解决多重承诺Node-JS

Question

我有很多承诺。

var defered = q.defer();
// promises is a array which will have different promises
var promises = [];

q.all(promises).then(function(response){

// SUSSECCFULLY RESOLVED ALL PROMISE THEN EXECUTION COME HERE

}, function(error){

// IF ANY PROMISE FAILED THEN EXECUTION COME HERE

});

我要处理所有的承诺，无论它们失败还是解决。

Answer 1

用例1：

您想将错误分别处理并成功处理所有未调用的错误：

 var myApp = angular.module('myApp', []); function MyCtrl($scope, $q, $timeout) { function prOne(){ var d = $q.defer(); setTimeout(function(){ d.reject(); }, 100); return d.promise; } function prTwo(){ var d = $q.defer(); setTimeout(function(){ d.resolve(); }, 100); return d.promise; } $q.all([prOne().catch(function(){ console.log('fail for one'); return $q.reject() }), prTwo()]).then(function(){ console.log('success'); return $q.resolve(); }).catch(function(){ console.log('error'); });; } myApp.controller('MyCtrl', MyCtrl); 

用例2：

您想分别处理错误并成功调用所有方法：

 var myApp = angular.module('myApp', []); function MyCtrl($scope, $q, $timeout) { function prOne(){ var d = $q.defer(); setTimeout(function(){ d.reject(); }, 100); return d.promise; } function prTwo(){ var d = $q.defer(); setTimeout(function(){ d.resolve(); }, 100); return d.promise; } $q.all([prOne().catch(function(){ console.log('fail for one'); return $q.resolve() }), prTwo()]).then(function(){ console.log('success'); return $q.resolve(); }).catch(function(){ console.log('error'); });; } myApp.controller('MyCtrl', MyCtrl);