CoreData predicate programming
CoreData predicate programming
- Subject: CoreData predicate programming
- From: Steve Israelson <email@hidden>
- Date: Wed, 27 Jun 2007 16:30:09 -0700
I have been looking at this and other docs:
http://developer.apple.com/documentation/Cocoa/Conceptual/Predicates/
Articles/pSyntax.html
I have a "Item" entity that has a to many relationship for its
"usages" relationship.
The usage contains a list of "Usage" entities with a "kind" integer
attribute.
So, say I want all the items with a usage of 1, I can use this
predicate:
ANY usages.kind = 1
What I want to do is find all the "Item" entities that have a usage
of more than one kind, like say 1, 2 AND 3.
I could do this I think:
ANY usages.kind = 1 AND ANY usages.kind = 2 AND ANY usages.kind = 3
I would like a more general way that I can add into the string a list
of usage kinds that ALL must be present for that item to be returned.
Any tips?
I suppose one day I would want one as well where any one usage type
could be present too.
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