mddialog中的angularjs-ng-repeat多次重复

我想要的是打印一个复选框列表：

这是我的HTML代码：

<div id="tourDateForm" class="col-md-12 hidden">
<md-dialog>
    <md-toolbar>
    </md-toolbar>
    <md-dialog-content>
        <form id="tourForm" class="dialogContent">
            <input type="hidden" name="id" ng-model="id">

            <label for="ticket">Ticket</label>
            <label ng-repeat="ticketd in ticketData">
                <input type="checkbox" name="ticket"  value="" required>
            {{ticketd.test}}
            </label>

        </form>
    </md-dialog-content>
    <md-dialog-actions>
    </md-dialog-actions>
</md-dialog>

而我的控制器：

var tours = angular.module('tourDates',['ngMaterial']);

    tours.controller('tourDateCtrl',['$scope','$mdDialog',function ($scope,$mdDialog) {

        $scope.ticketData = [{test:1},{test:2},{test: 3},{test: 4}];

        $scope.showForm = function (ev) {
            $mdDialog.show({
                controller: DialogController,scope: $scope,preserveScope: false,template: angular.element('#tourDateForm').html(),parent: angular.element(document.body),targetEvent: ev
            });
        }

        function DialogController($scope,$mdDialog) {
            $scope.save = function () {
                console.log('submit');
            };
            $scope.cancel = function () {
                $mdDialog.cancel();
            };
        }
}]);

这是一个codepen：

http://codepen.io/cladin/pen/LZxJvJ

任何人都知道发生了什么或我做错了什么？