[Hibernate] urgent!!!!! one-to-one cascade problem

dosapati Thu, 30 Oct 2003 14:28:17 -0800

Hi,

Please someone look into this and please tell me what I am doing wrong here.

I tried one-to-one in 2 ways:

In two cases, I wrote the mapping file then I generated java classes and

DB schema for MySQL. Then wrote the usecase. And here I am giving the results

I got when I executed the usecase.

I CASE

-----------------------------------------------------------------------------------------------------------------------

Mapping

-------------

<hibernate-mapping>
<import class="onetoone.Recurrence" rename="recurrence"/>
<class name="onetoone.Recurrence" table="recurrence">
<id name="recurrenceId" column="recurrence_id" unsaved-value="0" type="long">
<generator class="identity"/>
</id>
<one-to-one name="pattern" class="onetoone.Pattern" cascade="all"/>
<property name="name" column="name" type="string"/>
</class>

Usecase

------------

   Recurrence rec = new Recurrence();
   Pattern pattern = new Pattern();
   pattern.setRecurrenceCount(23);
   rec.setName("test");
   rec.setPattern(pattern);
   session.save(rec);

Results

----------

recurrence record getting saved. But no details are getting saved in pattern.

The generated SQL queries:

insert into recurrence (name) values (?)
SELECT LAST_INSERT_ID()

II CASE

-----------------------------------------------------------------------------------------------------

Here I made the relation bi-directional.

Class Mapping

---------------------

<hibernate-mapping>
<class name="onetoone2.Recurrence" table="recurrence">
<id name="recurrenceId" column="recurrence_id" unsaved-value="0" type="long">
<generator class="identity"/>
</id>
<one-to-one name="pattern" class="onetoone2.Pattern" cascade="all"/>
<property name="name" column="name" type="string"/>
</class>

Usecase

-------------

   Recurrence rec = new Recurrence();
   Pattern pattern = new Pattern();
   pattern.setRecurrenceCount(23);
   rec.setName("test");
   pattern.setRecurrence(rec);
   rec.setPattern(pattern);
   session.save(rec);

Results

----------
recurrence record is getting saved. and pattern record is also getting saved. but

recurrence_id is not getting saved in the pattern table.

insert into recurrence (name) values (?)
SELECT LAST_INSERT_ID()
insert into pattern (recurrence_count, recurrence_id) values (?, ?)

Can anyone please tell me if I am doing anything wrong. What is the correct way

to map one-to-one relation. How can I save the identity in the second-level entity?.

Thanks in advance.

dosapati

[Hibernate] urgent!!!!! one-to-one cascade problem

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