Just trying to understand, when we try to access an object using an in-memory realm instance, does it replicate the disk persisted realm data at that moment or will it be a clean realm instance with no data in the objects.
I do understand that both the realm instances point to the same object schema but still confused.
I have both disk-persistence and in-memory realm in my project.
When I try to query the disk-persisted realm the data objects are returned if exists while on the other hand the if I perform the same query on in-memory realm it always returns 0 objects.
Any help would be appreciated.
The in-memory Realm will be a clean Realm instance. It does not interfere with any other realm (on-disk or elswhere). All entries will be gone, once your application is terminated.
You can even have multiple in-memory Realms running at once, e.g. to have a clean database for each unit test class. Just make sure you use a different inMemoryIdentifier for each test.
var config = Realm.Configuration()
config.inMemoryIdentifier = self.name // use the test class name as identifier
let realm = try Realm(configuration: config)
return realm