javascript - 链接 $resource promise 的 Angular 问题

Question

我试图为我拥有的这项服务链接一些 promise ，但 $stateprovider 无需等待 $q 即可解析。这导致我的 Controller 只返回空数组的结果对象，并且稍后填充该对象。我的 promise 链哪里出了问题？

我的 $stateprovider:

    .state('somestate', {
        resolve: {
            neededvalue: function(anotherservice) {
                return anotherservice.getData(); //this one works pretty well , but doesn't use any chaining
            },
            finalvalue: function(myService, neededvalue) {
                return myService.startChain(neededvalue);
            }
        }
    }

我的服务:

    app.factory("myService",
            ['$resource', '$q',
        function ($resource, $q) {

            var firstApi = $resource("api/somewhere/first", {}, { "getData": { method: "POST" } });
            var secondApi = $resource("api/somewhere/second", {}, { "getData": { method: "POST" } });

            var result = {
                array: []
            };

            var myService = {
                startChain: startChain
            };

            return myService;

            function startChain(someNeededValues) {
                var deferred = $q.defer();

                firstApi
                    .getData(someNeededValues.values).$promise
                    .then(function (data) {
                        result.value = data.value;
                    })
                    .then(recurringAction)
                    .then(deferred.resolve(result));

                return deferred.promise;
            }

            function recurringAction() {
                return secondApi.getData(result.value, function (data) {
                    angular.copy(data.array, result.array);   
                }).$promise;
            }

        }]);

Answer 1

当您将 deferred.resolve(result) 作为回调传递给 promise 时，不确定您的脚本是否按照预期的方式工作...

所以改变一下

                .then(deferred.resolve(result));

到

                .then(function(){
                    deferred.resolve(result)
                });