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Intro

Core Data Stack: ios10

Managed Object Model

Schema Changes

The Dreaded Persistent Store / Data Model Mismatch Exception

Option 1: Delete the app and reinstall

Option 2: Core Data Migrations

Lightweight Migrations

Configure Core Data Stack

Some help from editor

Case 2

Define Custom Mapping

Case 3

Custom Migration Policy (3/3)

Manual

Testif Migration is Needed

Migrate Stores Progressively

Identity Model compatible with Store

Migrate Store from src to dst model

Find Mapping Model

NoSQL Option for Persisting Data

Data Modeling

JSON to Native Mapping

NoSQL: Example 2

Couchbase Lite

Resources

Description:

Explore Core Data migration strategies and a NoSQL alternative in this 25-minute conference talk from try! Swift NYC 2017. Dive into lightweight and custom migration techniques for handling database schema changes in Core Data. Learn about the challenges of data migrations and discover how NoSQL databases, specifically Couchbase Mobile, can eliminate the need for data models and simplify the migration process. Gain insights from speaker Priya Rajagopal, a Mobile Developer Advocate, as she walks through practical examples and provides a comprehensive overview of database migration options for Swift developers.

Core Data Migrations - Can We Do Better?

try! Swift Conference

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#Conference Talks #try! Swift Conference #Programming #Mobile Development #iOS Development #Databases #NoSQL Databases #Computer Science #Database Management #Data Persistence #Database Migration

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