Query Inside Parse Cloud For Loop

I have been trying to run my Parse Cloud Code for some time and can not seem to get around this problem: I have an array of Parse objectId's called IDArray. I then am sending the a

Solution 1:

I think the problem is you are sending response multiple times, you should wait for all the promises to finish and then send a response:

Parse.Cloud.define('updateAllUsers', function(request, response) {
    var UserData = Parse.Object.extend('UserData');
    var query = new Parse.Query(UserData);
    varlist = request.params.listID;
    var currentuser = request.params.user;

    functioncheckUserData(userdata){   // returns parse promise for a particular userdatareturn query.get(userdata).then(function(){
            UserData.addUnique('Done', +1);
            UserData.save();            
        });
    }

    Parse.Promise.when(list.map(checkUserData)) // mapping all the elements in the list to resp promises
        .then(function(){   // on success
            response.success('Should add up');
        }).catch(function(e){    // on failure
             response.error('something went wrong' );
        });
});

Edit: if for some reason map is not available( in case of older browsers or list not being an normal javascript array), you can do something like:

Parse.Cloud.define('updateAllUsers', function(request, response) {
    var UserData = Parse.Object.extend('UserData');
    var query = new Parse.Query(UserData);
    varlist = request.params.listID;
    var currentuser = request.params.user;
    var promises = [];
    functioncheckUserData(userdata){   // returns parse promise for a particular userdatareturn query.get(userdata).then(function(){
            UserData.addUnique('Done', +1);
            UserData.save();            
        });
    }

    for(var i=0;i<list.length;i++){
        promises.push(checkUserData(list[i]));
    }


    Parse.Promise.when(promises) // once all the promises are resolved...
        .then(function(){   // on success
            response.success('Should add up');
        }).catch(function(e){    // on failure
             response.error('something went wrong' );
        });
});