There seems to be a very weird bug in my app in which I'm using Core Data.
I handled everything required already, and it was working for like past recent weeks.
I closed the project yesterday, and started development today ( with no modifications in code ) and now every time I wanna add a row to my database, I get an exception saying the following class is not a subclass of NSManagedObject, which I'm ridiculously sure is not true, first because it was working for days, and second because I generated them automatically as NSManagedObject subclasses. I tried regenerating classes using Editor->Create NSManagedObject Subclasses in my data model, but it didn't help me at all.
It's really weird that I get this exception out of blue and all of a sudden WITHOUT EVEN A LINE OF MODIFICATION in my code :(
Anybody got any idea ? I really appreciate any help. Thanks
BTW, Here're some code that may help :
The Error :
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: '"Message" is not a subclass of NSManagedObject.
Message Class Header File (Auto-Generated) :
#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>
@class File;
@interface Message : NSManagedObject
@property (nonatomic, retain) NSString * data;
@property (nonatomic, retain) NSDate * date;
@property (nonatomic, retain) NSString * fileId;
@property (nonatomic, retain) NSString * number;
@property (nonatomic, retain) NSString * status;
@property (nonatomic, retain) NSString * type;
@property (nonatomic, retain) NSString * xmppId;
@property (nonatomic, retain) File *contains;
@end
The method in which I try to create a new message object :
+ (void)sendXMPPMessage:(NSString *)messageStr containingFile:(NSData *)fileData toNumber:(NSString *)number
{
if(fileData == nil)
{
NSString *newID = [self generateNewXMPPMessageID];
SunBirdAppDelegate *appDelegate = (SunBirdAppDelegate *)[[UIApplication sharedApplication] delegate];
[appDelegate sendXMPPMessage:messageStr withID:newID toNumber:number];
NSMutableDictionary *messageDataDic = [[NSMutableDictionary alloc] init];
[messageDataDic setObject:messageStr forKey:@"body"];
[messageDataDic setObject:@"Outgoing" forKey:@"type"];
[messageDataDic setObject:newID forKey:@"xmppId"];
[messageDataDic setObject:@"Sending" forKey:@"status"];
[messageDataDic setObject:[NSDate date] forKey:@"date"];
[messageDataDic setObject:number forKey:@"number"];
[Message messageWithMessageInfo:messageDataDic inManagedObjectContext:[appDelegate managedObjectContext]];
}
else
{
//Handle Database With File Data
}
}
Creating a New Message Object -> The Create Category On Message Class (Message+Create.m) :
+ (Message *)messageWithMessageInfo:(NSDictionary *)messageInfo inManagedObjectContext:(NSManagedObjectContext *)context
{
SunBirdAppDelegate *appDelegate = (SunBirdAppDelegate *)[[UIApplication sharedApplication] delegate];
Message *newMessage = nil;
NSFetchRequest *request = [NSFetchRequest fetchRequestWithEntityName:@"Message"];
request.predicate = [NSPredicate predicateWithFormat:@"xmppId = %@", [messageInfo objectForKey:@"msgId"]];
NSSortDescriptor *sortDescriptor = [NSSortDescriptor sortDescriptorWithKey:@"xmppId" ascending:YES];
request.sortDescriptors = [NSArray arrayWithObject:sortDescriptor];
NSError *error = nil;
NSArray *matches = [context executeFetchRequest:request error:&error];
if (!matches || ([matches count] > 1))
{
// handle error
}
else if ([matches count] == 0)
{
newMessage = [NSEntityDescription insertNewObjectForEntityForName:@"Message" inManagedObjectContext:context];
newMessage.data = [messageInfo objectForKey:@"body"];
newMessage.type = [messageInfo objectForKey:@"type"];
newMessage.date = [messageInfo objectForKey:@"date"];
newMessage.xmppId = [messageInfo objectForKey:@"xmppId"];
newMessage.status = [messageInfo objectForKey:@"status"];
newMessage.number = [messageInfo objectForKey:@"number"];
if ( [[messageInfo allKeys] containsObject:@"fileId"] )
{
newMessage.fileId = [messageInfo objectForKey:@"fileId"];
newMessage.contains = [messageInfo objectForKey:@"fileData"];
}
else
{
newMessage.fileId = NULL;
newMessage.contains = NULL;
}
}
else
{
newMessage = [matches lastObject];
NSLog(@"WARNING : NO NEW MESSAGE STORED IN DB ! MESSAGE WITH SAME XMPPID RETURNED");
}
[appDelegate saveContext];
return newMessage;
}
And this is the line on which I'm being informed Message is not a subclass of NSManagedObject :
newMessage = [NSEntityDescription insertNewObjectForEntityForName:@"Message" inManagedObjectContext:context];
