CKQuery with Todays Date - cloudkit

Question

Would really value some support.
I am designing an tvOS app which displays certain CloudKit content in a tableView, the data is different depending on the current date.
Each calendar date correspondents to the data within that Type.
e.g. RecordType "A13032019" relates to 13th March 2019.
I generate the date in the correct format using a func fired within ViewDidLoad (generateDate():
*
func generateDate() {
let formatter = DateFormatter()
//2016-12-08 03:37:22 +0000
formatter.dateFormat = "ddMMyyyy"
let now = Date()
let dateString = formatter.string(from:now)
NSLog("%#", dateString)
let generateOperationalDate = ("A\(dateString)")
print(generateOperationalDate)
}
I then try to use generateOperationalData to run in the below CKQuery:
func queryDatabase() {
let query = CKQuery(recordType: "\(generateDate())", predicate: NSPredicate(format: "TRUEPREDICATE", argumentArray: nil))
let sort = NSSortDescriptor(key: "trainDepartureTime", ascending: true)
query.sortDescriptors = [sort]
database.perform(query, inZoneWith: nil) { (records, _) in
guard let records = records else { return }
let sortedRecords = records
When I try to run this it throws a Thread Error with reason "* Terminating app due to uncaught exception 'CKException', reason: 'recordType can not be empty'
* "
So it appears to me that the queryDatabase function is running before the generateDate function, however I have tried delaying the queryDatabase function and this still throws the same error!
Is there anyway I can generate the date (via generateDate) before the queryDatabase function runs?
Thanks

Answer 1

You want to write generateDate() so it returns a String. Then, inside queryDatabase(), call generateDate() so you're guaranteed to have a value to pass to "recordType".
I also condensed the calls a little bit. Hope this helps.
func generateDate() -> String {
let formatter = DateFormatter()
formatter.dateFormat = "ddMMyyyy"
let dateString = formatter.string(from:Date())
return "A\(dateString)"
}
func queryDatabase() {
// this will make sure you have a String value
let type = generateDate()
// now you can pass it
let query = CKQuery(recordType: type, predicate: NSPredicate(value: true))
//...
}