Describe EF Core change tracking with DetectChanges, snapshots, and entity states.
npx skills add https://github.com/dotnet/efcore --skill change-tracking
Please help me install this Agent Skill. Skill: change-tracking Source: https://github.com/dotnet/efcore/tree/main/.agents/skills/change-tracking Command: npx skills add https://github.com/dotnet/efcore --skill change-tracking
EF Core's change-tracking subsystem ensures accurate detection of modified properties and proper state management during SaveChanges.
Configure and wire the Change Tracker components (StateManager, InternalEntityEntry, ChangeDetector, SnapshotFactoryFactory) to enable accurate change detection and snapshotting during SaveChanges.
High-intent search queries and answers about installing and using this skill.
EF Core change tracking detects modified properties during SaveChanges by utilizing the ChangeDetector to compare current entity values against generated snapshots. The StateManager and InternalEntityEntry components track these differences to ensure accurate state management and persistence.
Snapshot generation in EF Core entity state management captures the original values of entities upon loading. The SnapshotFactoryFactory creates these snapshots, allowing the ChangeDetector to identify exactly which properties have been modified before executing SaveChanges.
To configure EF Core change tracking components, you wire the StateManager, InternalEntityEntry, ChangeDetector, and SnapshotFactoryFactory together. This setup enables accurate change detection, original value handling, and snapshotting during SaveChanges operations.
DetectChanges might not capture entity updates if the snapshot generation or InternalEntityEntry state management is improperly configured. Verifying that the ChangeDetector correctly compares original values against current entity properties ensures accurate change detection.
Yes, you can debug EF Core's change-tracking pipeline for complex scenarios. The Skill documents the internal components like StateManager, InternalEntityEntry, ChangeDetector, and SnapshotFactoryFactory to support debugging and extending the change detection logic.
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