Entity is not key value coding-compliant for the key

Question

    if (win) {
    // Game was won, set completed in puzzle and time
    // Calculate seconds taken
    int timeTaken = (int)([NSDate timeIntervalSinceReferenceDate]         


        

Answer 1

If parsing JSON into a managed object, be sure you're using the coreDataPropertyName property rather than the json-key-name key from JSON. Easy to mix up when they're named so similarly.

This error was driving me nuts, and all because I was using image-url rather than imageURL.