Re: Core Data capabilities questions
Re: Core Data capabilities questions
- Subject: Re: Core Data capabilities questions
- From: mmalc Crawford <email@hidden>
- Date: Sun, 21 Jun 2009 14:22:00 -0700
On Jun 21, 2009, at 2:04 PM, Kyle Sluder wrote:
Is it possible (or does Core Data automatically do this) for
attributes that
aren't accessed to not actually load? For example, my entities have a
"description" attributes that is rarely accessed. Will Core Data
defer
loading the data for that attribute until it's actually requested?
No. The behavior you're describing is known as "faulting." Core Data
only faults objects, not attributes.
This is not the case with iPhone OS -- see NSFetchRequest's
setPropertiesToFetch:
<http://developer.apple.com/iphone/library/documentation/Cocoa/Reference/CoreDataFramework/Classes/NSFetchRequest_Class/NSFetchRequest.html#//apple_ref/occ/instm/NSFetchRequest/setPropertiesToFetch:
>
You can specify a subset of properties to fetch in the initial
request. If you request others at a later stage, the remainder of the
object's data will be faulted in.
mmalc
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