[hibernate-issues] [Hibernate-JIRA] Created: (HHH-2612) Null foreign key results in Transient Object Exception

[maxtor (JIRA)]

Null foreign key results in Transient Object Exception
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                 Key: HHH-2612
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2612
             Project: Hibernate3
          Issue Type: Bug
          Components: query-hql
         Environment: Hibernate version 3.2 cr3, Oracle 8i
            Reporter: maxtor
            Priority: Blocker


Two tables A and B where B is parent table and the relation between A and B is unidirectional many-to-one. 

mapping for A: 

<hibernate-mapping package="parms"> 
<class name="A" table="A" lazy="true" batch-size="20" select-before-update='true' > 
<id name="id" column="ID"> 
<generator class="increment"/> 
</id> 
<many-to-one name="b" column="Ba_ID" class="B" not-found="ignore" cascade="none" lazy="false" not-null="false" unique="false" /> 
<property name="place" column="PLACE"/> 
</class> 

mapping for B: 

<class name="B" table="B" lazy="true" batch-size="10" select-before-update="true"> 
<cache usage="read-write"/> 
<id name="id" column="B_ID" > 
<generator class="assigned"/> 
</id> 
<property name="programId" column="GROUP_ID" unique="true"/> 
</class> 

 Also some of rows of table A have null values for column Ba_ID. 
Now retrieval of these rows which have null values for column Ba_ID works fine. And it retrieves a null relationship between the tables for these rows. Now when I try to update column PLACE. It tries to update column Ba_ID also and there it throws a TransientOBjectException. 
But nothing is being changed for that column. Also cascade is set to "none".
 
 Transaction scope code   
  
A a=_form.getA(id); 
a.setPlace("place"); 
sess.saveOrUpdate(a); 
tx.commit(); 
sess.close(); 

And the last SQL statement being tried to be executed is: 
UPDATE A set ......(all columns )..... where ID =? 


And the exception thrown is: 

[ERROR] AbstractFlushingEventListener - -Could not synchronize database state with session <org.hibernate.TransientObjectException: B> 
at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:219) 
 


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