... "Copy" Managed Object in Core Data ...
... "Copy" Managed Object in Core Data ...
- Subject: ... "Copy" Managed Object in Core Data ...
- From: Peter Sampson <email@hidden>
- Date: Sat, 26 Nov 2005 21:15:23 -1000
Hello Everyone,
I've been lurking and learning from this list for a long time, and I
feel indebted to you all who have contributed so much! Thanks.
Regarding accessing properties in Core Data:
I have two Entities in a tools lending library application: tools
and loanout.
The tools entity contains a toolname, code, and tooldescription
property.
The loanout entity has a toolname, code, and tooldescription and
daysout property.
Basically, I want to input a code in the loanout entity, and it will
lookup the toolname and tooldescription from the "tools" entity and
COPY that data into the "loanout" entity. (It can't be fetched or a
basic relationship value, because once the data is copied, it should
remain permanent. ie. if I change the screwdriver to a hammer in the
tools entity, it should not change all other screwdrivers in loanout.
Neither should it delete them.)
I've tried doing it via model key path in bindings, and no luck.
Also, how do you have the related data copied -- once the tools code
is entered, it copies the data from the tool entity and places it in
loanout.
Can you do this in the bindings palette, or does it require setting
the value with a valueforkey: invocation?
Cheers,
Peter
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