In order to save my current NSManagedObjectContext I use [localContext MR_saveNestedContexts]; but I get a warning that the method has been deprecated.
How should I save an NSManagedObjectContext with the latest version of Magical Record (literally pulled from GitHub today, Jul 19 2013).
Check out their documentation.
https://github.com/magicalpanda/MagicalRecord/blob/master/Docs/Saving-Entities.md
Try using
- (void) MR_saveToPersistentStoreWithCompletion:(MRSaveCompletionHandler)completion;
I'm not using the latest version of MagicalRecord, but I think this should be correct
//get the context for the current thread
//this context can be updated by anyone other process on this thread that uses the same MR_contextForCurrentThread call
//it's a local store that can be merged to a parent store
NSManagedObjectContext *localContext = [NSManagedObjectContext MR_contextForCurrentThread];
//create an NSManagedObject of type YourEntity and insert it into the localContext object
NSManagedObject *obj = [YourEntity MR_createInContext:localContext];
//make any updates to obj
//save the localContext async
//this call should save all nested NSManagedObjectContexts as well (if they exist)
[localContext MR_saveToPersistentStoreWithCompletion:^{
//when the async save is complete, this block gets executed
//blocks work very similarly to javascript callbacks
//basically it's a function reference or block of code that get's packaged up and can be passed around
//In this case, the completion block allows to to run any code after the save has been completed.
}];
One thing I didn't realize when I started was when I created my entity, it also inserted it into the context. It caused me to accidentally save objects that I didn't need to persist. To avoid this I setup a subcontext and only save it when I want to persist the objects.
self.context = [[NSManagedObjectContext alloc] initWithConcurrencyType:NSMainQueueConcurrencyType];
self.context.parentContext = [NSManagedObjectContext MR_defaultContext];