I'm trying out the new faceting using Hibernate Search 5.3. It seems to me that @Facet can only be used to match a valid @Field in the same object.

I have a case where an object need to be faceted using a field in an IndexedEmbedded field, but it seems that is not possible. I've tried applying the facet on the embedded entity, but it is ignored.

e.g 1
@Indexed
class A{
@Field
field c;
...
other fields
}

@Indexed
class B{
@IndexedEmbedded
@Facet(forField="a.c")
A c;
....
other fields
}

E.g 2

@Indexed
class A{
@Field
@Facet
field c;
...
other fields
}

@Indexed
class B{
@IndexedEmbedded
A a;
....
other fields
}

In either case, I'm unable to facet B on field c of A. I get an error like the following:
org.hibernate.search.exception.SearchException: HSEARCH000268: Facet request 'INDIVIDUAL_ZONES' tries to facet on field 'a.c' which either does not exists or is not configured for faceting (via @Facet). Check your configuration

Please, is there any way this can be achieved?

Thanks!