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Hibernate Search 6.0.0.Beta8 released

Posted by    |       Hibernate Search Lucene Elasticsearch Releases

Hibernate Search is a library that integrates Hibernate ORM with Apache Lucene or Elasticsearch by automatically indexing entities, enabling advanced search functionality: full-text, geospatial, aggregations and more. For more information, see Hibernate Search on hibernate.org.

We just published Hibernate Search 6.0.0.Beta8.

This release mainly adds support for entity graphs in search queries and changes @Indexed so that it’s inherited. It also includes an upgrade to Lucene 8.5.2, Elasticsearch 7.7.0 and Hibernate ORM 5.4.17.Final.

Getting started with Hibernate Search 6

If you want to dive right into the new, shiny Hibernate Search 6, a good starting point is the getting started guide included in the reference documentation.

Hibernate Search 6 APIs differ significantly from Hibernate Search 5.

For more information about migration and what we intend to do to help you, see the migration guide.

What’s new

Finer loading options in search queries

As of HSEARCH-3628, entity graphs can be passed to search queries to control the associations that will be loaded eagerly.

@Entity
@Indexed
@NamedEntityGraph(
                name = "preload-associates",
                attributeNodes = @NamedAttributeNode("associates")
)
public class Manager {

        @Id
        private Integer id;

        @FullTextField(analyzer = "name", projectable = Projectable.YES)
        private String name;

        @OneToMany // The association's fetch type is lazy by default.
        @OrderColumn
        private List<Associate> associates = new ArrayList<>();

        // ...
}
List<Manager> hits = Search.session( entityManager ).search( Manager.class )
        .where( f -> f.match()
                .field( "name" )
                .matching( "james" ) )
        .loading( o -> o.graph( "preload-associates", GraphSemantic.FETCH ) )
        .fetchHits( 20 );

for ( Manager manager : hits ) {
    // This does not trigger a SELECT: the association was eagerly loaded.
    List<Associate> associates = manager.getAssociates();
    // ...
}

See this section of the documentation for more information.

@Indexed is now inherited by default

As of HSEARCH-1231, as soon as an entity is @Indexed, all of its extending entities will be indexed too, by default. This behavior should be less surprising to new users.

If you really need an entity to be indexed and not one of its extending entities, you can disable indexing for the extending entity manually using @Indexed(enabled = false).

See this section of the documentation for more information.

Version upgrades

Hibernate Search 6 requires ORM 5.4.4.Final or later to work correctly. Earlier 5.4.x versions will not work correctly.

Backward-incompatible changes

  • HSEARCH-3922: API methods no longer use a "get"/"set" prefix. For example SearchResult.getHits() is now simply SearchResult.hits(). Older versions of methods with the "get"/"set" prefix are still available for now, but have been deprecated and will be removed before Hibernate Search 6.0.0.Final is released.

  • HSEARCH-3097: @IndexedEmbedded.name should be used instead of @IndexedEmbedded.prefix. The main difference is that name does not accept dot-separated paths, a prefix or an empty path: it just defines the name of an object field. @IndexedEmbedded.prefix is still available for now, but has been deprecated and will be removed in a future major version.

  • HSEARCH-3913: @FullTextField.aggregable has been removed because it didn’t do anything. If you need both full-text search and sorts/aggregations on a given property, create two fields: one with @FullTextField(analyzer = …​) and the other with @KeywordField(sortable = Sortable.YES, aggregable = Aggregable.YES).

  • HSEARCH-3928: PropertyMappingIndexedEmbeddedStep#extractors() (no parameters) has been renamed to noExtractors().

Documentation

No significant documentation changes apart from those related to new features.

Other improvements and bug fixes

  • HSEARCH-3072: @IndexedEmbedded.targetType is now available, with similar functionality to targetElement in Hibernate Search 5.

  • HSEARCH-962: Entity loading will now execute multiple queries to respect the configured fetch size, even when the document ID is mapped to a property that is not the entity ID. This will allow working around limitations of some databases which put limits on the total amount of query parameters.

  • HSEARCH-3584: Hibernate Search will now correctly retrieve data from properties defined in mapped superclasses or entity superclasses when "extended" bytecode enhancement (replacing access to public fields) is enabled.

And more. For a full list of changes since the previous releases, please see the release notes.

How to get this release

All details are available and up to date on the dedicated page on hibernate.org.

Feedback, issues, ideas?

To get in touch, use the following channels:

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