Hi all!
We have a problem restricting the output in one of our Hibernate search queries.
We would like to restrict the result to only allow results with a certain status.
We check the status on several fields in the query. Here is an extract of our code.
The problem we have is that field2 below sometimes can be null and that is OK but we would like to build the query somehow like
"if field1.field2 == null or field1.field2.status.statusId == 3"
Is that possible?

// status check, doesn't work if field2 is null
bool.must(queryBuilder
.keyword()
.onField("field1.field2.status.statusId")
.matching(3)
.createQuery());
bool.must(queryBuilder
.keyword()
.onField("field1.status.statusId")
.matching(3)
.createQuery());
bool.must(queryBuilder
.keyword()
.onField("status.statusId")
.matching(3)
.createQuery());

We have solved the problem.
We ended up using The Lucine API and the QueryParser.
We also used @IndexedEmbedded(indexNullAs = IndexedEmbedded.DEFAULT_NULL_TOKEN) on field2.

bool.must(parser.parse("field1.field2:_null_" + " OR field1.field2.status.statusId:3"));

Have we found a bug or is there a logical explanation to the following?
As you can see above, we use the constant IndexedEmbedded.DEFAULT_NULL_TOKEN which holds the value "__DEFAULT_NULL_TOKEN__".
First we tried parser.parse("field1.field2:"+IndexedEmbedded.DEFAULT_NULL_TOKEN but this didn't work. When I looked in the index with Luke, it was indexed as _null_.
Then I tried @IndexedEmbedded(indexNullAs = "MY_NULL_VALUE"), the index showed "MY_NULL_VALUE" in Luke but the query still didn't work when I used "MY_NULL_VALUE" in the query.
I an only get it to work if I use @IndexedEmbedded(indexNullAs = IndexedEmbedded.DEFAULT_NULL_TOKEN) and _null_ as value in the query.

If only IndexedEmbedded.DEFAULT_NULL_TOKEN is an accepted value, why can we choose a value in the first place?
And why does "__DEFAULT_NULL_TOKEN__" get translated to "_null_" in the index?

Anyone have an explanation to this behaviour?

Regards
Andreas