How to delete a record with a foreign key constraint?

Question

Started a new ASP.NET MVC 3 application and getting the following error:

The primary key value cannot be deleted because references to this key stil

Answer 1

Found the solution:

public class FoodJournalEntities : DbContext
{
    public DbSet Journals { get; set; }
    public DbSet JournalEntries { get; set; }
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Entity()
               .HasOptional(j => j.JournalEntries)
               .WithMany()
               .WillCascadeOnDelete(true);
        base.OnModelCreating(modelBuilder);
    }
}

Source