NHibernate QueryOver 限制字符串长度

Question

如何通过字符串属性的长度限制查询？例如。就像是:

NHSession.QueryOver<Customer>()
    .Where(p => p.RegistryCode.Length == 8)

Answer 1

像这样的事情可能会奏效

NHSession.QueryOver<Customer>()
    .Where(
        Restrictions.Eq(
            Projections.SqlFunction("length", NHibernateUtil.String, 
                Projections.Property<Customer>(x => x.RegistryCode)),
            8
        )
    )