问ajax请求数据未加载- Angular JS

EN

angular.module("confessions_module").factory("Universities",function(){

    var service = {};

        service.getUniversitiesAjax=function(callback)
        {
            $.ajax({
                type:'GET',
                url:'myurl',
                success:function(e)
                {
                    universitiesList = $.parseJSON(e);
                    callback(universitiesList);
                }

            });

//                var a = [{ 'name':'asdasdsad','id':123},{ 'name':'mozi','id':123}];
 //              callback(a)
        }
    return service;
});

   Universities.getUniversitiesAjax(
    function(university)
    {

        for(var i=0;i<university.length;i++)
        {
            var unii = { 'name' : university[i].name , 'id' : university[i].id };
            $scope.unis.push(unii);
        }
    }
);

                   <select id="dd_universities">
                        <option ng-repeat="uni in unis">{{uni.name}}</option>
                    </select>