Core Data Fundamentals - CheatSheet (Simple)

README.md

Core Data Fundamentals - CheatSheet (Simple)

Here, I will save basic coredata information for anyone/me would like a quick refresh for these fundamentals from time to time.

What is Core Data

• Core Data is not a database, but instead it manages an Object Graph.

Multithreading

• NSManagedObject and NSManagedObjectContext in Core Data are not thread-safe.

• Core Data avoids data race issues by operating on NSManagedObject instances and NSManagedObjectContext instances in a serial queue.
  This is why we need to place the operation code within the closures of perform or performAndWait.

• Developers should perform operations on the main thread queue for the view context and the managed object instances registered within it. Similarly, we should perform operations on the serial queue created by the private context for private contexts and the managed objects registered within them.

Several Tips on Core Data Concurrency Programming

• Enable Core Data Concurrency Debugging Parameters
  To void issues like .......... to be continued

Misc

• ModelContext of SwiftUI is like a wrapped version of NSManagedObjectContext

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References:

• Core Data Fundamentals - Exploring the Core Data Stack
  https://cocoacasts.com/exploring-the-core-data-stack

• Concurrent Programming in SwiftData https://betterprogramming.pub/concurrent-programming-in-swiftdata-c9bf021a4c2d

NSPersistentContainer Class

• It encapsulates the details of setting and managing a core data stack.