setIdentificationAttributes :- Date property

[hitendradeveloper]

Hi I want to set the timestamp attribute of my message object as IdentificationAttributes.

I tried as below, before I was using the messageID as the identification attribute and it was working. but now I want to use the timestamp as identification.

+ (nonnull RKEntityMapping *)mappingInManagedObjectStore:(nonnull RKManagedObjectStore *)managedObjectStore
{
	// Defines mapping for C8UserBrief
	RKEntityMapping *mapping = [RKEntityMapping mappingForEntityForName:C8EntityNameForChatMessage
												   inManagedObjectStore:managedObjectStore];

    [mapping setIdentificationAttributes:@[@"xmppMessageID"]];


    
	[mapping addAttributeMappingsFromDictionary:@{
                                                  @"id" : @"messageID",
                                                  @"xmpp_message_ID" : @"xmppMessageID",
			@"timestamp" : @"timestamp",
			@"sender_id" : @"senderID",
			@"message" : @"message",
			@"media_id" : @"mediaID",
			@"trip_id" : @"tripID",
            @"type" : @"type",
            @"start_date":@"startDate",
            @"end_date":@"finishDate"}];


	// Adds nested objects
	[mapping addConnectionForRelationship:@"sender" connectedBy:@{@"senderID" : @"userID"}];
	[mapping addConnectionForRelationship:@"media" connectedBy:@{@"mediaID" : @"mediaID"}];
	[mapping addConnectionForRelationship:@"trip" connectedBy:@{@"tripID" : @"tripID"}];

	return mapping;
}

Below is my code which saves the object manually when I am calling from XMPP delegate.

+(C8ChatMessage *)saveC8ChatMessageFrom:(XMPPMessage *)xmppMessage {
    
    //[self testMappingStringIdentificationAttributesFromElementsOnAnArrayDoesNotDuplicateManagedObjects];
    
    
    
    NSManagedObjectContext *privateContext = [[[RKObjectManager sharedManager] managedObjectStore] mainQueueManagedObjectContext];
    
    id<RKManagedObjectCaching> managedObjectCache = [[[RKObjectManager sharedManager] managedObjectStore] managedObjectCache];
    
    NSLog(@"\n\nSaving received xmppMessage-C8ChatMessage := %@\n",xmppMessage);
    C8ChatMessage *message;{
        NSArray *fetchedObjects;
        
        NSFetchRequest *fetch = [[NSFetchRequest alloc] init];
        NSEntityDescription *entityDescription = [NSEntityDescription entityForName:C8EntityNameForChatMessage  inManagedObjectContext: privateContext];
        [fetch setEntity:entityDescription];
        [fetch setPredicate:[NSPredicate predicateWithFormat:@"(xmppMessageID == %@)",message.senderID]];
        NSError * error = nil;
        fetchedObjects = [privateContext executeFetchRequest:fetch error:&error];
        if([fetchedObjects count] == 1){
            message = [fetchedObjects objectAtIndex:0];
        }else{
            message = (C8ChatMessage *)[NSEntityDescription
                                        insertNewObjectForEntityForName:C8EntityNameForChatMessage
                                        inManagedObjectContext:privateContext];
        }
    }
    
    
    message.messageID = [xmppMessage attributeNumberInt64ValueForName:@"id"];
    message.xmppMessageID = [xmppMessage attributeStringValueForName:@"xmpp_message_ID"];    
    
    message.timestamp = [NSDate dateWithTimeIntervalSince1970:
                         [xmppMessage attributeDoubleValueForName:@"timestamp"]
                         ];
    
    NSLog(@"Received timeStamp:= %@",[xmppMessage attributeNumberDoubleValueForName:@"timestamp"]);
    NSLog(@"Received xmppMessageID:= %@",[xmppMessage attributeStringValueForName:@"xmpp_message_ID"]);
    
    message.senderID = [xmppMessage attributeNumberInt64ValueForName:@"sender_id"];
    
    NSString *messageStr = [xmppMessage attributeStringValueForName:@"message"];
    message.message = [NSString stringWithFormat:@"%@ from xmpp",messageStr];
    
    message.mediaID = [xmppMessage attributeNumberInt64ValueForName:@"media_id"];
    message.tripID = [xmppMessage attributeNumberInt64ValueForName:@"trip_id"];
    message.type = [xmppMessage attributeNumberIntValueForName:@"c8_type"];
    
    message.startDate = [NSDate dateWithTimeIntervalSince1970:
                         [xmppMessage attributeNumberFloatValueForName:@"start_date"].doubleValue
                         ];
    message.finishDate = [NSDate dateWithTimeIntervalSince1970:
                         [xmppMessage attributeNumberFloatValueForName:@"end_date"].doubleValue
                         ];
    
    
    C8MediaDescription *mediaDescription;
    if([C8MediaDescription isValid:xmppMessage]){
        mediaDescription = [C8MediaDescription getC8MediaDescriptionFrom:xmppMessage];
        [managedObjectCache didCreateObject:mediaDescription];
    }
    
    C8TripData *trip;{
        NSArray *fetchedObjects;
        
        NSFetchRequest *fetch = [[NSFetchRequest alloc] init];
        NSEntityDescription *entityDescription = [NSEntityDescription entityForName:C8EntityNameForTripData  inManagedObjectContext: privateContext];
        [fetch setEntity:entityDescription];
        [fetch setPredicate:[NSPredicate predicateWithFormat:@"(tripID == %@)",message.tripID]];
        NSError * error = nil;
        fetchedObjects = [privateContext executeFetchRequest:fetch error:&error];
        if([fetchedObjects count] == 1){
            trip = [fetchedObjects objectAtIndex:0];
            [managedObjectCache didFetchObject:trip];
        }
    }
    
    C8UserBrief *user;{
        NSArray *fetchedObjects;
        
        NSFetchRequest *fetch = [[NSFetchRequest alloc] init];
        NSEntityDescription *entityDescription = [NSEntityDescription entityForName:C8EntityNameForUserBrief  inManagedObjectContext: privateContext];
        [fetch setEntity:entityDescription];
        [fetch setPredicate:[NSPredicate predicateWithFormat:@"(userID == %@)",message.senderID]];
        NSError * error = nil;
        fetchedObjects = [privateContext executeFetchRequest:fetch error:&error];
        if([fetchedObjects count] == 1){
            user = [fetchedObjects objectAtIndex:0];
            [managedObjectCache didFetchObject:user];
        }
        
    }
    
    //C8ChatMessage Relationship
    message.trip = trip;
    message.sender = user;
    
    //C8MediaDescription Relationship
    if (mediaDescription){
        if(trip){
            [mediaDescription addTripsObject:trip];
        }
        mediaDescription.messages = message;
    }
    
    [managedObjectCache didCreateObject:message];
    [privateContext saveToPersistentStore:nil];
//    [managedObjectCache didFetchObject:message];
    
    NSString *strTripJIDKey = [NSString stringWithFormat:@"lastclear%@",[message.trip jid]];
    NSData *date = (NSData *)[NSDate date];
    XSET_OBJECT(strTripJIDKey, date)
    
    return message;
}

Any help is appreciated.