I have identified a similiar problem in thread "Re: [castor-dev] New child
objects in m:n relation not created in Persistent storage when creating new
parent + more errors"
I think it may be a bug. I am awaiting a response from Thomas to see what he
makes of it.
It could be something to do with the UUID generator, as the problem goes
away if I set no key-gen and assign my own identifiers before creating in
persistent storage.
Bert.
----- Original Message -----
From: "Eduard Mossinkoff" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, January 21, 2002 4:53 AM
Subject: [castor-dev] Object reference not made persistent.
> Howdy
>
> I have reduced the problem I experience to the bare essentials. Let me
> elaborate.
> Two simple classes called 'A' and 'B'. Both classes have an 'id' of type
> String. The 'id' is generated by the UUID key-generator. I can persist
> instances of 'A' and 'B' without problems.
> Now 'B' has a reference to 'A' and therefor 'B' depends on 'A'. Type 'B'
> has a property called 'a' of type 'A'.
> If, in a single transaction, I create an instance of 'A', called 'a1'
> and an instance of 'B', called 'b1'. Then 'b1' receives a reference to
> 'a1'. The transaction is committed and without problems so far.
>
> Now, I want to have a new instance of type 'B', called 'b2' associated
> with the persistent instance 'a1' of type 'A'. I retrieve 'a1' from the
> database and associate 'b2' with 'a1'. The assertions in my TestSuite
> assures me that 'b1.a' is referring to 'a1'. Then when the transaction
> is committed, a NULL is inserted for the property 'a' which holds a
> reference to 'a1'. Instead of storing the 'id' of 'a1', a NULL is
> inserted.
>
> The problem is derived from a larger complex meta-model repository, so I
> leave out all the irrelevant bits and pieces.
>
> It would be great if someone can help me out. Is it my understanding or
> really a bug, that is what I would like to know.
> Thanks,
> Eduard.
>
>
> _________
> class A {
> public String id;
> ..
> }
>
> class B {
> public String id;
> public A a;
> ..
> }
>
> create table A (
> id varchar(30) not null,
> primary key ( id )
> );
>
> create table B (
> id varchar(30) not null,
> a_id varchar(30) not null,
> primary key ( id ),
> foreign key (a_id) references A (id)
> );
>
>
> <class name="A" identity="Id" key-generator="UUID">
> <map-to table="A" xml="A" />
> <field name="id" required="true" direct="true">
> <sql name="id" />
> <bind-xml name="id" node="attribute"/>
> </field>
> </class>
>
> <class name="B" identity="Id" key-generator="UUID">
> <map-to table="B" xml="B" />
> <field name="id" required="true" direct="true">
> <sql name="id" />
> <bind-xml name="id" node="attribute"/>
> </field>
> <field name="a" type="A" required="true" direct="true">
> <sql name="a_id" dirty="check" />
> <xml name="a" node="element" />
> </field>
> </class>
>
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