Fluent Nhibernate Automap convention for not-null field

Question

Could some one help, how would I instruct automap to have not-null for a column?

public class Paper : Entity
{
    public Paper() { }

            [DomainSignature]
            [NotNull, NotEmpty]
            public virtual string ReferenceNumber { get; set; }

            [NotNull]
            public virtual Int32 SessionWeek { get; set; }
}

But I am getting the following:

 <column name="SessionWeek"/>

I know it can be done using fluent-map. but i would like to know it in auto-mapping way.

Answer 1

Thank you. Also, for reference properties ReferenceConvention need to be done. This is the code that works:

public class ColumnNullConvention : IPropertyConvention
{
    public void Apply(IPropertyInstance instance)
    {
        if (instance.Property.MemberInfo.IsDefined(typeof(NotNullAttribute), false))
            instance.Not.Nullable();
    }

}  public class ReferenceConvention : IReferenceConvention
{
    public void Apply(FluentNHibernate.Conventions.Instances.IManyToOneInstance instance)
    {
        instance.Column(instance.Property.Name + "Fk");


        if (instance.Property.MemberInfo.IsDefined(typeof(NotNullAttribute), false))
            instance.Not.Nullable();

    }
}