[英]Angular promises in $q.all are not being rejected
我有一个看起来像(Manufacturer -> Vehicle Type -> Vehicle Model -> Vehicle Submodel)
的实体层次结构。 每个制造商都有多种车辆类型,每种车辆类型都有多种型号,每种型号都有多种子型号。
我需要检索给定制造商和类型的车辆模型的列表,然后对于每个模型,检索其所有子模型( getSubmodels
)。 将它们全部提取后,我将其放入JSON对象。 我正在尝试使用Angular的$q
模块来确保在继续执行之前已检索到所有子模型-aka我需要先解决所有诺言,然后才能继续并呈现页面组件。
“快乐”路径可以正常工作,但是,如果$q.all().then
模型的请求之一出错,则子模型函数拒绝的承诺不会被$q.all().then
块捕获,因此整个getVehicleHierarchy承诺都会不被拒绝。
angular.module('uiApp.services.hierarchy', ['restangular'])
.service('VehicleHierarchy', function VehicleHierarchy($http, $q, Restangular) {
this.getVehicleHierarchy = function (manufacturerId, vehicleTypeId, vehicleModelId) {
var that = this;
var deferred = $q.defer();
var promise = deferred.promise;
var promises = [];
Restangular.configuration.baseUrl = urlBuilder.buildHierarchyServiceUrl() + '/vehicle-hierarchy';
Restangular.one('manufacturer', manufacturerId).one('type', vehicleTypeId).one('class', vehicleClassId).customGET('models')
.then(function (models) {
var result = {};
_.forEach(models.result, function (model) {
result[parseInt(model.id)] = model;
});
_.forEach(result, function (model) {
promises.push(that.getSubmodels(manufacturerId, vehicleTypeId, vehicleClassId, model.id));
});
$q.all(promises).then(function (results) {
var i = 0;
_.forEach(result, function (model) {
result[parseInt(model.id)].subModels = results[i++];
}, function (errors) {
deferred.reject(errorResponse);
});
deferred.resolve(result);
});
}, function(error) {
deferred.reject('error!');
});
return promise;
};
this.getSubmodels = function (manufacturerId, vehicleTypeId, vehicleClassId, modelId) {
var submodels = {};
var deferred = $q.defer();
Restangular.configuration.baseUrl = urlBuilder.buildHierarchyServiceUrl() + '/vehicle-hierarchy';
Restangular.one('manufacturer', brandId).one('type', vehicleTypeId).one('class', vehicleClassId).one('model', modelId)
.customGET('submodels').then(function (submodelResponse) {
_.forEach(subclassResponse.result, function (subModel) {
subclasses[parseInt(subModel.id)] = subModel;
});
deferred.resolve(subclasses);
}, function (error) {
deferred.reject('error'!);
});
return deferred.promise;
};
});
});
您需要返回$q.all
呼吁您的误差函数中then
抓住它:
return $q.all(promises).then(function (results) {
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.