无法将数据从服务绑定到Ionic

Question

您好我想将来自symfony Back-end的数据绑定为json响应，如下所示。

控制器

app.controller('DashboardCtrl',function($scope,$state,DashBoardServices) {

$scope.allChilds = [];

$scope.getAllChildDetails = function($http) {

    DashBoardServices.getAllChild("57cd019afbe0855c0e8b4568")
        .then(function (response) {

            $scope.allChilds = response.data;
            //grant access to the app
            if(response.data.MessageId == 1) {                    
                $state.go("child");//want to list all child data in this template
            }else{
                $state.go("dash");
            }

        });
}
});

服务

app.factory('DashBoardServices', function($http) {

 return {
         getAllChild: function (parentId) {
         return $http.post('http://127.1.1.0:8080/EduboldPortalApp/eduboldportal/web/app_dev.php/api/all/child', {
         parentId: parentId

         });
         }
});

Json回复

{
"MessageId": 1,
"data": [{
    "parentId": "57cd019afbe0855c0e8b4568",
    "id": {
        "$id": "57ccffd2fbe085880c8b4567"
    },
    "firstName": "PRATHAMVEER",
    "middleName": "SINGH",
    "lastName": "CHAHAL"
}, {
    "parentId": "57cd019afbe0855c0e8b4568",
    "id": {
        "$id": "57cd019afbe0855c0e8b4567"
    },
    "firstName": "GUNSHEEN",
    "middleName": "KAUR",
    "lastName": "CHAHAL"
}]
}

我有一个名为： allChild.html 的模板，我想列出所有孩子，如下所示：

  <ion-content>
        <div class="list">
            <a ng-repeat="chd in allChilds"   class="item item-thumbnail-left">
           {{chd.firstName}}               

        </a>
</ion-content>

但是它没有渲染数据，请帮助我刚开始使用Ionic ..

提前致谢