map two classes with same nullable complex properties to same column will result in a NullReferenceException #37335
Description
Bug description
I have a base class and several child classes with some of them share some complex properties. I try to map them into one table and want to map same complex properties into the same column. This will result in a NullReferenceException if the property is null. See example code.
With different column names the same setup works.
Your code
using Microsoft.EntityFrameworkCore;
await using var context = new ProductContext();
await context.Database.EnsureDeletedAsync();
await context.Database.EnsureCreatedAsync();
context.Products.Add(new Product1() { Name = "Product 1" });
await context.SaveChangesAsync();
context.ChangeTracker.Clear();
var product = await context.Products.FirstAsync();
var originalProduct = (Product)context.ChangeTracker.Entries().First().OriginalValues.ToObject();
public sealed class ProductContext : DbContext
{
public DbSet<Product> Products { get; set; }
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
=> optionsBuilder
.UseSqlServer(Environment.GetEnvironmentVariable("Test__SqlServer__DefaultConnection"))
.LogTo(Console.WriteLine, LogLevel.Information)
.EnableSensitiveDataLogging();
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.Entity<Product>().HasDiscriminator<string>("Discriminator")
.HasValue<Product1>("Product1").HasValue<Product2>("Product2");
modelBuilder.Entity<Product1>().ComplexProperty(x => x.Price, p => p.Property(a => a.Amount).HasColumnName("Price"));
modelBuilder.Entity<Product2>().ComplexProperty(x => x.Price, p => p.Property(a => a.Amount).HasColumnName("Price"));
}
}
public abstract class Product
{
public int Id { get; private set; }
public required string Name { get; set; }
}
public class Product1 : Product
{
public Price? Price { get; set; }
}
public class Product2 : Product
{
public Price? Price { get; set; }
}
public sealed class Price
{
public required string Amount { get; init; }
}Stack traces
Verbose output
EF Core version
10.0.1
Database provider
No response
Target framework
.NET 10
Operating system
No response
IDE
Rider