传递调用服务器方法的结果中的Meteor异常

Question

以下代码：我有一个模板，用户可以在表单中输入日期并按下提交按钮。现在我想检查这个输入日期是否已存在于集合中。如果存在，将弹出警报。同时我想检查用户是否正在更新现有日期或创建新日期。

Client.js

var currData = {_id: speakerDateArray[i]._id,
                        prID: prodIDVar,
                        title: currTitle,
                        start: speakerDateStartVar,
                        end: speakerDateEndVar};
if(allSpeakerDates.length == 0){
       Meteor.call('insertSpeakerDate', currData);
}
else {       
Meteor.call('delayedDateCompare', currData, function(err, result){
     var isDateExists = result; 
     console.log(err + ' ' +result);

     if(isDateExists === true) { 
         var isIdExists = Events.findOne({_id: speakerDateArray[i]._id});
         if(isIdExists !== undefined){ 
              console.log('ID vorhanden --> update');
              Meteor.call('updateSpeakerDate', currData);
         }
         else {
              alert('date already exist');
         }
      }
      else {
         var isIdExists = Events.findOne({_id: speakerDateArray[i]._id});
         if(isIdExists !== undefined){
              console.log('ID exists --> update');
              Meteor.call('updateSpeakerDate', currData);
          }
          else {
               console.log('ID not exist --> insert');
               Meteor.call('insertSpeakerDate', currData);
          }
       }
});

Server.js

function compareDates(delay, data, callback) {
        var tmpStart = moment(data.start).toDate(); 
        var tmpEnd = moment(data.end).toDate();   
        var allSpeakerDates = Events.find({categorie: 'speaker'}).fetch(); 
        var result;
        for(i=0; i<allSpeakerDates.length; i++) { 
            var exStart = moment(allSpeakerDates[i].start).toDate(); 
            var exEnd = moment(allSpeakerDates[i].end).toDate();     

            if (tmpStart > exStart && tmpEnd < exEnd) { 
                console.log('status 1');
                result = true;
            }
            else if(tmpStart < exStart && tmpEnd > exStart) { 
                console.log('status 2');
                result = true;
            }
            else if(tmpStart < exEnd && tmpEnd > exEnd) { 
                console.log('status 3');
                result = true;
            }
            else { 
                console.log('status 4');
                result = false;
            }
        }
        setTimeout(function() { 
            callback(null, result);
        }, delay);
    }
    var wrappedCompareDates = Async.wrap(compareDates);

方法

Meteor.methods({
        'insertSpeakerDate': function(data){
            Events.insert({
                _id: data._id,
                prID: data.prID,
                title: data.title,
                start: data.start,
                end: data.end,
                color: '#009C95',
                categorie: 'speaker'
            });
        },
        'updateSpeakerDate': function(data) {
            console.log('Speakerdate updated: '+data._id);
            Events.update({_id: data._id}, {
                $set: {
                    title: data.title,
                    start: data.start,
                    end: data.end
                }
            });
        },
        'delayedDateCompare': function(data) {
            var response = wrappedCompareDates(1000, data); 
            return response;
        },

我收到错误“提供调用'delayedDateCompare'的结果时出现异常”。我认为这是由于流星的异步功能，但我该如何解决呢？