Firestore and Codable NSManagedObject subclass in SwiftUI

Sample app to demonstrate how to encode/decode Firestore document data to Core Data NSManagedObject subclass using Codable API, and use @FetchRequest to display data in SwiftUI views.

Project overview

Since Firestore's support for Swift's Codable API, it became easier to map Firestore data to any object that conforms to Codable protocol, but NSManagedObject subclass does not conform to Codable, and we have to do that manually.

Medium Article:

Firestore and Codable Core Data NSManagedObject in SwiftUI

References

• Mapping Firestore Data in Swift - The Comprehensive Guide
• Using Codable with Core Data and NSManagedObject
• Working with Codable and Core Data
• @DocumentID not populated with custom codable implementation
• Update CoreData in init(from:)

Build and Install

Requirements:

• iOS 16.6+
• Xcode 15
• Swift 5.9