利用leancloud做小程序的后台，拿不到数据

[Benhugh]

利用leancloud做小程序的后台，但是在前台拿不到数据，
下面是前台的代码
AV.Cloud.run('mark',params).then(function (data) {
//data = JSON.parse(data);
console.log("get data from cloud "+JSON.stringify(data));
})
后台的代码

var query = new AV.Query('controlMark');
var showTime = request.params.showTime;
var rowTime = request.params.rowTime;
var id = request.params.ID;
query.equalTo('ID', id);
query.descending('createdAt');
query.limit(1);
query.find().then(function (cmark) {
 var controlMark = AV.Object.extend('controlMark');
    var mark = new controlMark();
    mark.set('markTime', showTime);
    mark.set('day', 0);
    mark.set('rowTime', rowTime);
    mark.set('ID', id);
    mark.save().then(function(controlM){

      var yesterday = self.getYesterday();
  var queryPay = new AV.Query('controlPay');
  queryPay.equalTo('ID', id);
  queryPay.equalTo('payDay',yesterday);
  return queryPay.find().then(function(yesterdayPay){
    if(yesterdayPay.length != '0'){
      var controlPayback = AV.Object.extend('controlPayback');
      var cpayback = new controlPayback();
      cpayback.set('markDay', rowTime);
      cpayback.set('ID', id);
      return cpayback.save().then(function(){
        var loadingHidden = true;
        var conut = 2000;
        var toastText = 'Success';
        var result = {
            'loadingHidden':loadingHidden,
            'conut':conut,
            'toastText':toastText
        };
        return result;
      });
    }
  });
})
})

前台拿到的data结果是undefined，这是为什么呢？

[leeyeh]

return query.find()
return mark.save()