[Hibernate Search]Projections returning list of null objects

AgentHubcap · **Joined:** Thu Dec 20, 2007 1:49 pm **Posts:** 9

I'm having an issue with projections with hibernate search. My document includes several fields including "name" and "count". When executing the code below it passes back a list of the proper size, but the object arrays are all null (i.e. [null,null]). Is there something that I'm doing wrong here?

Code:

EntityManager em = getEntityManager();
FullTextEntityManager fullTextEntityManager = Search.createFullTextEntityManager(em);

FullTextQuery fullTextQuery = fullTextEntityManager.createFullTextQuery( parseQuery(query), Label.class);

fullTextQuery.setProjection("name", "count");

List<Object[]> list = fullTextQuery.getResultList();

emmanuel · **Posted:** Fri Jan 04, 2008 7:41 am

I bet the fields are not stored @Field(store=Store.YES)

AgentHubcap · **Joined:** Thu Dec 20, 2007 1:49 pm **Posts:** 9

emmanuel wrote:

I bet the fields are not stored @Field(store=Store.YES)

I'm using a class bridge to perform the index. Here's the annotation:

@ClassBridge(name = "label", index = Index.UN_TOKENIZED, store = Store.YES, impl = LabelBridge.class)

I can also see all the values in LUKE, so I'm pretty sure they're stored.

I even tried doing a projection using FullTextQuery.THIS, and that returned null entity objects...

Could this be an issue with the class bridge?

emmanuel · **Posted:** Fri Jan 04, 2008 2:48 pm

AgentHubcap wrote:

emmanuel wrote:

I bet the fields are not stored @Field(store=Store.YES)

I'm using a class bridge to perform the index. Here's the annotation:

@ClassBridge(name = "label", index = Index.UN_TOKENIZED, store = Store.YES, impl = LabelBridge.class)

I can also see all the values in LUKE, so I'm pretty sure they're stored.

I even tried doing a projection using FullTextQuery.THIS, and that returned null entity objects...

Could this be an issue with the class bridge?

Ah right, ClassBridge are not handled in projection (open a JIRa issue please with a test case).

FullTextQuery.THIS returns null? I have hard time to believe this. Can you write a minimal reproducible test case and attach it to JIRA.

AgentHubcap · **Joined:** Thu Dec 20, 2007 1:49 pm **Posts:** 9

emmanuel wrote:

AgentHubcap wrote:

emmanuel wrote:

I bet the fields are not stored @Field(store=Store.YES)

I'm using a class bridge to perform the index. Here's the annotation:

@ClassBridge(name = "label", index = Index.UN_TOKENIZED, store = Store.YES, impl = LabelBridge.class)

I can also see all the values in LUKE, so I'm pretty sure they're stored.

I even tried doing a projection using FullTextQuery.THIS, and that returned null entity objects...

Could this be an issue with the class bridge?

Ah right, ClassBridge are not handled in projection (open a JIRa issue please with a test case).

FullTextQuery.THIS returns null? I have hard time to believe this. Can you write a minimal reproducible test case and attach it to JIRA.

The object itself isn't null, but every field in it is null.

emmanuel · **Posted:** Sat Jan 05, 2008 5:39 am

THIS is loaded by Hibernate Core, so unless the object contains null properties in DB...

Isegrim · **Joined:** Tue Apr 14, 2009 10:03 am **Posts:** 7

emmanuel wrote:

Ah right, ClassBridge are not handled in projection (open a JIRa issue please with a test case).

Is this already resolved? I am experiencing the same problem here. I searched Jira but could not find anything related there.

If not I would create a new Jira issue.

-Tom

Isegrim · **Joined:** Tue Apr 14, 2009 10:03 am **Posts:** 7

emmanuel wrote:

Ah right, ClassBridge are not handled in projection (open a JIRa issue please with a test case).

Is this already resolved? I am experiencing the same problem here. I searched Jira but could not find anything related there.

If not I would create a new Jira issue.

-Tom

Isegrim · **Joined:** Tue Apr 14, 2009 10:03 am **Posts:** 7

Opened Jira issue HSEARCH-372.

sanne.grinovero · **Posted:** Wed May 20, 2009 6:00 pm

Hi,
thanks for the report, unfortunately what's not in JIRA gets lost.
If you would like to provide a testcase it's quite easy if you give a look to the sources,
as there are lots of simple tests. I'd recommend to learn how to make standalone testcases
anyway, it will save you a lot of time.

Here are some pointer to download the source code and setup your environment:
https://www.hibernate.org/462.html

If you have any trouble please report, so we can improve something.

Isegrim · **Joined:** Tue Apr 14, 2009 10:03 am **Posts:** 7

Ok, thanks for the pointer, I will have a look. Standalone testcases, especially if EJB3 beans are involved, are somewhat painful in the begining. Guess I simply was too lazy yet ;-)