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iOS

Posted by Sinan the Thinker
Sinan the Thinker
7,980 Points

How to create a sequence number as column in Parse.com

Hi guys,

I want to add a column as sequence number in my back end of Parse.com which starts 1. Each object gets an incremented sequence number.

PFObject *onderdeelAanvraag = [PFObject objectWithClassName:@"Aanvragen"];
        [onderdeelAanvraag setObject:[PFUser currentUser] forKey:@"Aanvrager"];
        onderdeelAanvraag[@"OnderdeelOmschrijving"] = onderdeelOmschrijving;
        onderdeelAanvraag[@"AutoOmschrijving"] = autoOmschrijving;
        NSDate *date = [NSDate date];
        onderdeelAanvraag[@"Datum"] =date;


        onderdeelAanvraag[@"sequenceNumber"]= *continuous number which starts at 1*

        [onderdeelAanvraag saveInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
            if (error) {
                UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Sorry!" message:[error.userInfo objectForKey:@"error"] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
                [alertView show];
            }
            else {
                [self.navigationController popToRootViewControllerAnimated:YES];
            }
        }];

1 Answer

Dennis Walsh
Dennis Walsh
5,793 Points
Dennis Walsh
Dennis Walsh
5,793 Points

Sinan,

Are you sure you really want/need to do that? Each object has a unique id already and Parse provides createdAt and updatedAt fields with each object. If you want to create an index you can do that by adding a new field in Parse of type Number and then update it with each object creation. However, keep in mind you will have to manage the storage and retreival of this item between application launches.