Avoid inserting duplicates in Core Data

[melmoup]

Hi,
I'm using Core Data for caching in my app, I understood Core Data is not a database and I cannot enforce uniqueness of certain attributes to avoid duplicates.
So, what's the best way to avoid inserting an item already present? Is there some best practice? I think it's something quite common.
Thanks a lot in advance.

[BrianSlick]

Come up with some kind of search criteria. If you find a match, don't create the new item.

[melmoup]

Originally Posted by BrianSlick

Come up with some kind of search criteria. If you find a match, don't create the new item.

Thanks for replying, that would mean to check existence of an item with the sam id every time I insert a new one, isn't that too slow?

[BrianSlick]

1. Try it and find out

2. What makes you think that wouldn't be happening under whatever scheme you think should be there?