How to do a fluent nhibernate one to one mapping?

Как мне это сделать Я пытаюсь сделать сопоставление один-к-одному.

public class Setting
{
    public virtual Guid StudentId { get; set; }
    public virtual DateFilters TaskFilterOption { get; set; }
    public virtual string TimeZoneId { get; set; }
    public virtual string TimeZoneName { get; set; }
    public virtual DateTime EndOfTerm { get; set; }
    public virtual Student Student { get; set; }

}

// карта классов

 public SettingMap()
        {
           /// Id(Reveal.Member<Setting>("StudentId")).GeneratedBy.Foreign("StudentId");
            //Id(x => x.StudentId);
            Map(x => x.TaskFilterOption).Default(DateFilters.All.ToString()).NvarcharWithMaxSize().Not.Nullable();
            Map(x => x.TimeZoneId).NvarcharWithMaxSize().Not.Nullable();
            Map(x => x.TimeZoneName).NvarcharWithMaxSize().Not.Nullable();
            Map(x => x.EndOfTerm).Default("5/21/2011").Not.Nullable();
            HasOne(x => x.Student);
        }

// карта учеников

public class StudentMap : ClassMap<Student>
    {
        public StudentMap()
        {
            Id(x => x.StudentId);
            HasOne(x => x.Setting).Cascade.All();

        }
    }

  public class Student
    {
        public virtual Guid StudentId { get; private set; }
        public virtual Setting Setting { get; set; }
    }

Теперь каждый раз, когда я пытаюсь создать объект настроек и сохраните его в базе данных, где произошел сбой.

   Setting setting = new Setting
                                          {
                                              TimeZoneId = viewModel.SelectedTimeZone, 
                                              TimeZoneName = info.DisplayName, 
                                              EndOfTerm =  DateTime.UtcNow.AddDays(-1),
                                              Student = student
                                          };

The INSERT statement conflicted with the FOREIGN KEY constraint "FK_Settings_Students". The conflict occurred in database "Database", table "dbo.Students", column 'StudentId'.
The statement has been terminated.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: The INSERT statement conflicted with the FOREIGN KEY constraint "FK_Settings_Students". The conflict occurred in database "Database", table "dbo.Students", column 'StudentId'.
The statement has been terminated.

Что мне не хватает?

Изменить

public class StudentMap : ClassMap<Student>
{
    public StudentMap()
    {
        Id(x => x.StudentId).GeneratedBy.Guid();
        HasOne(x => x.Setting).PropertyRef("Student").Cascade.All();
    }
}

public class SettingMap : ClassMap<Setting>
{
    public SettingMap()
    {
        Id(x => x.StudentId).GeneratedBy.Guid();
        Map(x => x.TaskFilterOption).Default(DateFilters.All.ToString()).NvarcharWithMaxSize().Not.Nullable();
        Map(x => x.TimeZoneId).NvarcharWithMaxSize().Not.Nullable();
        Map(x => x.TimeZoneName).NvarcharWithMaxSize().Not.Nullable();
        Map(x => x.EndOfTerm).Default("5/21/2011").Not.Nullable();
        References(x => x.Student).Unique();
    }
}

// try 1

      Setting setting = new Setting
                                          {
                                              TimeZoneId = viewModel.SelectedTimeZone, 
                                              TimeZoneName = info.DisplayName, 
                                              EndOfTerm =  DateTime.UtcNow.AddDays(-1),
                                              Student = student
                                          };
     studentRepo.SaveSettings(setting);
     studentRepo.Commit();

// try 2

  Setting setting = new Setting
                                          {
                                              TimeZoneId = viewModel.SelectedTimeZone, 
                                              TimeZoneName = info.DisplayName, 
                                              EndOfTerm =  DateTime.UtcNow.AddDays(-1),
                                              Student = student
                                          };

student.Setting = setting
studentRepo.CreateStudent(student);
studentRepo.Commit();

Я получаю эту ошибку для обоих способов

Invalid index 5 for this SqlParameterCollection with Count=5. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.IndexOutOfRangeException: Invalid index 5 for this SqlParameterCollection with Count=5.

Source Error:

Line 76:             using (ITransaction transaction = session.BeginTransaction()) Line 77:   { Line 78:                 transaction.Commit(); Line 79:         } Line 80:         }