How to receive String Array from Parse Cloud Code in Swift? - ios

Question

I've written a Parse cloud code function which returns some data from the database. I see those in the "response" when I do a println in XCode. It looks like it's wrapped in a double optional!?
What I'm making wrong in the if let and in the for loop? How do I get (unwrap) a String Array out of it?
My code in Swift:
PFCloud.callFunctionInBackground("TopTwo", withParameters: ["rating":5]) {
(response: AnyObject?, error: NSError?) -> Void in
if error == nil {
println("Successfully retrieved \(response!.count) scores.")
println("Here are the flower names: \(response)")
if let objects = response as? [PFObject] {
for object in objects {
println(object.objectId)
}
}
} else {
println("Error: \(error!) \(error!.userInfo!)")
}
}
What I see in the console:
Successfully retrieved 2 scores.
Here are the flower names: Optional((
rose,
"sunflower"
))
Maybe there is also an error in my cloude code. Here you can see what I've done:
Parse.Cloud.define("TopTwo", function(request, response) {
var query = new Parse.Query("Flowers");
console.error("Get flowers with the rating: " + request.params.rating);
query.equalTo("stars", request.params.rating);
query.find({
success: function(results) {
console.error("Results: " + results);
var list = [];
for (i = 0; i < results.length; i++) {
list[i] = results[i].get('flowerName');
}
console.error("Flower name list: " + list);
response.success(list);
},
error: function() {
response.error("lookup failed");
}
});
});
And here the parse logs:
Results: [object Object],[object Object]
Flower name list: rose,sunflower
(I'm using XCode 6.3.2 - Swift 1.2)
Many thanks in advance!

Answer 1

Okay, I could solve it on my own.
The object which is returned from cloud code is already an Array. Therefore a casting into NSArray has to be made instead of a casting into [PFObject].
Here is the working Swift code:
PFCloud.callFunctionInBackground("dayTopFive", withParameters: ["day":1]) {
(response: AnyObject?, error: NSError?) -> Void in
if error == nil {
println("Successfully retrieved \(response!.count) scores.")
// This is working:
let objects = response as! NSArray
for object in objects {
println("A top flower is: \(object)")
}
}
}