I'd like to copy items between two different UIManagedDocument persistent
stores. What is the proper way to do this?
Assuming I have a NSManagedObject subclass instance mo1 obtained from one
UIManagedDocument, how do I properly copy the values from it to a newly
inserted NSManagedObject subclass instance mo2 in the other UIManagedDocument?
Do I just run through all the properties I've defined for each attribute and do:
mo2.attribute = mo1.attribute
(which I could do by defining a method to do this)? I think this is ok, but I'm
not 100% certain since these come from different NSManagedObjectContext
instances so I want to be certain that won't cause a problem. Do all the
properties need to be copy properties vs. strong/retain properties for this to
work?
Or is there a better/simpler way to do this?
Also, I asked another Core Data question about four days ago, but never got a
response. If you can answer this one too, that would be great.
=======================
If I create a child context of type NSMainQueueConcurrencyType such as:
context = [[NSManagedObjectContext alloc]
initWithConcurrencyType:NSMainQueueConcurrencyType];
[context setParentContext:mainContext];
do I need to call [context performBlock:^{ // some code }];
or can I just use the context normally if I know the code is being executed on
the main thread/queue?
Similarly, do I need to use performBlock on the UIManagedDocument's
managedObjectContext property when I know the code is being executed on the
main thread?
I think the answer to both questions is "no, you do not need to use
performBlock", but I'd like to be certain.
=====================
Thanks,
Dave
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