Question

I’m using Magical Record library. Its cool but I have some trouble.
My second method return incorrect data. First and second methods must return the same quantity of quotes. Does findAllWithPredicate work properly?

UNLOCK AND FETCH QUOTES

-(NSArray*) unlockAndFetchQuotes
{
 CoreDataManager *instance = [CoreDataManager instance];
 [instance unlockUnitNumber:1];
 return [instance fetchQuotes];
}

UNLOCK UNIT NUMBER

-(void) unlockUnitNumber:(int) number
{
 NSPredicate *predicate = [NSPredicate predicateWithFormat:@"identificator=%d", number];
 NSArray *array =[CDInApp findAllWithPredicate:predicate];
 if (array.count>0)
 {
    CDInApp *inApp = [array objectAtIndex:0];
    inApp.isLockedValue = NO;
    [[NSManagedObjectContext defaultContext] saveNestedContexts];
 }
}

FETCH QUOTES

-(NSArray*) fetchQuotes
{
 int z=0;
 NSArray *arr = [CDQuotes findAll];
 for (CDQuotes * quotes in arr)
 {
    if (!quotes.inApp.isLockedValue)
    {
        z++;
    }
 }
   NSLog(@"_____ unlocked quotes by first method %d", z);


 NSPredicate *predicate = [NSPredicate predicateWithFormat:@"inApp.isLocked != 1"];
 int count = [CDQuotes countOfEntitiesWithPredicate:predicate];
   NSLog(@"_____ unlocked quotes by second method %d", count);

 NSArray *array = [CDQuotes findAllWithPredicate:predicate];
   NSLog(@"total unlocked array %d", array.count);

 return array;
}

First and second methods must return the same quantity of quotes. The second method doesn’t work properly.

My output

___ must be unlocked quotes 500
___ unlocked quotes by first method 500
___ unlocked quotes by second method 250
total unlocked array 250

UPDATE2

I found a problem. Firstly I do unlockAndFetchQuotes. I trace this function and found something strange. Saving to coredata goes after fetching quotes. Now I’m looking for soluions to save instantely.

2012-12-21 18:13:32.992 CoreBug[6713:11603] _____ unlocked quotes by first method 8
2012-12-21 18:13:32.994 CoreBug[6713:11603] _____ unlocked quotes by second method 6
2012-12-21 18:13:32.996 CoreBug[6713:11603] -[NSManagedObjectContext(MagicalSaves) MR_saveWithErrorCallback:](0x7464700) -> Saving <NSManagedObjectContext (0x7464700): *** DEFAULT ***> on *** MAIN THREAD ***
2012-12-21 18:13:32.997 CoreBug[6713:15603] -[NSManagedObjectContext(MagicalSaves) MR_saveWithErrorCallback:](0x8148ef0) -> Saving <NSManagedObjectContext (0x8148ef0): *** BACKGROUND SAVING (ROOT) ***> on *** BACKGROUND THREAD ***

I unlocked my unit and fetched quotes.

Answer 1

saveNestedContexts is async method. I need to use another method

[localContext MR_saveNestedContextsErrorHandler:nil completion:^{
        [self fetchQuotes];
    }];