Re: CoreData: Can't modify an immutable model
Re: CoreData: Can't modify an immutable model
- Subject: Re: CoreData: Can't modify an immutable model
- From: "Sean McBride" <email@hidden>
- Date: Tue, 5 Feb 2008 17:04:53 -0500
- Organization: Rogue Research
On 2/5/08 1:50 PM, Ben Trumbull said:
>>No, or maybe only for a few microseconds. I was kind of confused by
>>this the first time that I used Core Data...
>> First, you "insert".
>> Then, you modify.
>>Seems backwards, but it works. You don't "create" a managed object.
>
>Yes. If you really want to, you can pass nil in for the
>NSManagedObjectContext* parameter, and call -insertObject: later.
>But there's a limit to how much you can do with a managed object if
>it is not registered with a context. For example, inverse
>relationship maintenance won't work so you can't set any
>relationships.
Ben,
Are you talking about insertNewObject
ForEntityForName:inManagedObjectContext: ? Do I understand correctly
that the moc parameter is in fact optional? The docs don't say so, but
I have always wished it was the case. Can you confirm? (I'd like to be
able to set some attributes before NSObjectControllers go changing the UI).
Thanks,
--
____________________________________________________________
Sean McBride, B. Eng email@hidden
Rogue Research www.rogue-research.com
Mac Software Developer Montréal, Québec, Canada
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