EF Core 6.0 InvalidOperationException：对象已从模型中删除

Question

Am in the process of upgrading a WebApi from .net5 to .net6. Am hitting a wall with the following exception related to EF Core 6.0 during the Entity Configuration of a domain entity called "Order" which has a one-to-many relationship to "ChargeItems":

System.InvalidOperationException HResult=0x80131509 Message=The object has been removed from the model. Source=Microsoft.EntityFrameworkCore StackTrace: at Microsoft.EntityFrameworkCore.Metadata.Internal.ForeignKey.get_Builder() at Microsoft.EntityFrameworkCore.Metadata.Internal.Navigation.OnAnnotationSet(String name, IConventionAnnotation annotation, IConventionAnnotation oldAnnotation) at Microsoft.EntityFrameworkCore.Infrastructure.ConventionAnnotatable.OnAnnotationSet(String name, Annotation annotation, Annotation oldAnnotation) at Microsoft.EntityFrameworkCore.Infrastructure.AnnotatableBase.SetAnnotation(String name, Annotation annotation, Annotation oldAnnotation) at Microsoft.EntityFrameworkCore.Infrastructure.ConventionAnnotatable.SetAnnotation(String name, Object value, ConfigurationSource configurationSource) at Microsoft.EntityFrameworkCore.Infrastructure.ConventionAnnotatable.SetOrRemoveAnnotation(String name, Object value, ConfigurationSource configurationSource) at Microsoft.EntityFrameworkCore.Metadata.Internal.PropertyBase.SetPropertyAccessMode(Nullable 1 propertyAccessMode, ConfigurationSource configurationSource) at Microsoft.EntityFrameworkCore.Metadata.Internal.PropertyBase.Microsoft.EntityFrameworkCore.Metadata.IMutablePropertyBase.SetPropertyAccessMode(Nullable 1 propertyAccessMode, ConfigurationSource configurationSource) at Microsoft.EntityFrameworkCore.Metadata.Internal.PropertyBase.Microsoft.EntityFrameworkCore.Metadata.IMutablePropertyBase.SetPropertyAccessMode(Nullable 1 propertyAccessMode) at Eventec.Persistence.Core.Orders.OrderConfiguration.Configure(EntityTypeBuilder 1 builder) in E:\\Project\\PersisentenceCore\\Orders\\OrderConfiguration.cs:line 101 at Microsoft.EntityFrameworkCore.ModelBuilder.ApplyConfiguration[TEntity](IEntityTypeConfiguration 1 configuration)

This exception is being hit at the following code:

public class OrderConfiguration : IEntityTypeConfiguration<Order>
{
    public void Configure(EntityTypeBuilder<Order> builder)
    {
        builder.ToTable("orders").HasKey(r => r.Id);
        // other property config etc

        // Charge Items
        builder.HasMany(p => p.ChargeItems)
            .WithOne()
            .HasForeignKey("order_id")
            .HasConstraintName("charge_items_order_id_fk")
            .IsRequired()
            .OnDelete(DeleteBehavior.Cascade)
            .Metadata.PrincipalToDependent.SetPropertyAccessMode(PropertyAccessMode.Field);


    }
}

Cant find much by way of troubleshooting help using The Google etc. Nor anything about breaking changes with EF Core 6 to account for this. Of course it was working just fine with EF Core 5.x.

Answer 1

New version, new bugs/breaking changes.

Please go and fill issue/bug report at EF Core GitHub Issue Tracker .

The problematic call is

.Metadata.PrincipalToDependent.SetPropertyAccessMode(PropertyAccessMode.Field);

As a workaround, either remove it completely (it should be the default), or configure it with the EF Core 5.0 introduced Navigation fluent API:

builder.HasMany(p => p.ChargeItems)
    .WithOne()
    .HasForeignKey("order_id")
    .HasConstraintName("charge_items_order_id_fk")
    .IsRequired()
    .OnDelete(DeleteBehavior.Cascade);
//.Metadata.PrincipalToDependent.SetPropertyAccessMode(PropertyAccessMode.Field);

builder.Navigation(p => p.ChargeItems)
    .UsePropertyAccessMode(PropertyAccessMode.Field);