Angular ng-repeat with nested json objects?

Question

I have a JSON object, represented as such:

 {
  "orders" : [
    {
      "ordernum" : "PRAAA000000177800601",
      "buyer" : "Donna Heywood"
      "parcels" : [
        {
          "upid" : "UPID567890123456",
          "tpid" : "TPID789456789485"
        },
        {
          "upid" : "UPID586905486090",
          "tpid" : "TPID343454645455"          
        }
      ]
    },
    {
      "ordernum" : "ORAAA000000367567345",
      "buyer" : "Melanie Daniels"
      "parcels" : [
        {
          "upid" : "UPID456547347776",
          "tpid" : "TPID645896579688"
        },
        {
          "upid" : "UPID768577673366",
          "tpid" : "TPID784574333345"
        }
      ]
    }
  ]
}

I need to do a repeater on the second level of this, a list of the "upid" numbers.

I know already how to get the top level

<li ng-repeat="o in orders">{{o.ordernum}}</li>

But I am unclear on the sequence to loop a level down. For example, this is wrong:

<li ng-repeat="p in orders.parcels">{{p.upid}}</li>

I also know how to nest repeaters to get this, but in this case i don't need to display the top level at all.

CLARIFICATION

The goal here is to have one list with the 4 "upid" numbers (there are 2 for each parcel, and there are 2 parcels in the order).

Answer 1

Actually its same answer of @sylwester. The better way to put it in filter. And you can reuse it by passing propertyName parameter.

In your case we passed parcels

JS

myApp.filter('createarray', function () {
    return function (value, propertyName) {
        var arrayList = [];
        angular.forEach(value, function (val) {
            angular.forEach(val[propertyName], function (v) {
                arrayList.push(v)
            });
        });
        return arrayList;
    }
});

HTML

<ul>
    <li ng-repeat="o in ordersList.orders | createarray: 'parcels'">{{o.upid}}</li>
</ul>

Here is working Fiddle

Answer 2

You can just create new array 'parcels' like in demo below:

var app = angular.module('app', []);
app.controller('homeCtrl', function($scope) {
  $scope.data = {
    "orders": [{
      "ordernum": "PRAAA000000177800601",
      "buyer": "Donna Heywood",
      "parcels": [{
        "upid": "UPID567890123456",
        "tpid": "TPID789456789485"
      }, {
        "upid": "UPID586905486090",
        "tpid": "TPID343454645455"
      }]
    }, {
      "ordernum": "ORAAA000000367567345",
      "buyer": "Melanie Daniels",
      "parcels": [{
        "upid": "UPID456547347776",
        "tpid": "TPID645896579688"
      }, {
        "upid": "UPID768577673366",
        "tpid": "TPID784574333345"
      }]
    }]
  };

  $scope.parcels = [];
  angular.forEach($scope.data.orders, function(order) {
    angular.forEach(order.parcels, function(parcel) {
      $scope.parcels.push(parcel)
    })
  })
});

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<div ng-app="app">
  <div ng-controller="homeCtrl">

    <ul>
      <li ng-repeat="o in parcels">{{o.upid}}</li>
    </ul>

  </div>
</div>