I figured out my problem. There is, in fact, support in
NSPersistentDocument for Core Data. I'd like to replicate that support
in my prefs pane class. The managedObjectModel: getter talks about
how, by default, "the Core Data framework creates a merged model from
all models in the application bundle." How can I just get at this
model and return it? Perhaps I don't even need to implement this, just
something that creates a managedObjectContext?
TIA,
Rick
On Mar 28, 2008, at 1:18 PM, Rick Mann wrote:
I didn't get any responses, so I'm trying again.
I'm clearly missing some link in the whole Core Data thing. I'm
trying to use it in a Prefs Pane. I've written no code, just set
things up with the data model editor and IB. Is there something
NSDocument does to support Core Data that an NSPrefsPane wouldn't do
by default?
Basically, when I click my "add" button, although it's wired to
NSArrayController's add: action, it doesn't seem to actually add
anything. I get "3/28/08 1:17:58 PM System Preferences[7428] Cannot
perform operation without a managed object context". I think I get
what that's telling me, but how do I set one up?
In the tutorial, it seemed to "just work," and I didn't set anything
up explicitly. Thanks!
----------------------------
Original message:
I'm trying to use what I learned yesterday about Core Data in a
System Prefs pane. I created an Entity data model, and then tried to
add an NSTable and some buttons and wire them up the same way I'd
seen the Core Data Entity tool do it in IB. But, it didn't work.
So I tried using the Core Data Entity tool to let IB do it, and it
disables the Add and Remove buttons.
The only difference I can spot is in yesterday's project, the File's
Owner is an NSDocument. Today, it's a PrefsPane.
Is it possible to use this stuff in a prefs pane? What am I missing?
Thanks!
--
Rick
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--
Rick
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