core data database is empty test

Question

How can I test if the core data database is empty? I tried:

NSIndexPath *path1 = [NSIndexPath indexPathForRow:0 inSection:0];
NSManagedObject *managedObject          


        

Answer 1

I have these two methods implemented in my appDelegate:

- (NSString *)applicationDocumentsDirectory 

{
    
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    
    NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
    
    return basePath;
    
}

    - (NSPersistentStoreCoordinator *)persistentStoreCoordinator 
    
    {
        
        if (persistentStoreCoordinator != nil) 
    
            return persistentStoreCoordinator;
        
        NSURL *storeUrl = [NSURL fileURLWithPath: [[self applicationDocumentsDirectory] stringByAppendingPathComponent: @"YourApp.sqlite"]];

        NSLog(@"storeURL: %@", storeUrl);
                
        NSError *error;
        
        persistentStoreCoordinator = [[NSPersistentStoreCoordinator alloc] initWithManagedObjectModel: [self managedObjectModel]];
        
        NSDictionary * options = [NSDictionary dictionaryWithObjectsAndKeys:  
        
                                 [NSNumber numberWithBool:YES], NSMigratePersistentStoresAutomaticallyOption,  
                                 
                                 [NSNumber numberWithBool:YES], NSInferMappingModelAutomaticallyOption, nil];  
        
        if (![persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeUrl options:options error:&error]) 
        
        {
            
            /* 
            Replace this implementation with code to handle the error appropriately. 
      
            abort() causes the application to generate a crash log and terminate. You should not use this function in a shipping application, although it may be 
                    useful during development. If it is not possible to recover from the error, display an alert panel that instructs the user to quit the application by pressing the Home button. 
      
            Typical reasons for an error here include: 
            * The persistent store is not accessible 
            * The schema for the persistent store is incompatible with current managed object model 
            Check the error message to determine what the actual problem was. 
            */
            
        
        }// if    
        
        return persistentStoreCoordinator;
    }

The storeUrl prints the path to the sqlite database.

If you open this path with a sqlite manager, you're able to see the content of your sql database. I use this SQLite Manager to analyze sqlite databases: SQLite Manager

(You can only use this method on the simulator)