Is there any way we can restrict duplicate entries in core data?

Question

I have been trying to add objects in core data. So, i want that it should not allow duplicate entries in core data store. How to do that? This is my code related to save data.

Answer 1

no, coredata has no built-in in uniquing as it isn't a DB.

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you have to assure uniqueness in your program logic.

e.g. often, one does a fetch for an entry that should be unique and if that fetch has 1 entry, don't add another, else add it!

==> this works well for serial CD access, but can get complicated with multiple contexts that run in a multithreaded env