SwiftData Migration Diagnostics

关于

SwiftData Migration Diagnostics provides a systematic framework for troubleshooting complex persistence issues in modern xOS applications. It helps developers identify the root causes of production crashes and data corruption, such as missing models in VersionedSchema or incorrect relationship inverse declarations. By offering clear diagnostic patterns and verification checklists, the skill ensures that schema transitions are handled correctly on real devices, moving beyond the limitations of simulator testing to maintain data integrity throughout the app lifecycle.

主要功能

• Systematic diagnostic workflows for common SwiftData crash messages and error types
• Guidance on using custom migration stages to prevent data loss during schema transitions
• 61 GitHub stars
• Verification checklists for schema versioning, model inclusion, and migration plan registration
• Real-device testing protocols to identify discrepancies between simulator behavior and production environments
• Implementation patterns for fixing many-to-many relationship inverses and iOS 17.0 compatibility bugs

使用场景

• Troubleshooting app crashes occurring immediately after a SwiftData schema update
• Ensuring custom migration logic correctly preserves user data during complex schema transformations
• Fixing broken or nil relationships following a data model migration