Entity framework 4.3 with required association

Question

I\'m a very strange behavior with EF code first approach and associations. I have two entities:

public class GlobalKpiSectionn
{
    public GlobalKpiSection(         


        

Answer 1

To force cascade deletes, you have to use the fluent configurations. You can then remove the [Required]attribute from the KpiSection property.

Something like this:

public class GlobalKpiSectionn
{
    public GlobalKpiSection()
    {
        this.Regions = new HashSet();
    }

    public virtual ICollection Regions { get; protected set; }  
}

public class Region
{
    public int RegionId { get; set; }

    public bool IsMain { get; set; }

    public int GlobalKpiSectionId { get; set; }
    public virtual GlobalKpiSection KpiSection { get; set; }
}

public class RegionConfig : EntityTypeConfiguration
{
    HasRequired(x => x.KpiSection)
        .WithMany(x => x.Regions)
        .HasForeignKey(x => x.GlobalKpiSectionId)
        .WillCascadeOnDelete(true);
}

public class YourContext : DbContext
{
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Configurations.Add(new RegionConfig());
    }
}