Re: NSManagedObject.managedObjectContext is nil???
Re: NSManagedObject.managedObjectContext is nil???
- Subject: Re: NSManagedObject.managedObjectContext is nil???
- From: Dave Fernandes <email@hidden>
- Date: Wed, 27 Mar 2019 16:08:08 -0400
Just to clarify, the moc exists, but the reference to it is nil? Or has the
moc, itself, been deallocated?
> On Mar 27, 2019, at 3:40 PM, Rick Mann <email@hidden> wrote:
>
> This is proving very hard to diagnose, as it doesn't always happen. I tried
> observing -managedObjectContext, but it never gets called with a nil value.
> Moreover, my entity's -dealloc method is sometimes called even though none of
> the -awake methods gets called. This is a complex app with a lot of async
> operation, so this entity gets created and destroyed often, making it that
> much harder to figure out exactly what's going on.
>
> I can bulletproof the place where the crash occurs when the moc is nil, but
> I'd really like to track down the underlying problem.
>
>> On Mar 27, 2019, at 12:17 , Mike Abdullah <email@hidden> wrote:
>>
>> Given the number of objects Core Data is designed to juggle, managing that
>> number of weak references might well affect performance. Besides, wouldn’t
>> you still the same result, that your object has a nil reference to the
>> context because the context has been deallocated?
>>
>> Furthermore, I think you can also observe this affect on deleted objects
>> once the context has been saved, if you’re still holding a reference to any
>> such objects.
>>
>> Mike.
>>
>> Sent from my iPhone
>>
>>> On 26 Mar 2019, at 21:57, Rick Mann <email@hidden> wrote:
>>>
>>> The implication there is that an object has a weak reference to the MOC?
>>> Ah, in the header I see it's `assign`. I wonder why they do that and not
>>> `weak`.
>>>
>>> Thanks, I'll look into it.
>>>
>>>> On Mar 26, 2019, at 14:50 , Richard Charles <email@hidden> wrote:
>>>>
>>>> You have retained the managed object outside the managed object context.
>>>>
>>>> --Richard Charles
>>>>
>>>>
>>>>> On Mar 26, 2019, at 1:04 PM, Rick Mann <email@hidden> wrote:
>>>>>
>>>>> I'm seeing a situation where my NSManagedObject's managedObjectContext is
>>>>> nil. It doesn't happen all the time though. Any idea why? Thanks!
>>>>>
>>>>> --
>>>>> Rick Mann
>>>>> email@hidden
>>>>
>>>
>>>
>>> --
>>> Rick Mann
>>> email@hidden
>>>
>
>
> --
> Rick Mann
> email@hidden <mailto:email@hidden>
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