Bu test projesi ile ilk kez bir hazırda bekletme uygulaması ile JPA kurmaya çalışıyorum. şu hata Ran: Ben herhangi oluşturmadığınızdanorg.hibernate.AnnotationException: @OneToOne veya @ManyToOne üzerinde entities.Ques # tion.examId bilinmeyen bir varlığı referanslar: uzun
<?xml version="1.0" encoding="UTF-8"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd"
version="2.0">
<persistence-unit name="ExamModulePu"
transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<class>entities.Exam</class>
<class>entities.Question</class>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<properties>
<property name="javax.persistence.jdbc.driver" value="com.mysql.jdbc.Driver" />
<property name="javax.persistence.jdbc.url" value="jdbc:mysql://localhost:3306/exammoduledb" />
<property name="javax.persistence.jdbc.user" value="root" />
<property name="javax.persistence.jdbc.password" value="root" />
<property name="hibernate.hbm2ddl.auto" value="create" />
</properties>
</persistence-unit>
</persistence>
:
@Entity
public class Exam implements Serializable {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
private String name;
private int numQuestions;
private int minutesAllotted;
private Date startDate;
private Date endDate;
@OneToMany(mappedBy = "examId", orphanRemoval = true)
private List<Question> questionList;
// Getters and setters here..
}
@Entity
public class Question implements Serializable{
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private long id;
@ManyToOne
private long examId;
private int points;
private int timeLimit;
private String text;
private String category;
@Embedded
private List<Answer> answerList;
}
@Embeddable
public class Answer implements Serializable {
private int optionNumber;
private String text;
private boolean correct;
}
Bu gibi benim persistence.xml görünür:
Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: ExamModulePu] Unable to build EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:924)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:899)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:59)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:63)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:47)
at service.tests.ExamServiceTest.main(ExamServiceTest.java:18)
Caused by: org.hibernate.AnnotationException: @OneToOne or @ManyToOne on entities.Question.examId references an unknown entity: long
at org.hibernate.cfg.ToOneFkSecondPass.doSecondPass(ToOneFkSecondPass.java:109)
at org.hibernate.cfg.Configuration.processEndOfQueue(Configuration.java:1536)
at org.hibernate.cfg.Configuration.processFkSecondPassInOrder(Configuration.java:1457)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1365)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1756)
at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:96)
at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:914)
Bunlar benim varlıklardır tablolar, ancak bunun yerine hibernate.hb2mddl.auto
bağlıyım. Ama inanıyorum ki hatam, ısrarcı birimin üretilememesi nedeniyle gerçekleşmeden önce yayılıyor. Yanlış yaptığım herhangi bir fikrin var mı? Ben verdiğimden emin size stacktrace yakından bakarsanız sadece javax.persistence.*;
urgroon @ urffeJunky nedir? – sisimh
Onun önerisi, yalnızca "org.hibernate.annotations.Entity" yerine "javax.persistence.Entity" ifadesini almaktır. –
Bu, programım için geçerli değil ama hala hata veriyor – Avdhut