Promise All 的同步代码 [重复]

Question

大家好，我的代码有问题，因为 promise 是以异步方式完成的，我需要它们同步。所以我有这个函数来返回 fullfilled 里面的两个 promise 的值

 ServicesController.prototype.uci = function (device, config, path, section, property, value, apply, commit) {
    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'inicio');

    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'config', config);
    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'path', path);
    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'section', section);
    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'option', property);
    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'value', value);
    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'apply', apply);
    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'commit', commit);

    var values = {};
    values[property] = value;
    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'values', values);

    return Controllers.Ubus.uciRequest('set', {"config": config, "section": section, values}, device)
            .then(function (uciData) {
                createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'uciData', uciData);
                var promises = [];

                if (uciData != null) {
                    createLog('info', __dirname, __filename.slice(__dirname.length + 1, -3), device.id, 'uci', 'depois do if do uciData');

                    if (commit) {
                        createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'commit');
                        var p1 = new Promise(function (resolve, reject) {
                            Controllers.Ubus.uciRequest('commit', {"config": config}, device)
                                .then(function (dataCommit) {
                                    if (dataCommit && dataCommit.hasOwnProperty('result') && dataCommit.result[0] == 0) {
                                        createLog('info', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'commit data', dataCommit);
                                        resolve(dataCommit.result[0]);
                                    } else {
                                        reject("no data");
                                    }
                                }).catch(function (err) {
                                    createLog('error', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'error promise commit', err);
                                });
                        });                         
                        promises.push(p1);
                    }

                    if (apply) {
                        createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'apply');
                        var p2 = new Promise(function (resolve, reject) {
                                Controllers.Ubus.fileExec(device.id, "exec", path, "restart")
                                .then(function (dataApply) {
                                    if (dataApply && dataApply.hasOwnProperty('result') && dataApply.result[0] == 0) {
                                        createLog('info', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'apply data', dataApply);
                                        resolve(dataApply.result[0]);
                                    } else {
                                        reject("no data");
                                    }
                                }).catch(function (err) {
                                    createLog('error', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'error promise apply', err);
                                });
                        });                         
                        promises.push(p2);
                    }
                    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'promises ', promises);
                }
            }).then(function (promises) {
                createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'promises then', promises);
                Promise.all(promises).then(function (values) {
                    createLog('debug', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'promises all', values);
return(values);

                }).catch(function (err) {
                    createLog('error', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'error promise all', err);
                });
            }).catch(function (err) {
                createLog('error', __dirname, __filename.slice(__dirname.length + 1, -3), null, 'uci', 'error then 2', err);
            });
}

根据我的日志，我输入了申请并提交 if。

现在我正在收到此日志：

 [2017-06-08 15:37:39.621] - error: /opt/wscontroller/wscontroller-api/routes/services ServicesController NA uci error promise all {}

谁能帮我解决这个问题？

Answer 1

问题是没有Promise 或其他值实际上是returned 从.then() 链接到Controllers.Ubus.uciRequest() 调用。

Answer 2

你必须先返回 promises 数组，然后回调