@SortableField 在嵌套实体中不起作用

Question

我的代码具有类 Credenciada，它继承自具有 CEP 类型的属性（嵌套类）“cep”的类 Cadastro。 CEP 类具有 String 类型的属性“uf”。

uf 属性是用@SortableField 注释的，所以索引是用“cep.uf”名称保存的。但是当我需要按“cep.uf”排序时，会抛出 NullPointerException，因为 Hibernate-search 没有找到这个索引/属性。

OBS：我看到类 IndexedTypeDescriptorImpl 的属性“allFieldDescriptors”没有“cep.uf”ocurrency。因为在此方法的第 139 行中，此时“return allFieldDescriptors.get(fieldName)”返回 null。

Cadastro.java：

@Entity
@Table(name = "CAD")
@Inheritance(strategy = InheritanceType.JOINED)
@Indexed
public class Cadastro extends Entidade<Long> {
    @Id
    private Long codigo;

    @IndexedEmbedded
    @NotAudited
    @ManyToOne
    private CEP cep;

    //more attrs and getters/setters here
}

Credenciada.java：

@Entity
@Indexed
@Table(name = "CAD_CRDC")
@PrimaryKeyJoinColumn(name = "CD_CAD_CRDC")
public class Credenciada extends Cadastro {

    //many attrs and getters/setters here

}

CEP.java

@Entity
@Table(name = "CAD_CEP", schema = "dne")
public class CEP extends Entidade<Long> {

   @Id
   @Field(name = "cep", store = Store.YES)
   private Long nrCep;

   @SortableField
   @Field(store = Store.YES)
   private String uf;

}

搜索代码：

FullTextEntityManager fullTextEntityManager = hibernateUtil.getFullTextEntityManager();

QueryBuilder qb = HibernateSearchUtil.createQueryBuilder(fullTextEntityManager, Credenciada.class);     

BooleanJunction<?> criterios = qb.bool();

//many conditions here...

org.apache.lucene.search.Query rootQuery = criterios.isEmpty() ? new MatchAllDocsQuery() : criterios.createQuery();

FullTextQuery query = fullTextEntityManager.createFullTextQuery(rootQuery, Credenciada.class);

query.setSort(qb.sort().byField("cep.uf").createSort());

List resultList = query.getResultList();

例外：

java.lang.NullPointerException
    at org.hibernate.search.query.dsl.sort.impl.SortFieldStates.getCurrentSortFieldTypeFromMetamodel(SortFieldStates.java:156)
    at org.hibernate.search.query.dsl.sort.impl.SortFieldStates.determineCurrentSortFieldTypeAutomaticaly(SortFieldStates.java:149)
    at org.hibernate.search.query.dsl.sort.impl.ConnectedSortContext.byField(ConnectedSortContext.java:42)
    at br.gov.sindec.modulos.credenciada.repositorio.impl.CredenciadaRepositorioImpl.criarQueryListarCredenciadasIndexadas(CredenciadaRepositorioImpl.java:124)
    at br.gov.sindec.modulos.credenciada.repositorio.impl.CredenciadaRepositorioImpl.listarCredenciadasIndexadas(CredenciadaRepositorioImpl.java:52)

Answer 1

Hibernate Search 5.6.1.Final and 5.7.0.Final have just been released;这两个版本都包含针对您的问题的修复 (HSEARCH-2587)。