Re: Cocoa-dev Digest, Vol 3, Issue 108
Re: Cocoa-dev Digest, Vol 3, Issue 108
- Subject: Re: Cocoa-dev Digest, Vol 3, Issue 108
- From: Ron Lue-Sang <email@hidden>
- Date: Tue, 24 Jan 2006 14:25:54 -0800
It looks like you're expecting awakeFromInsert to be called when you
fetch an object (that's really what you're doing by calling
objectWithID:).
awakeFromInsert will get called on the object exactly once in it's
lifetime - the first time it's inserted into a context. After that,
awakeFromFetch will be called on the object when it's fetched into a
context (or, if it's refaulted, when the fault is fired ). So, if
understand you correctly, this is the hook you're actually looking for.
-----------------------------
Ronzilla
Core Bindings/Cocoa Data
On Jan 23, 2006, at 10:41 PM, email@hidden wrote:
Date: Tue, 24 Jan 2006 05:04:27 +0200
From: "Rimas M." <email@hidden>
Subject: Core Data + MultiThreading
To: Cocoa-Dev Mail <email@hidden>
Message-ID: <email@hidden>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Hello,
I have got lots of troubles by trying to solve this question. How to
correctly implement multithreading in Core-Data app. I have found
some examples at ADC, and decided to use multiple NSManagedContexts
(each thread has its own context) controlled by ONE
NSPersistanceStoreCoordinator, and locking contexts. Is that a good
decision?
I am trying in this way:
passing to new thread [NSManagedObject objectID] (to identify object
I want to analyze) and [[NSManagedObject managedObjectContext]
persistanceStoreCoordinator];
in new thread creating new managedContext: myContext =
[[NSManagedContext alloc] init]
and setting coordinator to it: [myContext
setPersistanceStoreCoordinator:__the_one_passed_from_parent_thread__];
finally, if I get managedObject by calling objectWithID, it is in
very 'early' stage. I mean - its properties are exactly, what is
configured by creating new object and described in model. There is no
changes, which should be made by awakeFromInsert.
I have tried to call (void)refreshObject:(NSManagedObject *)object
mergeChanges:(BOOL)flag. Nothing.
Object in original context is correct.
What I am doing wrong? Or maybe there is another way to implement
multithreading?
Any suggestions are welcome.
MR.
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