Re: Parent entities
Re: Parent entities
- Subject: Re: Parent entities
- From: Michael McCracken <email@hidden>
- Date: Thu, 23 Jun 2005 18:23:45 -0700
On 6/23/05, Dave Hayden <email@hidden> wrote:
> First, is there a CoreData mailing list where I should be posting
> this instead? I saw nothing at lists.apple.com..
>
> I can't find anything useful in the documentation about parent
> entities, only that you can set them in the object modeller, and..
> well, yeah.
>
> I'm guessing that the child entity inherits its parent entity's
> properties; however, I don't get these in the predicate builder when
> I target the child entity. Setting and getting in code seems to work
> as I expect, though. Is this an XCode bug or am I not grasping
> something here?
>
> Is there a way to check the entity in a fetched property? For
> example, if I have an entity with a to-many relationship to "Fruit"
> types and "Apple" is a child entity, can I sort out which items in
> the relationship are Apples?
I think you can do this with a predicate like this:
entity.name == "Apple".
In my experience, managed-object instances of child entities
have the child entity's NSEntityDescription.
-mike
--
Michael McCracken
UCSD CSE PhD Student
San Diego Supercomputer Center
http://www.cse.ucsd.edu/~mmccrack/
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