emberjs 循环中设置model的不同属性值

//var grades = ['1', '2', '3', '4', '7', '8', '9'];
            var grades = [''];
            grades.forEach(function (item) {
                App.Template.getTemplates(item, term, session).then(function (rs) {

                    var mm = 'm' + item;
                    var m = Ember.Object.create({});
                    m.set( mm,rs);
                    controller.set('model', m);
                    console.log(controller.get('model'));
                }, function (error) { alert('获取错误！'); });
            });