Removing a specific entry/row from Core-Data

Question

I'm using core data in my app, and i'm confused when it comes to removing certain rows or entries from the core data storage. I insert some products in to the storage like so:

NSManagedObject *Product = [NSEntityDescription insertNewObjectForEntityForName:@"Product" inManagedObjectContext:context];
[Product setValue:[NSNumber numberWithFloat:id] forKey:@"pid"];
[Product setValue:[NSNumber numberWithFloat:quantity] forKey:@"pquantity"];

This works fine for insertion. However, later in the app, I want to remove the entry where for example, the pid is 53. How would I go about removing only this row/entry? The equivalent SQL would be something like:

DELETE from Product WHERE pid = '53'

I would greatly appreciate some example code, as I can't seem to figure this one out.

Thanks for any help.

Removing a specific entry/row from Core-Data

8 Answers