AngularJs : récupération de donnée via un json

Bonjour,
Je travaille actuellement sur Angular JS et j'ai une erreur que j'arrive pas a résoudre, je m'explique :
j'ai un fichier json qui ressemble a ceci :

[
  {
    "nid": "24",
    "vid": "24",
    "type": "page",
    "language": "fr",
    "title": "Presse",
    "uid": "1",
    "status": "1",
    "created": "1390404181",
    "changed": "1390404181",
    "comment": "0",
    "promote": "0",
    "sticky": "0",
    "tnid": "0",
    "translate": "0",
    "uri": "http://achahada.fr/json/articles/node/24"
  }

ou j'ai plusieurs articles, j'ai commencé par afficher tout les titres des articles en lien jusqu'ici aucun problème, mon problème se situe lorsque je veut récupéré un article et ces informations par rapport a son 'nid' en cliquant sur le lien du titre.

Du coup j'ai testé plusieurs log pour voir se que je récupérais, et il apparemment je récupère un undefined alors que mon routeParams.nid récupère bien le nid de mon objet mais il s'affiche d'abord en undefined puis ensuite il obtiens la valeur du nid. some help plz voici mon code:

        <!-- Script JS -->
        <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.14/angular.min.js"></script>
        <script src="https://code.angularjs.org/1.2.14/angular-sanitize.js"></script>
        <script src="https://code.angularjs.org/1.2.14/angular-route.js"></script>

        <script>
        // mon module app contient les module de Route et de Sanitize 
        var app = angular.module('app', ['ngSanitize', 'ngRoute'])


        // systeme de routing
        app.config(function($routeProvider){
            $routeProvider
                .when('/home', {templateUrl: 'partials/home.html', controller: 'contentsCtrl'})
                .when('/test/:nid', {templateUrl: 'partials/test.html', controller: 'contentsCtrl'})
                .otherwise({redirectTo : '/'});
        })

        app.factory('ContentFactory', function(){
            var factory = {
                contents : [
                  {
                    "nid": "24",
                    "vid": "24",
                    "type": "page",
                    "language": "fr",
                    "title": "Presse",
                    "uid": "1",
                    "status": "1",
                    "created": "1390404181",
                    "changed": "1390404181",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/24"
                  },
                  {
                    "nid": "23",
                    "vid": "23",
                    "type": "page",
                    "language": "fr",
                    "title": "O\u00f9 acheter nos produits ?",
                    "uid": "1",
                    "status": "1",
                    "created": "1390305089",
                    "changed": "1394450294",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/23"
                  },
                  {
                    "nid": "22",
                    "vid": "22",
                    "type": "page",
                    "language": "fr",
                    "title": "Agr\u00e9ment",
                    "uid": "1",
                    "status": "1",
                    "created": "1386698804",
                    "changed": "1386698804",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/22"
                  },
                  {
                    "nid": "21",
                    "vid": "21",
                    "type": "diaporama",
                    "language": "fr",
                    "title": "Le contr\u00f4le Achahada",
                    "uid": "1",
                    "status": "1",
                    "created": "1386674723",
                    "changed": "1386681904",
                    "comment": "0",
                    "promote": "1",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/21"
                  },
                  {
                    "nid": "20",
                    "vid": "20",
                    "type": "diaporama",
                    "language": "fr",
                    "title": "Bourget 2013",
                    "uid": "1",
                    "status": "1",
                    "created": "1386674103",
                    "changed": "1386674103",
                    "comment": "0",
                    "promote": "1",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/20"
                  },
                  {
                    "nid": "19",
                    "vid": "19",
                    "type": "diaporama",
                    "language": "fr",
                    "title": "Halal Expo 2013",
                    "uid": "1",
                    "status": "1",
                    "created": "1386672569",
                    "changed": "1386672902",
                    "comment": "0",
                    "promote": "1",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/19"
                  },
                  {
                    "nid": "18",
                    "vid": "18",
                    "type": "page",
                    "language": "fr",
                    "title": "La tra\u00e7abilit\u00e9",
                    "uid": "1",
                    "status": "1",
                    "created": "1386611718",
                    "changed": "1386611718",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/18"
                  },
                  {
                    "nid": "17",
                    "vid": "17",
                    "type": "page",
                    "language": "fr",
                    "title": "La d\u00e9coupe et la transformation",
                    "uid": "1",
                    "status": "1",
                    "created": "1386611363",
                    "changed": "1386611363",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/17"
                  },
                  {
                    "nid": "16",
                    "vid": "16",
                    "type": "page",
                    "language": "fr",
                    "title": "Le sacrifice",
                    "uid": "1",
                    "status": "1",
                    "created": "1386611319",
                    "changed": "1386611319",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/16"
                  },
                  {
                    "nid": "15",
                    "vid": "15",
                    "type": "page",
                    "language": "fr",
                    "title": "Le contr\u00f4le",
                    "uid": "1",
                    "status": "1",
                    "created": "1386611222",
                    "changed": "1386611345",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/15"
                  },
                  {
                    "nid": "14",
                    "vid": "14",
                    "type": "page",
                    "language": "fr",
                    "title": "L'association Achahada",
                    "uid": "1",
                    "status": "1",
                    "created": "1381422338",
                    "changed": "1386610438",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/14"
                  },
                  {
                    "nid": "13",
                    "vid": "13",
                    "type": "page",
                    "language": "fr",
                    "title": "Nos engagements",
                    "uid": "1",
                    "status": "1",
                    "created": "1381421655",
                    "changed": "1381421655",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/13"
                  },
                  {
                    "nid": "12",
                    "vid": "12",
                    "type": "page",
                    "language": "fr",
                    "title": "L'\u00e9lectronarcose",
                    "uid": "1",
                    "status": "1",
                    "created": "1381421345",
                    "changed": "1381421345",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/12"
                  },
                  {
                    "nid": "11",
                    "vid": "11",
                    "type": "page",
                    "language": "fr",
                    "title": "Histoire",
                    "uid": "1",
                    "status": "1",
                    "created": "1381420332",
                    "changed": "1386610097",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/11"
                  },
                  {
                    "nid": "10",
                    "vid": "10",
                    "type": "page",
                    "language": "fr",
                    "title": "Vid\u00e9os",
                    "uid": "1",
                    "status": "1",
                    "created": "1381419455",
                    "changed": "1381419455",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/10"
                  },
                  {
                    "nid": "9",
                    "vid": "9",
                    "type": "page",
                    "language": "fr",
                    "title": "Photos",
                    "uid": "1",
                    "status": "1",
                    "created": "1381419425",
                    "changed": "1386615025",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/9"
                  },
                  {
                    "nid": "8",
                    "vid": "8",
                    "type": "page",
                    "language": "fr",
                    "title": "Restaurants",
                    "uid": "1",
                    "status": "1",
                    "created": "1381419241",
                    "changed": "1386612930",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/8"
                  },
                  {
                    "nid": "7",
                    "vid": "7",
                    "type": "page",
                    "language": "fr",
                    "title": "Boucherie",
                    "uid": "1",
                    "status": "1",
                    "created": "1381419128",
                    "changed": "1386612544",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/7"
                  },
                  {
                    "nid": "6",
                    "vid": "6",
                    "type": "page",
                    "language": "fr",
                    "title": "Fournisseur",
                    "uid": "1",
                    "status": "1",
                    "created": "1381419064",
                    "changed": "1386612386",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/6"
                  },
                  {
                    "nid": "5",
                    "vid": "5",
                    "type": "page",
                    "language": "fr",
                    "title": "Centre d'Elaboration des Viandes",
                    "uid": "1",
                    "status": "1",
                    "created": "1381337392",
                    "changed": "1386612838",
                    "comment": "0",
                    "promote": "0",
                    "sticky": "0",
                    "tnid": "0",
                    "translate": "0",
                    "uri": "http://achahada.fr/json/articles/node/5"
                  }
                ],

                getContents : function(){
                    return factory.contents;
                },
                getContent : function(nid){
                    var content = {};
                    angular.forEach(factory.contents, function(value, key){
                        if(value.nid == nid){
                            content = value
                        }
                    });
                    return content;
                },
            }
            return factory;
        })


        app.controller('contentsCtrl', function ($scope, ContentFactory, $routeParams){

                var content = ContentFactory.getContents($routeParams.nid);
                $scope.contents = ContentFactory.getContents();
                // $scope.title = content[8].title;
                console.log(content);
                console.log($routeParams.nid);
                //test
                console.log(content[0].title);
        });

        </script>