hiberner comment créer createalias gauche rejoindre?

Question

@Entity 
@Table(name = "BOOKTEST") 
@NamedQueries({@NamedQuery(name = "Booktest.findAll", query = "SELECT b FROM Booktest b"), @NamedQuery(name = "Booktest.findById", query = "SELECT b FROM Booktest b WHERE b.id = :id"), @NamedQuery(name = "Booktest.findByBookName", query = "SELECT b FROM Booktest b WHERE b.bookName = :bookName")}) 
public class Booktest implements Serializable { 
@ManyToOne 
    private Topictest topictestId; //foreign key 
    @JoinColumn(name = "USERTEST_ID", referencedColumnName = "ID") 
    @ManyToOne 
    private Usertest usertestId; //foreign key 
} 

lorsque i exécute

session.createCriteria (Booktest.class) .createAlias ​​("usertestId", "usertestId", Criteria.LEFT_JOIN) .list();

la SQL_log montrant encore select * from booktest, usertest plutôt que select * de gauche booktest rejoindre usertest comment faire se joindre à gauche?

essayé non Sequitor les deux cas, et je reçois toujours en dessous sans « se joindre à gauche »

Hibernate: select this_.ID as ID13_2_, this_.BOOK_NAME as BOOK2_13_2_, this_.TOP 
ICTEST_ID as TOPICTEST4_13_2_, this_.USERTEST_ID as USERTEST3_13_2_, usertestid1 
_.ID as ID14_0_, usertestid1_.TOPIC_NAME as TOPIC2_14_0_, usertest4_.ID as ID15_ 
1_, usertest4_.USER_NAME as USER2_15_1_ from BOOKTEST this_, TOPICTEST usertesti 
d1_, USERTEST usertest4_ where this_.TOPICTEST_ID=usertestid1_.ID and this_.USER 
TEST_ID=usertest4_.ID(+) 

Answer 1

Essayez cette

session.createCriteria(BookTest.class) 
      .createAlias("topictestId", "usertestId") 
      .setFetchMode("topictestId",FetchMode.EAGER) 
      .list(); 

En théorie, cela devrait fonctionner, sinon essayer sans aliasing .

Answer 2

Cette dernière fonction est supprimée dans la nouvelle version d'Hibernate. https://docs.jboss.org/hibernate/orm/5.0/javadocs/org/hibernate/FetchMode.html utilisation FetchMode.JOIN vous remercie