Hibernate associated data as a query condition

Hibernate, in the foreground when the table is associated with the data as a query condition, because hibernate only accept the recognized attributes (that is, in the corresponding Hbm.xml file can be found in the properties), if not, in the background implementation class in the HQL need to use an alias query:

Front page:

Query hql in the background:

if (GQM.GETGTM () = null &&
Gqm.getgtm (). GETSM ()! = null &&
Gqm.getgtm (). GETSM (). Getuuid ()! = null &&
Gqm.getgtm (). GETSM (). Getuuid (). = 1) {
Dc.createalias ("Gtm", "G");
Dc.createalias ("G.sm", "s");
Dc.add (Restrictions.eq ("S.uuid", Gqm.getgtm (). GETSM (). Getuuid ()));
}

Another way of writing aliases:

Am A
A.BM AB
AB.CM ABC
ABC.DM ABCD
Abcd.name

Hibernate associated data as a query condition