Saving & Fetching CloudKit References - swift

Question

I'm having trouble creating with CloudKit References. Data is being saved into CloudKit but its not referencing its parent (list). Don't know what i'm doing wrong, any help would be much appreciated!
Saving Method
var list: CKRecord?
var item: CKRecord?
#objc func save() {
let name = nameTextField.text! as NSString
//Fetch Private Database
let privateDatabase = CKContainer.default().privateCloudDatabase
if item == nil {
//Create Record
item = CKRecord(recordType: RecordTypeItems)
//Initialization Reference
guard let recordID = list?.recordID else { return }
let listReference = CKRecord.Reference(recordID: recordID, action: .deleteSelf)
item?.setObject(listReference, forKey: "list")
}
item?.setObject(name, forKey: "name")
//Save Record
privateDatabase.save(item!) { (record, error) in
DispatchQueue.main.sync {
self.processResponse(record: record, error: error)
}
}
}
Fetch Method
var list: CKRecord!
var items = [CKRecord]()
private func fetchItems() {
//Fetch Private Database
let privateDatabase = CKContainer.default().privateCloudDatabase
//Initialize Query
guard let recordID = list?.recordID else { return }
let reference = CKRecord.Reference(recordID: recordID, action: .deleteSelf)
let query = CKQuery(recordType: RecordTypeItems, predicate: NSPredicate(format: "list == %#", [reference]))
//Configure Query
query.sortDescriptors = [NSSortDescriptor(key: "name", ascending: true)]
//Peform Query
privateDatabase.perform(query, inZoneWith: nil) { (records, error) in
DispatchQueue.main.sync {
self.processResponseForQuery(records: records, error: error)
}
}
}

Answer 1

Where you are creating your query to retrieve items referencing the list, should the list reference in the predicate format string be inside an array? If you create the item's reference like item?.setObject(listReference, forKey: "list"), CloudKit will infer the list field to be a single CKRecord.Reference, so the query would be:
let query = CKQuery(recordType: RecordTypeItems, predicate: NSPredicate(format: "list == %#", reference))