Nullable Owned Entity Data Is Deleted When Moving Entity Between Parents #36206
Description
Bug description
Summary
When moving an entity with owned data from one parent to another in Entity Framework Core, the owned data is unexpectedly deleted during SaveChanges().
Expected Behavior
The owned data should be preserved when moving an entity between parents.
Actual Behavior
The owned data becomes null after moving the entity to a new parent.
Minimal Reproduction
public class Parent
{
public int Id { get; set; }
public List<EntityWithOwnedData> Entities { get; set; } = new List<EntityWithOwnedData>();
}
public class EntityWithOwnedData
{
public Parent Parent { get; set; }
public int Id { get; set; }
public OwnedData? Data { get; set; }
}
public class OwnedData
{
public string Value { get; set; }
}
public class TestDbContext : DbContext
{
public DbSet<Parent> Parents { get; set; }
public DbSet<EntityWithOwnedData> Entities { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<EntityWithOwnedData>()
.OwnsOne(e => e.Data);
}
}
// Test that demonstrates the issue
var parent1 = new Parent();
var parent2 = new Parent();
var entity = new EntityWithOwnedData
{
Data = new OwnedData { Value = "Test Value" }
};
parent1.Entities.Add(entity);
context.Parents.AddRange(parent1, parent2);
context.SaveChanges();
Assert.NotNull(entity.Data); // ✅ Passes - data exists
// Move entity to new parent
parent1.Entities.Remove(entity);
parent2.Entities.Add(entity);
context.SaveChanges();
Assert.NotNull(entity.Data); // ❌ Fails - data is nullEnvironment
- Entity Framework Core 9.0.0
- .NET 9.0
- Reproduced on SQLite, PostgreSQL, and SQL Server
The issue occurs specifically when using owned entities in a collection navigation property and moving the containing entity between different parents.
Your code
https://github.com/uflowie/efcore-owned-entity-move-bugStack traces
Verbose output
EF Core version
9.0.0
Database provider
No response
Target framework
No response
Operating system
No response
IDE
No response