解决多个 Promise 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

});

我想处理所有承诺，无论它们失败还是解决。

Answer 1

用例 1：

您希望处理要单独处理的错误并在所有未调用的情况下成功：

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：

您希望处理要单独处理的错误并在所有调用时成功：

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);