control should go directly to id:15 and fetch details of id:15.Again id has children eg. consider id:23 which has no children and will directly print the message.

Please guide me how will I achieve this using ng-repeat of angular ?

Answer 1

Refer to the demo.

Please find the code below:

HTML:

<div ng-app="app" ng-controller="test">
  <div ng-repeat="(key,value) in data">
    {{key + 1}}) --
    <span ng-if="value.children.length > 0">
    {{value.children}}
    </span>
    <span ng-if="!(value.children.length > 0)">
    No children found!!
    </span>
  </div>
</div>

JS:

var app = angular.module('app', []);

app.controller('test', function($scope) {
  $scope.data = [{
    "id": 14,
    "discussion": 8,
    "parent": 0,
    "userid": 2,
    "subject": "communication skill discussion 2",
    "message": "<p>hi all to communication discussion 2 </p>",
    "children": [
      24,
      16,
      15
    ]
  }, {
    "id": 15,
    "discussion": 8,
    "parent": 14,
    "userid": 2,
    "subject": "Re: communication skill discussion 2",
    "message": "<p>hiiiiiiiiii</p>",
    "children": [
      25,
      23
    ],
  }, {
    "id": 23,
    "discussion": 8,
    "parent": 15,
    "userid": 2,
    "created": 1461562317,
    "modified": 1461562317,
    "mailed": 0,
    "subject": "Re: communication skill discussion 2",
    "message": "<p>helloooo</p>",
    "children": [

    ],
  }];
});

UPDATE: As per the request

Demo

HTML:

<div ng-app="app" ng-controller="test">
  <div ng-repeat="(key,value) in data">
    [{{key + 1}}] --
    <div ng-if="value.children.length > 0">
      <div ng-repeat="item in value.children">
        <span>{{item}}</span> <span class="green" ng-bind-html="getMessage(item)"></span>
      </div>

    </div>
    <span ng-if="!(value.children.length > 0)">
    No children found!!
    </span>
    <br />
  </div>
</div>

JS:

  $scope.getMessage = function(itemId) {
    var flag = true;
    var msg;
    angular.forEach($scope.data, function(value, key) {
      if (flag && value.id == itemId) {
        flag = false;
        msg = value.message;
      } 
    });
    return $sce.trustAsHtml(msg);
  }

CSS:

.green {
  color: green;
}