Re: Document style programming
Re: Document style programming
- Subject: Re: Document style programming
- From: Luther Baker <email@hidden>
- Date: Sat, 18 Oct 2014 11:09:34 -0500
Thanks Mike.
Let me ask another question ... what if I need to create a temporary,
thread specific NSManagedObjectContext? Let's say I'm interacting with a
RESTful API ala AFNetworking and I need to parse and save data on a
background response thread.
How do I tie my thread specific context into the Document's datastore?
Thanks,
-Luther
On Sat, Oct 18, 2014 at 11:03 AM, Mike Abdullah <email@hidden>
wrote:
> When using NSPersistentDocument it takes over responsibility for saving
> the context. You should not save the context yourself.
>
> > On 18 Oct 2014, at 17:00, Luther Baker <email@hidden> wrote:
> >
> > Hi,
> >
> > I am creating a Desktop issue tracking app using core data and the
> > NSDocument framework - so yes, the Xcode wizard extended
> > NSPersistentDocument which provides me with an NSManagedObjectContext.
> >
> > My question is - if I start working in the app, creating issues for
> > instance ... when I go to actually persist the context I get an error
> "This
> > NSPersistentStoreCoordinator has no persistent stores. It cannot
> perform a
> > save operation."
> >
> > So, does this imply that for NSDocument style programming, most folks
> > aren't 'saving' their context right away? Do we wait for the user to
> > actually save the document the first time? IE: there is not in memory
> store
> > that the Document manages until the user formally saves to the file
> system?
> >
> > And does it follow then that on subsequent changes, we formally persist
> the
> > context only when the user actually 'Saves'?
> >
> > Does anyone force the user to 'find' a file location right away, upon
> > opening a new document, and then persist everything happily in the
> > background?
> >
> > I tend to this this is really just a Desktop paradigm question more than
> > anything else.
>
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