Nested queries using javascript in cloud code (Parse.com)

Question

Is it possible to do nested queries in cloud code?

I want to be able to do something like

var adList = [];
var query2 = new Parse.Query(\"QR\");
var          


        

Answer 1

I was able to cobble up the following answer. This works for me. Following the parse.com documentation guidelines for parallel promises. I create two promise arrays. One of them serves as promise array for inner loop. The other one serves as promise array for the outer loop.

Parse.Cloud.define("getFriends", function (request, response) {
  var _ = require('underscore.js');
  var queryFields = request.params.queryFields;
  //var ClassToSearch = Parse.Object.extend("User");

  var promises = [];
  var promises2 = [];
  var FinalResult = [];
 var asyncFunc = function (userIDArray) {
    _.each(queryFields, function (queryField) {
      var query = new Parse.Query(Parse.User);
      query.equalTo("yourColumnName", queryField);
      promises.push(
        query.find().then(function (results) {
       _.each(results, function (resultObj) { 
        //nested query
        var ClassToSearch = Parse.Object.extend("AnotherColumn");
        var query2 = new Parse.Query(ClassToSearch);
        query2.equalTo("yourColumnName", resultObj);
        promises2.push(        
          query2.first().then(function (itinerary) {
          FinalResults.push(itinerary);
        }));

      });
      return Parse.Promise.when(promises2);
    })
          )
    });
    // Return a new promise that is resolved when all of the requests are done 
    return Parse.Promise.when(promises);
  };
  asyncFunc(queryFields).then(function () {
    console.log("all http requests were made");
    response.success(FinalResults);
  }, function (error) {
    console.log("there was some error");
  });
});