Error deleting a table row splitted on multiple entities

Question

I want to delete a table row that is split on two entities.

If I try to delete the main entity, I get an error if before I don\'t load the related other entity using

Answer 1

Replace your override method with this code and check

protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
       modelBuilder.Entity() // one-to-one
           .ToTable("Products")
           .HasKey(e => e.Id)
           .HasRequired(e => e.Info)
           .WithRequiredDependent(e => e.Product);

       modelBuilder.Entity() // map to the same table Products
           .ToTable("Products")
           .HasKey(e => e.Id);

       //add this code
       modelBuilder.Entity()
            .HasRequired(p => p.Photo) // "Photo"  defined in Product class for ProductPhoto class's object name
            .WithRequiredPrincipal(c => c.Product);// "Product"  defined in ProductPhoto class for Product's class object name


            base.OnModelCreating(modelBuilder);
}