Cannot use collections with InExpression

Question

I\'ve just delved into a bit of NHibernate and I\'m having trouble with one of the more \'complex\' (to me!) queries I have to write. The scenario is:

I\'ve got a \'Staf

Answer 1

You need to

.CreateAlias("Skills", "sks")
.Add(Restrictions.In("sks.id", skillIdList))

I'm not sure if this can be done with a list of skill objects. Either way, the sql is going to end up the same as above.

Note that this will create a Cartesian product so you might want to use an exists subquery or .SetResultTransformer(new DistinctRootEntityResultTransformer()) to get back a list of distinct Staff.