Hi Simon,
It does look like you can filter the result set returned by Criteria
with a full text query, though. I found this example in the test cases
of NHibernate.Search:
[Test]
public void UsingCriteriaApi()
{
IFullTextSession s = Search.CreateFullTextSession(OpenSession
());
ITransaction tx = s.BeginTransaction();
Clock clock = new Clock(1, "Seiko");
s.Save(clock);
tx.Commit();
IList list = s.CreateCriteria(typeof(Clock))
.Add(SearchRestrictions.Query("Brand:seiko"))
.List();
Assert.AreEqual(1, list.Count, "should get result back from
query");
s.Delete(clock);
s.Flush();
s.Close();
}
It took me a good bit of digging, but this does work. I suppose that
it's a little strange that it works only in one direction, but I'm not
going to complain too much.
Is there a particular reason that Criteria can't filter full text
queries? Or just that it hasn't been properly implemented? I might
think of remedying the problem if it's just an issue of
implementation.
Anyhow, hopefully this is useful to someone who ran into the same
problem I did.
Thank you for your help!
On Dec 1, 9:51 am, Simon Laroche <[email protected]> wrote:
> Hi Philip,
>
> Criteria cannot be used to filter the results of a full text query. In order
> to filter a a full text query you need to define a filter:
>
> var term = new Term("Engineer", "moi");
> var filter = new QueryFilter(new TermQuery(term));
> q.SetFilter(filter);
>
> Simon
>
>
>
> On Mon, Nov 30, 2009 at 4:49 PM, gadlor <[email protected]> wrote:
> > Hello all,
>
> > I wanted to check if anyone had tried using full text searches with
> > NHibernate.Search in conjunction with ICriteria. I would like to
> > restrict the set of results with ICriteria - rather than indexing all
> > the properties of my objects.
>
> > Here's what I'm attempting to do (I'm using ActiveRecord, btw):
>
> > public static List<Thingy> GetThingyByDescription(string desc)
> > {
> > ISession session = ActiveRecordMediator.GetSessionFactoryHolder
> > ().CreateSession(typeof(ActiveRecordBase));
> > IFullTextSession searchSession =
> > NHibernate.Search.Search.CreateFullTextSession(session);
> > using (var transaction = searchSession.BeginTransaction())
> > {
> > List<Thingy> thingyList = new List<Thingy>();
>
> > IFullTextQuery q = (IFullTextQuery)
> > searchSession.CreateFullTextQuery<Thingy>("Description:" + desc);
> > ICriteria thingyCriteria = searchSession.CreateCriteria
> > (typeof(Thingy));
> > thingyCriteria.Add(Expression.Eq("Engineer", "moi"));
> > q.SetCriteriaQuery(thingyCriteria);
>
> > var results = q.List<Thingy>(); *******
>
> > foreach (Thingy t in results)
> > {
> > thingyList.Add(t);
> > }
>
> > return thingyList;
> > }
> > }
>
> > I'm running into an issue, and I'm not precisely sure how to fix it.
>
> > The call blows up with an exception at the line with all the
> > asterisks:
>
> > [TypeLoadException: Could not load type Thingy. Possible cause: no
> > assembly name specified.]
> > NHibernate.Util.ReflectHelper.TypeFromAssembly
> > (AssemblyQualifiedTypeName name, Boolean throwOnError) +329
> > NHibernate.Util.ReflectHelper.ClassForName(String name) +45
> > NHibernate.Search.Query.FullTextQueryImpl.GetLoader(ISession
> > session) +285
>
> > If I comment out the SetCriteria call, the search does its thing with
> > no problems. The assembly is obviously accessible from the regular
> > full text query.
>
> > Has anybody done something like this successfully? Any insight into
> > the exception? I've taken a look at the source and am going to try
> > building NHibernate.Search with debug symbols so I can take a look at
> > the 'AssemblyQualifiedTypeName,' but if there's anyone with knowledge
> > of this firsthand, you will likely save me many frustrating hours.
>
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