Re: IS-A relationships in core data
Re: IS-A relationships in core data
- Subject: Re: IS-A relationships in core data
- From: mmalc crawford <email@hidden>
- Date: Tue, 20 Nov 2007 10:10:17 -0800
On Nov 20, 2007, at 9:50 AM, Daniel Child wrote:
The fact that Core Data does NOT do this makes it hard to know
exactly how things are handled. Apparently, the relations are
handled using surrogate keys (as stated in the response by Melissa
Turner at Apple), but there is no option of whether or not to set
them. It is not clear to me how to define my key fields. Supposing,
for instance, I want two fields together to be the key field, is
there any way to do that?
Core Data defines its own primary keys. You cannot specify a primary
key (simple or compound) of your own.
mmalc
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