NHibernateQueries

NHibernate Query Samples

SQL Function call

            Vertrag v = null;
            VertragServiceAktuell vsa = null;
            Kostenart kav = null;
            Kostenart kavsa = null;

            var query = Session.QueryOver<BelegGruppe>()
                .Inner.JoinAlias(x => x.Vertrag, () => v)
                .Inner.JoinAlias(() => v.Kostenart, () => kav)
                .Inner.JoinAlias(() => v.VertragServicesAktuell, () => vsa)
                .Left.JoinAlias(() => vsa.Kostenart, () => kavsa)
                .Where(x => x.Id == belegGruppeId)
                .Where(() => vsa.Service.Id == serviceId)
                .Select(Projections.SqlFunction("coalesce",
                                                NHibernateUtil.String,
                                                Projections.Property(() => kavsa.Nummer),
                                                Projections.Property(() => kav.Nummer)));

            return query.SingleOrDefault<string>();