Re: CORE DATA: derived values from several entities and managed object instances ??
Re: CORE DATA: derived values from several entities and managed object instances ??
- Subject: Re: CORE DATA: derived values from several entities and managed object instances ??
- From: dan pahlajani <email@hidden>
- Date: Wed, 18 Jan 2006 14:54:11 -0800
Yes, i have read ALL the documentation. Also if you are refering to the
FAQ # 2, it shows how to access to-many related objects as "set" and
not as an array. I am interested in accessing array.
-Thanks,
--Dan
On 1/18/06, R. Matthew Emerson <email@hidden> wrote:
>
>
> On Jan 18, 2006, at 4:56 PM, dan pahlajani wrote:
>
> > Several of the managed objects in my app have derived values (values
> > calculated from other attributes) just like a fullName being driven
> > from
> > first and last names.
> >
> > However, many a times the derived value is calculated using the
> > attributes
> > of several entities AND many a times the derived values is
> > calculated using
> > same attribute of an entity but from a set of managed object
> > instances of
> > the entity.
>
> Have you seen the following link?
>
> http://developer.apple.com/documentation/Cocoa/Conceptual/CoreData/
> Articles/cdFAQ.html#//apple_ref/doc/uid/TP40001802-DontLinkElementID_13
>
> While registering to receive change notifications from the MOC may
> get you more information than you would really like to see, if your
> managed objects are not changing too frequently, this may be a
> workable way of keeping your derived values up-to-date.
>
>
>
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