[Hibernate Search] Indexing objects in classes

fabreax · **Posted:** Mon May 07, 2007 10:45 am

Hello,

I have a class called Document :

Code:

@Indexed
public class Document {

   @DocumentId
   private Integer id;

   @Field(index=Index.TOKENIZED, store=Store.YES)
   private String titre;

   // getters and setters
}

and a class called Entite which include a list of Document :

Code:

@Indexed
public class Entite
{
   @DocumentId
   private Integer id;

   @Field(index=Index.TOKENIZED, store=Store.YES)
   private String resume;

   @ContainedIn
   private List documents;

   // getters and setters
}

and I want to have all "Entite" in which there is one "Document" which have titre=something.

I tried that :

Code:

      FullTextSession fullTextSession = Search.createFullTextSession(s);
   
      QueryParser parser = new QueryParser("title", new StopAnalyzer());

      String requete = "titre:something";

      org.apache.lucene.search.Query luceneQuery = null;
      try {
         luceneQuery = parser.parse(requete);
      } catch (ParseException e) {
         e.printStackTrace();
      }
      org.hibernate.Query fullTextQuery = fullTextSession.createFullTextQuery(luceneQuery,Entite.class);

      List result = (fullTextQuery).list(); //return a list of managed objects
      Iterator i = result.iterator();

      while(i.hasNext())
      {
         System.out.println("Objet trouve : "+i.next());
      }

but it found nothing. And if I remove "Entite.class" restriction, there are "Document" results but not "Entite" ...

Thank you.

emmanuel · **Posted:** Mon May 07, 2007 11:29 am

replace @ContainedIn with @IndexedEmbedded

and

your quesry should be "documents.titre:whatever"

fabreax · **Posted:** Mon May 07, 2007 11:50 am

Thank you Emmanuel,

I replaced @ContainedIn with @IndexedEmbedded

My query is "documents.titre:something" but there is no result.

fabreax · **Posted:** Wed May 09, 2007 4:33 am

I downloaded the last Hibernate Search (from SVN).

It seems that "documents.titre:something" doesn't work.

Moreover, I have :

Code:

@IndexedEmbedded
private List documents;

fabreax · **Posted:** Fri May 11, 2007 11:18 am

emmanuel · **Posted:** Mon May 14, 2007 11:09 am

It may be because you are missing the generic type
it has to be a List<Document>, otherwise, HSearch cannot guess the type

fabreax · **Posted:** Mon May 14, 2007 1:10 pm

Yes, it's only a List, not a List<Document>, because I had problems when with List<Document>.

I muse use List<Document> ?

emmanuel · **Posted:** Mon May 14, 2007 1:53 pm

I m pretty sure it's mandatory yes. At least it was in a previous version of the code. I remember I relaxed part of it in SVV HEAD but I not guaranty here.

fabreax · **Posted:** Tue May 15, 2007 6:10 am

I made the update :
@IndexedEmbedded
private List<Document> documents;

(no update in cfg.xml)

and the problem still appears.

fabreax · **Posted:** Tue May 15, 2007 8:37 am

This is my Entite class :

Code:

@Indexed
public class Entite
{
   @DocumentId
   private Integer id;

   @Field(index=Index.TOKENIZED, store=Store.YES)
   private String titre;

   @IndexedEmbedded
   private List<Document> documents;

   public Entite() { }
   
   public Entite(String titre)
   {
      documents = new ArrayList<Document>();
      this.titre = titre;
   }

   // getters and setters
}

My Document class :

Code:

@Indexed
public class Document
{
   @DocumentId
   private Integer id;

   @Field(index=Index.TOKENIZED, store=Store.YES)
   private String titre;
   
   public Document() {}
   
   public Document(String titre)
   {
      this.titre = titre;
   }

   // getters and setters

and my mapping.hbm.xml :

Code:

<hibernate-mapping package="modele">
   <class name="Entite" table="Entite" lazy="true">
      <id name="id" column="Id">
         <generator class="increment" />
      </id>

      <property name="titre" column="Titre" />

      <list name="documents" cascade="all">
         <key column="IdEntite" />
         <index column="IdDocument" />
         <one-to-many class="Document" />
      </list>
   </class>

   <class name="Document" table="Document" lazy="true">
      <id name="id" column="Id">
         <generator class="increment" />
      </id>
      <property name="titre" column="Titre" />
   </class>
</hibernate-mapping>

My Lucene Query is

Code:

"documents.titre:do*"

And I have a Document which title is "document 1"

emmanuel · **Posted:** Tue May 15, 2007 1:16 pm

try and run you app with a debugger, something in your environment is causing the issue. Also check your index with luke, it's a fantastic tool to debug lucene behavior

fabreax · **Posted:** Wed May 16, 2007 4:22 am

Thank you.
I used Luke to open my index files. In "Entite" class, there isn't "documents.titre" field. There is "id" and "titre".

I opened other index files of other classes. For example, I have a field "private Type type;" in a class, and Type has a "private String mime;" attribute.
Therefore, I have "type.mime" field in my index, good ! But it doesn't work with lists.

I will try to start from scratch a new Hibernate test project.

fabreax · **Posted:** Wed May 16, 2007 5:36 am

I found where the problem is but i don't know why. I always delete index files to be sure.

I have "documents.titre" in indexes (it's what I want) if my code is :

Code:

Transaction tx = session.beginTransaction();            
Entite entite1 = new Entite("entite 1");
session.persist(entite1);

entite1.getDocuments().add(new Document("document 1"));
tx.commit();

I haven't "documents.titre" in indexes if my code is :

Code:

Transaction tx = session.beginTransaction();            
Entite entite1 = new Entite("entite 1");
session.persist(entite1);
tx.commit();
      
tx = session.beginTransaction();
entite1.getDocuments().add(new Document("document 1"));
tx.commit();

emmanuel · **Posted:** Thu May 17, 2007 8:29 pm

Ah interesting.
http://opensource.atlassian.com/projects/hibernate/browse/HSEARCH-56

emmanuel · **Posted:** Thu May 17, 2007 8:30 pm

the workaround is to touch the owning entity
or manually call fullTextSession.index(owningEntity);