Question

我有一个控制器调用一个服务，它执行一些http调用并将一组数据返回给我的控制器。我面临的问题是我的服务在所有http调用完成之前返回一些数据（通常是emtpy），因此$ scope.myForksLinks未定义。

控制器：

myService.getMyData()
    .then(function(response) {

        $scope.myUrl = response.myForksLinks;

    });

为MyService：

handleResolveReject() {
    return promise.then(function(v) {
        return {v:v, status: "resolved"};
    }, function(e) {
        return {e:e, status: "rejected"};
    });
},

getMyData() {

    const that = this;
    var deferred = that._$q.defer();
    var httpResponse = [];

    var httpLinks = [
        {myTablesLinks: this.tablesLinks}, // this.tablesLinks = [http://tablelink1.come, http://anotherTableLink.com]
        {myGlassesLinks: this.glassesLinks},
        {myPlatesLinks: this.platesLinks},
        {myCupsLinks: this.cupsLinks},
        {myForksLinks: this.forksLinks},
    ]

    var getData = function() {
        _.forEach(httpLinks, function(httpSet, k) {
            _.forEach(httpSet, function(links, httpName) {
                var promises = [];

                angular.forEach(links, function(link) {
                    var promise = that._$http({
                        method: 'GET',
                        url: link + '/my/end/point',
                        responseType: 'json'
                    });
                    promises.push(promise)
                });

                return Promise.all(promises.map(that.handleResolveReject))
                    .then(function(results)) {

                        httpResponse.push({httpName: results.filter(x => x.status === 'resolved')});

                    });
            });
        });

        return httpResponse;
    };

    deferred.resolve(getData());
    return deferred.promise;


}

Answer 1

这些方面的东西：

var allPromises = [];
_.forEach(httpLinks, function (httpSet, k) {
    allPromises = _.map(httpSet, function (links, httpName) {
        var promises = [];
        angular.forEach(links, function (link) {
            var promise = that._$http({
                method: 'GET',
                url: link + '/my/end/point',
                responseType: 'json'
            });
            promises.push(promise);
        });

        return Promise.all(promises.map(that.handleResolveReject))
            .then(function (results) {
                httpResponse.push({ httpName: results.filter(x => x.status === 'resolved') });
            });
    });
});
Promise.all(allPromises).then(() => {
    // here you go
})

在所有http调用完成之前返回服务

1 个答案: