Check if indexed field exists

Question

I'm trying to migrate my application from hibernate search 5 to 6. What I noticed in version 6 is that a field validation is added and you can't search on fields that doesn't exists in the index. Unfortunately I have business logic that relied on that. Is there a way to access ElasticsearchIndexModel class(as far as I can see in this class is the fields state) and check if a specific field exists? Or is there any way to do that at all?

Answer 1

There is a metamodel API.

Something like this should work:

<T> boolean isSearchable(SearchMapping mapping, Class<T> entityClass,
        String fieldPath) {
    SearchIndexedEntity<T> entity = mapping.indexedEntity( entityClass ); 
    IndexDescriptor index = bookEntity.indexManager().descriptor();
    Optional<IndexFieldDescriptor> fieldOptional = index.field(fieldPath)
    if (!fieldOptional.isPresent()) {
        return false;
    }
    IndexFieldDescriptor field = fieldOptional.get();
    return field.isValueField() && field.toValueField().type().searchable();
}

You can access the SearchMapping this way:

SearchMapping mapping = Search.mapping( entityManagerFactory ); 

Or:

SearchMapping mapping = Search.mapping( entityManager.getEntityManagerFactory() ); 

Or in Quarkus, you can simply have it injected into your beans:

public class MyBean {
    @Inject
    SearchMapping mapping;


    ...
}