Question

我有以下提供商：

globalLinksApp.factory('sectionStatus', function ($http: ng.IHttpService ) {
    return  {
            currentStatus: function (section) {
            let restBaseUrl = Url;
            $http
                .get(restBaseUrl, { withCredentials: true })
                .then(
                (response) => {
                    let apiResult = <ApiResult<[SP.News.SectionStatus]>>(response.data);
                    let status =  apiResult.data;
                    console.log("$scope.status called from factory = " + status.filter(a => a.section == section)[0].hidden);
                    return (status.filter(a => a.section == section)[0].hidden);                        
                },
                (errorResponse) => {
                    console.log('ERROR obtaining sections status: ' + JSON.stringify(errorResponse));
                });
        }
    }
});

然后将其注入以下控制器：

globalLinksApp.controller('GlobalFunctionsCtrl', ($scope, sectionStatus, $q: ng.IQService) => {
        $scope.webApplicationUrls = webApplicationUrls;
        let promotedLinkManager = new SP.PromotedLinks.PromotedLinkManager(SP.WebApplicationUrls.inside);
        let listGuid = '1234';

        $q.when(promotedLinkManager.getSchillingAppLinks(listGuid))
            .then((promotedLinks: [SP.PromotedLinks.PromotedLink]) => {
                $scope.promotedLinks = promotedLinks;
                                    $q.when(sectionStatus.currentStatus('GlobalFunctions')).then((a) => {
                    $scope.status = a;
                    console.log("scope status in the then block is: " + $scope.status);
                });
                console.log("$scope.status called from GlobalFunctionsCtrl = "+ $scope.status);
                $scope.isThisSectionHidden = ($scope.status == 'No');
                console.log("$scope.isThisSectionHidden = " + $scope.isThisSectionHidden);
            });

        $scope.srDone = () => {
            //code
        }
    });

控制台按以下顺序显示日志消息：

$scope.status called from GlobalFunctionsCtrl = undefined
$scope.isThisSectionHidden = false
scope status in the then block is: undefined
$scope.status called from factory = No

我需要利用提供程序API调用提供的结果，但是，即使在使用then之后，似乎结果也不会在我希望的时候返回。我需要做些什么才能解决这个问题？

Answer 1

在链接方面，Promise非常简单。如果结果未显示在下一个then回调中，或者它似乎没有等待先前的承诺完成，则表示未从先前的then返回承诺。

应该是：

return $http.get(...)...

处理在另一个控制器中调用异步提供程序的结果

1 个答案: