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我用 RSVP 包装了一个简单的 jQuery 承诺，并注意到当我故意导致错误时，永远不会调用失败回调。我认为这是因为当您使用 vanilla jQuery 并且回调抛出错误时，返回的 Promise 不会移动到失败状态（与规范相反）。

如果我需要使用 jQuery $.ajax 但我想通过 RSVP 获得真正的解决/拒绝回调，我可以对下面的示例做什么（如果有的话）？

var peoplePromise = new Ember.RSVP.Promise(function(resolve, reject) { 
    $.getJSON('/api/people/', resolve).fail(reject).error(reject);     
});                                                                    

var catPromise = new Ember.RSVP.Promise(function(resolve, reject) {    
    $.getJSON('/api/cats/', resolve).fail(reject).error(reject);       
});                                                                    

Ember.RSVP.all([peoplePromise, catPromise]).then(function(things) {    
    things[0].forEach(function(hash) {                                 
        var thing = App.Person.create(hash);                           
        Ember.run(self.people, self.people.pushObject, thing);         
    });                                                                
    things[1].forEach(function(hash) {                                 
        var wat = hash.toJSON(); //this blows up                                      
        var thing = App.Person.create(hash);                           
        Ember.run(self.people, self.people.pushObject, thing);         
    });                                                                
}, function(value) {                                                   
    alert(value.status + ": promise failed " + value.responseText);    
});
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1 回答 1

2

此处示例：http ://www.youtube.com/watch?feature=player_detailpage&v=g5CSaK3HqVA#t=1080

var ajaxPromise = function(url, options){
  return Ember.RSVP.Promise(function(resolve, reject) {

    var options = options || {};

    options.success = function(data){
      resolve(data);
    };

    options.error = function(jqXHR, status, error){
      reject([jqXHR, status, error]);
    };

    $.ajax(url, options);
  });
};

var peoplePromise = ajaxPromise('/api/people/',{
  dataType: "json"
});

var catPromise = ajaxPromise('/api/cats/',{
  dataType: "json"
});

Ember.RSVP.all([peoplePromise, catPromise]).then(function(things) {
  things[0].forEach(function(hash) {
    var thing = App.Person.create(hash);
    Ember.run(self.people, self.people.pushObject, thing);
  });
  things[1].forEach(function(hash) {
    var wat = hash.toJSON(); //this blows up
    var thing = App.Person.create(hash);
    Ember.run(self.people, self.people.pushObject, thing);
  });
}, function(args) {
  var jqXHR = args[0];
  alert(jqXHR.status + ": promise failed " + jqXHR.responseText);
});

http://emberjs.jsbin.com/aREDaJa/1/

于 2013-10-09T21:25:32.830 回答