Parse.com: query.each executes in parrallel, reaches limit - background

Question

I am running a batch job and I would like them to be run serially for each query result
The problem is that it seems that query.each executes everything in parrallel
How can I change my code to have everything execute serially?
Parse.Cloud.job("fetchMenus", function(request, status) {
var counter = 0;
// Query for all users
var LocationSP = Parse.Object.extend("Location");
var query = new Parse.Query(LocationSP);
query.doesNotExist("menu");
query.equalTo("city_lc","new york");
// query.limit(10);
var p = Parse.Promise.as("");
query.each(function(location) {
p = p.then(function(){
if (counter % 100 === 0) {
// Set the job's progress status
status.message(counter + " users processed.");
}
// console.log(location);
// console.log(location.get("location_id"));
Parse.Cloud.run('getMenu2', {alias: location.get("location_id") }, {
success: function(result) {
// result is 'Hello world!'
counter += 1;
return Parse.Promise.as("1");
},
error: function(error) {
return Parse.Promise.as("1");
}
});
})
return p;
}).then(function() {
// Set the job's success status
status.success("Migration completed successfully.");
}, function(error) {
// Set the job's error status
status.error("Uh oh, something went wrong." + error);
});
});

Answer 1

Both query.each and Parse.Cloud.run return a promise, so you can simply write as following:
Parse.Cloud.job("fetchMenus", function(request, status) {
var LocationSP, counter, query;
counter = 0;
LocationSP = Parse.Object.extend("Location");
query = new Parse.Query(LocationSP);
query.doesNotExist("menu");
query.equalTo("city_lc", "new york");
return query.each(function(location) {
if (counter % 100 === 0) {
status.message(counter + " users processed.");
}
return Parse.Cloud.run('getMenu2', {
alias: location.get("location_id")
}).then(function(result) {
counter += 1;
return Parse.Promise.as("1");
}, function(error) {
return Parse.Promise.as("1");
});
}).then(function() {
return status.success("Migration completed successfully.");
}, function(error) {
return status.error("Uh oh, something went wrong." + error);
});
});