You are encountering an ambiguous type error in your CloudKitManager.swift file, specifically with the message “Type of expression is ambiguous without a type annotation.” This error arises when the Swift compiler cannot infer the type of a variable or expression. In your case, it relates to the matchResults variable when unpacking the result from the fetch(withQuery:) method. The compiler requires explicit type information to understand what matchResults contains.
Additionally, you may see an error indicating “Invalid redeclaration of ‘PomodoroSession'” or similar messages. This suggests that there might be multiple declarations of the PomodoroSession type in your project. It is essential to ensure that PomodoroSession is defined only once, typically in PomodoroSession.swift. If it is declared elsewhere, it can lead to ambiguity.
Another potential issue is related to fetching records, where you might encounter an error stating “Value of type ‘Result<…>’ has no member ‘compactMap’.” This indicates that you are trying to call compactMap on a type that doesn’t support it. When fetching records from CloudKit, it is crucial to handle the result type correctly. You need to ensure that you unpack the result properly to access the records.
When discussing these issues with a professional, you might ask them how to explicitly define types in Swift to avoid ambiguity, especially when unpacking tuples from result types. You could also inquire about the best practices for handling the result of a CloudKit fetch operation in Swift, particularly when dealing with complex types. Lastly, you may want to ask how to ensure that types like PomodoroSession are declared only once in your project to avoid redeclaration errors.

This is my code:

func fetchSessions(completion: @escaping ([PomodoroSession]) -> Void) {
        let predicate = NSPredicate(value: true)
        let query = CKQuery(recordType: "PomodoroSession", predicate: predicate)
        
        container.privateCloudDatabase.fetch(withQuery: query) { result in
            switch result {
            case .success(let (matchResults, _)): // Unpack the tuple
                let sessions: [PomodoroSession] = matchResults.compactMap { recordResult -> PomodoroSession? in
                    switch recordResult {
                    case .success(let record):
                        guard let date = record.value(forKey: "date") as? Date,
                              let completedPomodoros = record.value(forKey: "completedPomodoros") as? Int else {
                            return nil
                        }
                        return PomodoroSession(date: date, completedPomodoros: completedPomodoros)
                    case .failure(let error):
                        print("Error fetching record: (error.localizedDescription)")
                        return nil
                    }
                }
                DispatchQueue.main.async {
                    completion(sessions)
                }
            case .failure(let error):
                DispatchQueue.main.async {
                    self.error = "Failed to fetch sessions: (error.localizedDescription)"
                    completion([])
                }
            }
        }
    }