Find query don't limit fields - mongodb

Question

I got the following query:
query =
{
application: application,
creationTime:{
$gte: start_date.valueOf(),
$lte: end_date.valueOf()
}
},
{
application: 1,
creationTime: 1,
buildSystem: 1,
_id:1
}
var ut_data = db.my_collection.find(query).sort({ _id: -1 }).forEach(function(doc) {print(doc.testStatus)})
Where I want to limit the fields in the result to application, creationTime and buildSystem, to not load the whole documents matching the condition.
Once I print testStatus, it seems like is also available, moreover all fields are available. How can I limit the fields in the result?
(I also tried: {fields:{application: 1, creationTime: 1, buildSystem: 1, _id: 1}} as proposed in Limit Field in Mongodb find() query not working
)

Answer 1

I was passing the two parameters of the query wrongly, so the second part was not considered, I fixed it like this:
query =
[{
application: application,
creationTime:{
$gte: start_date.valueOf(),
$lte: end_date.valueOf()
}
},
{
_id: 1,
application: 1,
creationTime: 1,
buildSystem: 1,
}]
And then, passing each argument separately:
db.my_collection.find(query[0], query[1]).sort({ _id: -1 }).forEach(function(doc) {print(doc.testStatus)})
Or simply passing the query directly to the find method (w/o variables).