Angularjs Manejando $ Resource $ Promise Errores

Question

¿Podría alguien ayudarme a descubrir cómo devolver los datos codificados en mi fábrica de Angularjs si hay un error que se conecta a mi API?Mis datos de codificación dura se encuentran en otra fábrica llamada "DataFactory".Aprecie la asistencia.

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;
        };

Mi Facturación se define de la siguiente manera:

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;
});

Answer 1

Me gustaría pensar que esto es lo que está buscando:

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;
        };

He omitido los detalles de formato y asignación de datos porque es responsable de cambiarlos de todos modos.Al envolver su consulta API en una promesa adicional que obtiene la capacidad de manipular lo que se devuelve.Si se puede llegar a su API, devuelve los datos de él en la resolución de su promesa externa.De lo contrario, devuelve sus datos codificados de su propio servicio en la resolución de su promesa externa.

Answer 2

No catch block, use a regular error callback function:

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

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

                    var data    = null;
                    days    = dataFactory.daysOfWeek;

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

See in the docs:

then(successCallback, errorCallback, notifyCallback) – regardless of when the promise was or will be resolved or rejected, then calls one of the success or error callbacks asynchronously as soon as the result is available. The callbacks are called with a single argument: the result or rejection reason. Additionally, the notify callback may be called zero or more times to provide a progress indication, before the promise is resolved or rejected.