Re: Setting Core Data attribute values to related entity attribute values
Re: Setting Core Data attribute values to related entity attribute values
- Subject: Re: Setting Core Data attribute values to related entity attribute values
- From: "Hamish Allan" <email@hidden>
- Date: Wed, 16 Jul 2008 17:51:57 +0100
On Wed, Jul 16, 2008 at 5:12 PM, Jamie Phelps
<email@hidden> wrote:
> I have a Core Data entity in a Master-Detail view. In the detail view, I
> have a button that is bound to the createFoo: method of the selected object
> where Foo is the class name of the related entity. What I want to do is use
> this button to create a Foo and set its relationship programmatically.
That sort of code belongs in a controller -- the model knows nothing
about the selection.
> In my awakeFromInsert: method for the Foo class, I want to set attribute
> values based on the related entity. If it's null, I have some defaults, but
> if the relationship is present, I want to set some values equal to the
> corresponding attribute in the related entity as defaults.
Do you really have to duplicate the information? It'll make your life
harder if any of it changes...
Hamish
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