Eroor -TypeError：无法读取未定义的属性'then'

Question

我正在学习Angular JS并拥有以下工厂。在将其记录到控制台时，我可以看到返回的数据。

app.factory('SelectOptionFactory', ['$http', '$q', 'DatabaseService', function ($http, $q, DatabaseService) {

    'use strict';

    //variables

    var routeControllerURL = 'SelectOption/';

    return {
        getSelectOptions: function getSelectOptions() {
            var apiRouteMember = [];
            apiRouteMember.push(routeControllerURL + 'SelectOptionList')
            apiRouteMember.push('APPLICATION_STATUS');
            DatabaseService.getDataFromAPIRoute(apiRouteMember).then(function (response) {
                return response.data;
            });
        }
    }
}]);

然后我的控制器具有以下功能，在按钮点击时调用该功能，我收到此错误：

angular.js:13920 TypeError: Cannot read property 'then' of undefined
    at m.$scope.addInventoryApplicationDetails (Inventory_Controller.js:228)

    $scope.addInventoryApplicationDetails = function () {
        $scope.applicationStatus = [];

        SelectOptionFactory.getSelectOptions().then(function (data) {
            $scope.applicationStatus = data;
        }).catch(function () {
            $scope.error = 'unable to get the data';
        });
    };

我做错了，因为.then()方法没有返回通过successCallback，errorCallback的返回值解析或拒绝的新promise？

Answer 1

MixinA没有返回任何内容。你只需要回复承诺

getSelectOptions()