On May 17, 2008, at 3:00 PM, Keary Suska wrote:
on 5/17/08 10:27 AM, [EMAIL PROTECTED] purportedly said:
I'm trying to build a Core Data app for which some data is user-
provided and
some data is shipped with the program. Consider a travel itinerary
program
for instance where the user has a trip from airport A to airport B.
If the
program includes data about the airports themselves, that shouldn't
be
stored in the same storage as the user's flight numbers. One is
document
based and the other is shared across documents.
I understand the basic idea of using Fetched Properties and how to
create
them. What I'm not clear on is how to define a fetched property in
one store
against objects in another store, or how to tie multiple stores
together
into a context. Is there a good explanation or sample code for this
kind of
setup?
I don't believe there is any support for this, at least not
"automatically".
You would have to provide glue code for any interactions between
Managed
Object Contexts (MOCs), since each MOC is married to one storage.
This is not quite correct.
A MOC is associated with a persistent store coordinator. A PSC can
have multiple stores associated with it.
What you do not get for free is cross-store relationships.
Jim
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