feat(ios): complete P2.1 schema versioning and P2.2 combined edge case tests
P2.1: iOS Schema Versioning Strategy
- Added SCHEMA_VERSION constant and checkSchemaVersion() method in PersistenceController
- Version stored in NSPersistentStore metadata (observability contract, not migration gate)
- CoreData auto-migration remains authoritative; version mismatches logged, not blocked
- Documentation added to ios/Plugin/README.md with migration contract
P2.2: Combined Edge Case Tests
- Added 3 resilience test scenarios to DailyNotificationRecoveryTests.swift:
- test_combined_dst_boundary_duplicate_delivery_cold_start()
- test_combined_rollover_duplicate_delivery_cold_start()
- test_combined_schema_version_cold_start_recovery()
- All tests labeled with @resilience @combined-scenarios comments
- Tests verify idempotency and correctness under combined stressors
P2.3: Android Combined Tests Design
- Created P2.3-DESIGN.md with scope, invariants, and acceptance criteria
- Created P2.3-IMPLEMENTATION-CHECKLIST.md with step-by-step execution plan
- Design ready for implementation to achieve parity with iOS P2.2
Documentation Updates
- Fixed parity matrix: iOS invalid data handling now correctly shows "✅ Recovery tested" with test references
- Updated progress docs (00-STATUS.md, 01-CHANGELOG-WORK.md, 03-TEST-RUNS.md, 04-PARITY-MATRIX.md)
- Updated P2-DESIGN.md to reflect P2.3 scope (Android combined tests)
- Updated SYSTEM_INVARIANTS.md baseline tag references
Baseline Tag
- Created and pushed v1.0.11-p2-complete tag
- Tag represents P2.x completion (schema versioning + combined resilience tests)
All invariants preserved. CI passes. Tests runnable via xcodebuild on macOS.
This commit is contained in:
Matthew Raymer
@@ -227,6 +227,13 @@ extension NotificationConfig: Identifiable {
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// All entities now available: ContentCache, Schedule, Callback, History,
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// NotificationContent, NotificationDelivery, NotificationConfig
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class PersistenceController {
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// MARK: - Schema Versioning
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/// Current schema version (incremented when schema changes)
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/// This is a logical contract for observability, not a migration gate.
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/// CoreData auto-migration remains authoritative.
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private static let SCHEMA_VERSION = 1
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// Lazy initialization
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private static var _shared: PersistenceController?
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static var shared: PersistenceController {
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@@ -254,6 +261,15 @@ class PersistenceController {
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description?.shouldMigrateStoreAutomatically = true
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description?.shouldInferMappingModelAutomatically = true
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// Set initial schema version metadata (for new stores)
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if !inMemory {
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var metadata = description?.metadata ?? [:]
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if metadata["schema_version"] == nil {
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metadata["schema_version"] = PersistenceController.SCHEMA_VERSION
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description?.metadata = metadata
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}
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}
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var loadError: Error? = nil
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tempContainer?.loadPersistentStores { description, error in
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if let error = error as NSError? {
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@@ -280,6 +296,9 @@ class PersistenceController {
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}
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self.container = tempContainer
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// Check schema version (after container is initialized)
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checkSchemaVersion()
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// Verify all entities are available (after container is initialized)
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if let context = tempContainer?.viewContext {
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verifyEntities(in: context)
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@@ -342,6 +361,34 @@ class PersistenceController {
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return true
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}
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/**
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* Check and log schema version
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*
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* Schema version is a logical contract, not a forced migration trigger.
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* CoreData auto-migration remains authoritative; version mismatches are
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* logged, not blocked.
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*/
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private func checkSchemaVersion() {
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guard let store = container?.persistentStoreCoordinator.persistentStores.first else {
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return
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}
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let currentVersion = store.metadata["schema_version"] as? Int ?? 1
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let expectedVersion = PersistenceController.SCHEMA_VERSION
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if currentVersion != expectedVersion {
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print("DNP-PLUGIN: Schema version mismatch - current: \(currentVersion), expected: \(expectedVersion)")
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print("DNP-PLUGIN: CoreData auto-migration will handle schema changes")
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// Update metadata for future reference (does not trigger migration)
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var metadata = store.metadata
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metadata["schema_version"] = expectedVersion
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// Note: Metadata persists on next store save
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} else {
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print("DNP-PLUGIN: Schema version verified: \(currentVersion)")
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}
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}
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/**
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* Verify all entities are available in the model
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*
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@@ -2,7 +2,7 @@
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This directory contains the iOS-specific implementation of the DailyNotification plugin.
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**Last Updated**: 2025-12-08
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**Last Updated**: 2025-12-22
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**Version**: 1.1.0
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## Current Implementation Status
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@@ -116,6 +116,91 @@ The native iOS implementation is located in the `ios/` directory at the project
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- Silent push notification support
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- Advanced prefetch logic
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## Schema Versioning Strategy
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**Current Schema Version:** `1` (initial schema)
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The iOS implementation uses **explicit schema versioning** to achieve parity with Android's Room database versioning approach. This provides observability and migration tracking without interfering with CoreData's automatic migration capabilities.
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### Versioning Approach
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**CoreData Auto-Migration Remains Authoritative**
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The schema version is a **logical contract**, not a forced migration trigger. CoreData auto-migration (`shouldMigrateStoreAutomatically = true`) remains the authoritative mechanism for schema changes. Version mismatches are **logged, not blocked**.
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**Version Tracking**
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Schema version is stored in CoreData persistent store metadata using `NSPersistentStore` metadata dictionary. This approach:
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- ✅ Non-intrusive (does not require schema changes)
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- ✅ Observable (version can be read at any time)
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- ✅ Compatible with CoreData auto-migration
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- ✅ Matches Android's explicit versioning pattern
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**Current Implementation**
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- **Schema Version:** `1` (initial schema, established 2025-09-22)
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- **Version Storage:** `NSPersistentStore` metadata key `"schema_version"`
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- **Version Check:** Performed during `PersistenceController` initialization
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- **Logging:** Version logged on store load; mismatches logged as warnings
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### Migration Contract
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**When to Bump Schema Version**
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The schema version should be incremented when:
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1. **Entity changes:**
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- Adding new entities
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- Removing entities (rare, requires data migration)
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- Renaming entities (requires explicit migration)
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2. **Attribute changes:**
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- Adding new required attributes (requires default values or migration)
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- Removing attributes (requires data cleanup)
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- Changing attribute types (requires type conversion)
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- Renaming attributes (requires explicit migration)
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3. **Relationship changes:**
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- Adding/removing relationships
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- Changing relationship cardinality
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- Renaming relationships
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**When NOT to Bump**
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- Adding optional attributes (CoreData handles automatically)
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- Adding optional relationships (CoreData handles automatically)
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- Changing default values (no schema change required)
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- Adding indexes (metadata change, not schema change)
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**Version Bump Process**
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1. Update CoreData model in Xcode (add/remove/modify entities/attributes)
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2. Increment schema version constant in `PersistenceController`
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3. Update metadata on next store load
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4. Document migration in changelog
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5. Update parity matrix if versioning strategy changes
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### Android Parity
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**Android:** Room database with explicit `version = 2` and `Migration` objects
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**iOS:** CoreData with explicit schema version `1` in metadata + auto-migration
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Both platforms now have:
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- ✅ Explicit version tracking
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- ✅ Migration documentation
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- ✅ Version observability
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- ✅ Migration contract defined
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**Parity Status:** ✅ **Explicit versioning** (P2.1 complete)
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### Related Documentation
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- **Android Schema Versioning:** `android/src/main/java/com/timesafari/dailynotification/DatabaseSchema.kt` (Room `version = 2`)
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- **CoreData Model:** `ios/Plugin/DailyNotificationModel.xcdatamodeld`
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- **PersistenceController:** `ios/Plugin/DailyNotificationModel.swift`
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- **Parity Matrix:** `docs/progress/04-PARITY-MATRIX.md`
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## Testing
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Run iOS-specific tests with:
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