Hi,
I have many-to-one association betwen BOOK and PUBLISHER entities.
when i try to save the association a hibrnate exception appear :

org.hibernate.PropertyValueException: not-null property references a null or transient value: tn.com.smartsoft.hibernate.beans.Book.publisher



PUBLISHER mapping file :

<!-- Publisher mapping -->
<hibernate-mapping>
<class name="tn.com.smartsoft.hibernate.beans.Publisher" table="publisher" catalog="bookshopdb">
<id name="publisherId" type="java.lang.Long">
<column name="PUBLISHER__ID" default="100" />
<generator class="increment" />
</id>
<property name="code" type="java.lang.String">
<column name="CODE" length="25" not-null="true" unique="true" />
</property>
<property name="publisherName" type="java.lang.String">
<column name="PUBLISHER_NAME" length="25" />
</property>
<property name="address" type="java.lang.String">
<column name="ADDRESS" length="75" />
</property>

<set name="books" inverse="true" cascade="all">
<key>
<column name="PUBLICHER_ID" />
</key>
<one-to-many class="tn.com.smartsoft.hibernate.beans.Book" />
</set>

</class>


BOOK mapping file :


<hibernate-mapping>
<class name="tn.com.smartsoft.hibernate.beans.Book" table="book" catalog="bookshopdb">
<id name="bookId" type="java.lang.Long">
<column name="BOOK_ID" />
<generator class="native" />
</id>
<property name="isbn" type="java.lang.String">
<column name="ISBN" length="20" not-null="true" unique="true" />
</property>
<property name="bookName" type="java.lang.String">
<column name="BOOK_NAME" length="225" />
</property>
<property name="publishDate" type="java.util.Date">
<column name="PUBLISH_DATE" length="10" />
</property>
<property name="price" type="java.lang.Long">
<column name="PRICE" precision="10" scale="0" />
</property>
<many-to-one name="publisher" class="tn.com.smartsoft.hibernate.beans.Publisher" lazy="proxy" cascade="save-update" fetch="join">
<column name="PUBLICHER_ID" not-null="true" />
</many-to-one>
<set name="chapters" inverse="true">
<key>
<column name="BOOK_ID" not-null="true" />
</key>
<one-to-many class="tn.com.smartsoft.hibernate.beans.Chapter" />
</set>
</class>
</hibernate-mapping>



i have tried to execute the following code but a hibernate exception was thrown:

Book book = new Book();
book.setBookName("My BOOK1");
book.setIsbn("123456");
book.setPrice(Long.valueOf(10));

Publisher publisher = new Publisher();
publisher.setCode("18");
publisher.setPublisherName("Publisher1");
book.setPublisher(publisher);

Session session = HibernateSessionFactory.currentSession();
Transaction tx = session.beginTransaction();
session.saveOrUpdate(book);
tx.commit();
session.close();

the Hibernate Exception

org.hibernate.PropertyValueException: not-null property references a null or transient value: tn.com.smartsoft.hibernate.beans.Book.publisher


regards,

Try calling "saveOrUpdate" on publisher instead of book.

thank you NEWBIE for response
i have tried to saveOrUpdate(publisher) instate of book
a new row is added in the publisher table but book entity was not inserted in database.

s you can see hibernate generate the following queries :

Hibernate: select max(PUBLISHER__ID) from publisher
Hibernate: insert into bookshopdb.publisher (CODE, PUBLISHER_NAME, ADDRESS, PUBLISHER__ID) values (?, ?, ?, ?)

regards,

Also add the following:

thank you Newbie it work corectly now!

By the way, I am r, not newbie :)

so sorry thank agin you r.
it's clear you aren't a Newbie because you have an advance knowledge
regards,