CoreData detect database inconsistency on start up - ios

Question

We have some code to determine if there is no database file currently created. If this is the case, we do some initialization routines to populate the user's database based on some files that may exist on the file system (basically a migration routine).
The routine is basically like this
NSURL * defaultStorePath = [NSPersistentStore MR_defaultLocalStoreUrl];
BOOL initializeDatabase = ![[NSFileManager defaultManager] fileExistsAtPath:[defaultStorePath path]];
[MagicalRecord setupCoreDataStackWithAutoMigratingSqliteStoreAtURL:defaultStorePath];
if(initializeDatabase)
// ... ingest user files ...
So this works well if the .sqlite file is not present. However if the .sqlite-wal or .sqlite-shm files are missing/corrupt, we can't find a way to detect this scenario.
We would like to do a data integrity check or something in this case.

Answer 1

Without MagicalRecord:
NSURL *storeURL = ...
NSError *error;
NSPersistentStore *persistentStore = [_persistentStoreCoordinator addPersistentStoreWithType:NSSQLiteStoreType configuration:nil URL:storeURL options:options error:&error];
if (persistentStore) {
// further initialization
} else {
switch (error.code) {
case NSFileReadCorruptFileError: {
NSLog(#"database corrupted.");
// delete .sqlite, -wal and -shm
// make another attempt to add persistent store
break;
}
case NSPersistentStoreIncompatibleVersionHashError: {
NSLog(#"database model updated.");
// migrate
break;
}
default: {
NSLog(#"unresolved error %#", error.localizedDescription);
abort();
}
}
}

Answer 2

Here is an example, and I hope it will be helpful.
func configurePersistentStore() {
let nc = NSNotificationCenter.defaultCenter()
nc.addObserver(self, selector:#selector(self.dataBaseWillBeRecreated(_:)), name:kMagicalRecordPSCMismatchWillDeleteStore, object:nil)
MagicalRecord.setLoggingLevel(MagicalRecordLoggingLevel.Warn)
// if sqlite database does not match the model you provided, delete store.
// MagicalRecord.setShouldDeleteStoreOnModelMismatch(true)
MagicalRecord.setupCoreDataStackWithStoreNamed(kPersistentStoreName)
if ESGlobal.sharedInstance().firstRun { // User first run your app after installation.
self.fillDefaultDataToSQLiteDB() // fill data
}
}