javascript – angularjs处理$resource $promise错误

如果连接到我的API时出错,有人可以帮我弄清楚如何在我的AngularJS工厂中返回硬编码数据.我的硬编码数据位于另一个名为“dataFactory”的工厂中.感谢您的帮助.

service.factory("ScheduleFactory", ['$http', '$resource', '$q', 'dataFactory', function($http, $resource, $q, dataFactory) {
        var objFactory = {};

        objFactory.getDaysOfWeek = function(includeWeekends) {
            var days = [];
            var API  = $resource(restURL + '/daysOfWeek/');

            API.query()
                .$promise
                    .then(function(data) {
                        isEmpty = (data.length === 0);

                        if (!isEmpty) {
                            days    = data;
                        };
                    })
                    .catch(function(error) {
                        console.log("rejected " + JSON.stringify(error));

                        var data    = null;
                        days    = dataFactory.daysOfWeek;

                        console.log(days.length); // returns 5
                    });


            console.log("after promise " + days.length);  // returns 'after promise 0'

            return days;
        };

我的dataFactory定义如下：

dataApp.factory("dataFactory", function() {
    objDataFactory  = {};

    objDataFactory.daysOfWeek = [
        {   dayName:        'Monday'
            , dayAbbrev:    'Mon'
            , index:        1
            , isSelected:   false
            , isWeekday:    true    }
        , { dayName:        'Tuesday'
             , dayAbbrev:   'Tue'
             , index:       2
             , isSelected:  false
             , isWeekday:   true    }
        , { dayName:        'Wednesday'
             , dayAbbrev:   'Wed'
             , index:       3
             , isSelected:  false
             , isWeekday:   true    }
        , { dayName:        'Thursday'
             , dayAbbrev:   'Thu'
             , index:       4
             , isSelected:  false
             , isWeekday:   true    }
        , { dayName:        'Friday'
             , dayAbbrev:   'Fri'
             , index:       5
             , isSelected:  false
             , isWeekday:   true    }
    ];

    return objDataFactory;
});

解决方法:

我想这就是你要找的东西：

service.factory("ScheduleFactory", ['$http', '$resource', '$q', 'dataFactory', function($http, $resource, $q, dataFactory) {
     var objFactory = {};

     objFactory.getDaysOfWeek = function(includeWeekends) {
          var API  = $resource(restURL + '/daysOfWeek/'), defObj = $q.defer();

          var daysQuery = API.query();
          daysQuery.$promise.then(function(data) {
                    //you can add anything else you want inside this function
                    defObj.resolve(data);
               }, function(error) {
                    //you can add anything else you want inside this function
                    defObj.resolve(dataFactory.daysOfWeek);
               });

            return defObj.promise;
        };

我已经跳过任何数据格式和分配细节,因为无论如何你都有可能改变它们.通过将API查询包装在额外的承诺中,您可以操纵返回的内容.如果您的API可以到达,则以外部承诺的分辨率从中返回数据.否则,您将根据外部承诺的解决方案从其他服务返回您的硬编码数据.

标签：angular-promise,javascript,angularjs,angular-resource
来源： https://codeday.me/bug/20190722/1506401.html