CODEWITHSUNDEEP
iosobjective-cswiftcore-data
Joe Huang
Joe Huang

Reputation: 6570

In Core Data, how to do `if exists update else insert`?

How to do if exists update else insert in Core Data?

Do I need to program it step by step or there is actually an API for this?

Upvotes: 2

Views: 2980

Answers (1)

S. Karthik
S. Karthik

Reputation: 618

here is my code in objective c, you can use NSPredicate to check the item already exist,

NSFetchRequest *request = [[NSFetchRequest alloc] init];
      [request setEntity:[NSEntityDescription entityForName:@"Trend_news_table" inManagedObjectContext:managedObjectContext]];
      NSPredicate *predicate = [NSPredicate predicateWithFormat:[NSString stringWithFormat:@"news_id = %@",[user_info objectForKey:@"news_id"]]];
      [request setPredicate:predicate];

      NSError *error = nil;
      NSArray *results = [managedObjectContext executeFetchRequest:request error:&error];


      if (results.count > 0)
      {
            NSLog(@"update");
      }
      else
      {
          NSLog(@"Insert");
       }

Upvotes: 4

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