解析云代码-承诺问题

Question

Here is my code

Parse.Cloud.define('filters', function(request, response){
var _ = require('underscore');
var customerGeoPoint = request.params.geolocation;
var rating = request.params.rating

var finalList = [];
// var arr = [];
var promises = [];
var query = new Parse.Query('ServiceProvider');
query.withinMiles("geoLocation", customerGeoPoint, 10);

query.find().then(function(spobjs){
  return spobjs
}).then(function(newval){   
   var query2 = new Parse.Query('Customer');
   for(i in newval){
     query2.withinMiles('geoLocation', newval[i].get('geoLocation'), newval[i].get('serviceRadius'));
     var sp = query2.first()
       if(sp != null)
       {
         finalList.push(newval[i]);
       }
   }
   return finalList ;
}).then(function(resval){
    var arr = [];
    var arr = _.sortBy(resval,'averageRating'); ** This Line doesn't work **
    console.log(arr[0]);
    return arr ;
}).then(function(checkval){

    response.success(checkval);

},function(error){
    // console.log(error);
    response.error(error);
});

});

In the above code the line which reads "This Line doesn't work" does nothing. I have required underscore.js but still it doesn't sort the array. finalList value gets returned to the then promise after but it doesn't sort it and returns the same value as finalList . Can someone tell me what's the issue with this code?

Answer 1

使用underscorejs对解析对象进行排序时，iteratee必须使用get()返回属性的值。

var arr = _.sortBy(resval, function(o) { return o.get('averageRating'); });