Unable to access properties of JSON code through angularJS service

Question

I am trying to access properties of the following JSON structure through AngularJS factory and service methods:

{
    "@context": {
        "firstname": "http://xmlns.com/foaf/0.1/firstname",
        "lastname": "http://xmlns.com/foaf/0.1/lastname"
    },
    "members":[
        {
            "firstname":"Debjit",
            "lastname":"Kumar"
        },
        {
            "firstname":"Hari",
            "lastname":"Haran"
        },
        {
            "firstname":"Kaushik",
            "lastname":"Shrestha"
        }
    ]
}

But I am not able retrieve properties of the retrieved JSON object. The following is my angularJS code:

angular.module('rdfa',['ngResource']).config(['$routeProvider', function ($routeProvider) {
    $routeProvider.when('/', {controller: RdfaCtrl});
}])
.factory('members', function($resource){
    return $resource('Json.json', {}, { query: {method:'GET', isArray:false} } );
})
.service('jsonservice',function(members){
    this.members=members.query();
});
function RdfaCtrl($scope,jsonservice){
    $scope.members=jsonservice.members.members;
    console.log(jsonservice.members);  // outputs correct JSON structure
    console.log(jsonservice.members.members);  // outputs undefined
    console.log(jsonservice.members['@context']);  // outputs undefined
}

bmleite · Accepted Answer · 2013-03-04 12:25:02Z

2

You are making an asynchronous HTTP request, you cannot just simply print the output on the same call cycle. In order to do that you need to add a success callback handler in the query action, for example:

members.query(function(value) {
  console.log(value); // Resource object
  console.log(value.members); // members object      
  console.log(value['@context']);  // @context object
});

Check this plunker for a working example: http://plnkr.co/edit/TFlQ6cDkIA3rpjkvHtOA?p=preview

answered Mar 4, 2013 at 12:25

bmleite

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