- where.add((Constraint("cn", "cn", None), 'exact', "foo"), AND)
- where.add((Constraint("givenName", "givenName", None), 'exact', "bar"), AND)
+ where.add((Constraint("cn", "cn", CharField()), 'exact', "foo"), AND)
+ where.add((Constraint("givenName", "givenName", CharField()), 'exact', "bar"), AND)