Re: Core Data Questions
Re: Core Data Questions
- Subject: Re: Core Data Questions
- From: "David Wilson" <email@hidden>
- Date: Fri, 6 Jun 2008 19:12:25 -0400
On Fri, Jun 6, 2008 at 6:59 PM, Gordon Apple <email@hidden> wrote:
> I'm currently trying to evaluate whether or not Core Data is a viable
> storage system in our application. Although I've been through the
> tutorials, Refs, and searches, I still have questions:
>
> 1. Our data hierarchy model does not seem to fit into the Core Data object
> model. (At least I haven't been able to make it fit so far). Now what?
> Redo the data model?
This seems unlikely. Can you provide some more information on your
model? You may simply be looking at Core Data the wrong way.
> 2. Most of our objects include dictionaries with highly variable content.
> Sometimes the object doesn't even know what has been stored in its
> dictionary. Is there anyway to implement this in core data? I suppose a
> one to many relationship could be used with an entity having a key/value
> pair, which leads me to #3.
Yes. You can easily have transient properties of any type that are
then serialized to/deserialized from a permanent attribute when
required.
>
> 3. If we implement a custom Attribute for NSValue (i.e., NSData), can we
> store variable length data simply by archiving it? Or does it have to be
> fixed length?
See #2. Our application has a number of objects which have all sorts
of strange attribute types (NSRects, NSDictionaries, etc). They just
need to be serialized/deserialized at the appropriate times.
--
- David T. Wilson
email@hidden
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