org.hibernate.AnnotationException: mappedBy reference an unknown target entity property

[peter kosmas]

Hello ...
I have a problem by mapping these two tables

i want the keys that are mapped not to be generated...
but to be entered manually ..
I am new to JPA and trying some examples ...
Can someone help ???

Create a row with isbn xx
and insert by that isbn 1-2-3 Instances with data by that isbn
the problem is i get the exception :

Exception in thread "main" org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: jpa.beans.BookInfo.bookInfo in jpa.beans.Book.bookInfo
at org.hibernate.cfg.annotations.CollectionBinder.bindStarToManySecondPass(CollectionBinder.java:576)

So i use this example and get

  /*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package jpa.beans;

import java.util.List;
import javax.persistence.CascadeType;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.Id;
import javax.persistence.OneToMany;

/**
 *
 * @author panos
 */
@Entity
public class Book {


private String isbn;
private String title;
private List<BookInfo> bookInfo;
    
    @OneToMany(mappedBy="bookInfo",targetEntity=BookInfo.class,fetch=FetchType.EAGER,
    cascade=CascadeType.ALL)
    public List<BookInfo> getBookInfo() {
        return bookInfo;
    }
    
    public void setBookInfo(List<BookInfo> bookInfo) {
        this.bookInfo = bookInfo;
    }

    @Id
    public String getIsbn() {
        return isbn;
    }

    public void setIsbn(String isbn) {
        this.isbn = isbn;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }


}
  

 /*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

package jpa.beans;

import java.util.Calendar;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
/**
 *
 * @author panos
 */
@Entity
public class BookInfo {
private String id;

    @Id
    @GeneratedValue
    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }



private String isbn;
private String summaryText;
private String text;
private int authorId;
private int divisionId;
private Book book;
  
    @ManyToOne
    @JoinColumn(name="isbn")


    public Book getBook() {
        return book;
    }

    public void setBook(Book book) {
        this.book = book;
    }
@Temporal(TemporalType.DATE)
private java.util.Calendar datePublished;

    public int getAuthorId() {
        return authorId;
    }

    public void setAuthorId(int authorId) {
        this.authorId = authorId;
    }
    @Temporal(TemporalType.DATE)
    public Calendar getDatePublished() {
        return datePublished;
    }

    public void setDatePublished(Calendar datePublished) {
        this.datePublished = datePublished;
    }

    public int getDivisionId() {
        return divisionId;
    }

    public void setDivisionId(int divisionId) {
        this.divisionId = divisionId;
    }

    public String getIsbn() {
        return isbn;
    }

    public void setIsbn(String isbn) {
        this.isbn = isbn;
    }

    public String getSummaryText() {
        return summaryText;
    }

    public void setSummaryText(String summaryText) {
        this.summaryText = summaryText;
    }

    public String getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }
}
   

import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;

import jpa.beans.Book;
import jpa.beans.BookInfo;
import org.hibernate.SessionFactory;

import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.classic.Session;

import org.hibernate.tool.hbm2ddl.SchemaExport;

  public class TestJPA {
public static void main(String[] args) throws ParseException{
    AnnotationConfiguration config=new AnnotationConfiguration();
    config.addAnnotatedClass(Book.class);
    config.addAnnotatedClass(BookInfo.class);
    config.configure();
     SessionFactory factory =config.buildSessionFactory();
    // new SchemaExport(config).create(true, true);
     Session session=factory.getCurrentSession();
     session.beginTransaction();

    Book d=new Book();
     BookInfo info=new BookInfo();
   session.save(d);
     session.save(info);
     

    d.setIsbn("ISBN220000");
    d.setTitle("TEST 7nth Edition");
   
    info.setAuthorId(1);
    info.setIsbn("ISBN220000");
    info.setDatePublished(new java.util.GregorianCalendar());
    info.setDivisionId(1);
    info.setSummaryText("test");
    info.setText("test");
    info.setBook(d);
    

   //  d.setImagePath("complete.jpg");
    // d.setDaterow(new java.util.GregorianCalendar());




    // session.saveOrUpdate(d);
     session.getTransaction().commit();

}
}
 

[Shannon McGee]

Hi Peter,

I would start by removing the "mappedBy" annotation from the getBookInfo method. You shouldn't need any additional annotations for this relationship

This annotation is typically used to map the reverse side of a relationship that has already been captured in another class.

A side note: you may find that it's easier to put the attribute annotations above each attribute declaration. I didn't see anything in your code that would necessitate using the annotations at the method level.

-Shannon