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Log much-needed info when context fails to save

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* Makes it much easier to debug Core Data validation problems
  * Adapted from code by Chris Lozach
  * See: http://stackoverflow.com/questions/1283960/iphone-core-data-unresolved-error-while-saving
This commit is contained in:
Felix Holmgren
2011-10-12 21:04:57 +02:00
parent 991bd5c2c9
commit a235610ab4
1 changed files with 32 additions and 4 deletions
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36
Code/CoreData/RKManagedObjectStore.m
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@@ -119,17 +119,45 @@ static NSString* const RKManagedObjectStoreThreadDictionaryEntityCacheKey = @"RK
*/
- (NSError*)save {
NSManagedObjectContext* moc = [self managedObjectContext];
NSError *error = nil;
NSError *error;
@try {
if (![moc save:&error]) {
if (self.delegate != nil && [self.delegate respondsToSelector:@selector(managedObjectStore:didFailToSaveContext:error:exception:)]) {
[self.delegate managedObjectStore:self didFailToSaveContext:moc error:error exception:nil];
}
NSDictionary* userInfo = [NSDictionary dictionaryWithObject:error forKey:@"error"];
[[NSNotificationCenter defaultCenter] postNotificationName:RKManagedObjectStoreDidFailSaveNotification object:self userInfo:userInfo];
if ([[error domain] isEqualToString:@"NSCocoaErrorDomain"]) {
NSDictionary *userInfo = [error userInfo];
NSArray *errors = [userInfo valueForKey:@"NSDetailedErrors"];
if (errors) {
for (NSError *detailedError in errors) {
NSDictionary *subUserInfo = [detailedError userInfo];
RKLogError(@"Core Data Save Error\n \
NSLocalizedDescription:\t\t%@\n \
NSValidationErrorKey:\t\t\t%@\n \
NSValidationErrorPredicate:\t%@\n \
NSValidationErrorObject:\n%@\n",
[subUserInfo valueForKey:@"NSLocalizedDescription"],
[subUserInfo valueForKey:@"NSValidationErrorKey"],
[subUserInfo valueForKey:@"NSValidationErrorPredicate"],
[subUserInfo valueForKey:@"NSValidationErrorObject"]);
}
}
else {
RKLogError(@"Core Data Save Error\n \
NSLocalizedDescription:\t\t%@\n \
NSValidationErrorKey:\t\t\t%@\n \
NSValidationErrorPredicate:\t%@\n \
NSValidationErrorObject:\n%@\n",
[userInfo valueForKey:@"NSLocalizedDescription"],
[userInfo valueForKey:@"NSValidationErrorKey"],
[userInfo valueForKey:@"NSValidationErrorPredicate"],
[userInfo valueForKey:@"NSValidationErrorObject"]);
}
}
return error;
}
}