thank you but
1) does not work, the behaviour is just the same, the bId is still set to 0
in table A
2) i don't want to rely on "client" code to persist my business model :
when the model will get more complex, "simple" solutions like that won't
be feasible/working
by the way :
i think it strange that the _same_ code works in castor 0.8.11
(i know a lot of rewriting has been done, but i can't imagine nobody needing
this kind of behaviour)
by the way 2 : it seems to me, since solution 2) "works" that it's just some
kind of a bug
just as if jdoBeforeCreate() was actually called _after_ the create...
which would explain why only the bId is not correctly set in database
anyway thanks again for your help
David
----- Original Message -----
From: "Ebersole, Steven" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Tuesday, March 05, 2002 7:01 PM
Subject: Re: [castor-dev] simple relation
> Two ways to correct:
> 1) Define b as "dependent" on a; this is done in the mapping file and is
> pretty well documeneted (see FAQs);
> 2) Change the client code to the following:
> b = new B();
> b.setTitle("some title");
>
> db.create(b); // <- Add this line.................................
>
> a = new A();
> a.setB(b);
> db.create(a);
>
>
>
>
>
> ********************************************
> Steve Ebersole
> IT Integration Engineer
> Vignette Corporation
> 512.741.4195
>
> Visit http://www.vignette.com
>
> ********************************************
>
>
> -----Original Message-----
> From: David Rault [mailto:[EMAIL PROTECTED]]
> Sent: Tuesday, March 05, 2002 11:32 AM
> To: [EMAIL PROTECTED]
> Subject: [castor-dev] simple relation
>
>
> hi everybody
>
> i used to 'play' with castor 0.8.11
> and i'm currently trying to update my skills with newer versions (0.9.3.9,
> 0.9.3.13 and latest cvs)
>
> my problem is a very simple relation that works with 0.8.11 does not work
> with the previously named versions
> actually it partly works, and that's my problem, i don't see why it
behaves
> that way :
>
> i (quickly) searched the mailing-list archive but saw nothing matching...
>
> i'v got a my generic super class for persistent objects : Super
> i've got 2 subclasses : A and B
> A has a field of type B
>
> here is the code :
>
> ******************************
> public class Super implements Persistent {
> private transient Database _database;
> private int id;
> public int getId() {
> return id;
> }
> public void setId(int id) {
> this.id = id;
> }
> public Super() {
> super();
> }
> public void jdoPersistent(Database db) {
> setDatabase(db);
> }
> /*
> the other methods of Persistent are defined empty
> not shown here for lisibility
> */
> protected Database getDatabase() {
> return _database;
> }
> protected void setDatabase(Database database) {
> _database = database;
> }
> /** for backward compatibility with castor 0.8.11 */
> public void jdoCreate() throws Exception {
> jdoBeforeCreate(getDatabase());
> }
> }
> ******************************
> public class A extends Super {
> private B b;
> public A() {
> super();
> }
> public B getB() {
> return b;
> }
> public void setB(B b) {
> this.b = b;
> }
> public void jdoBeforeCreate(Database db) throws Exception {
> if (getB() != null) {
> if (getB().getId()==0) {
> db.create(getB());
> } else {
> db.update(getB());
> }
> }
> }
> }
> ******************************
> public class B extends Super {
> private String title;
> public B() {
> super();
> }
> public String getTitle() {
> return title;
> }
> public void setTitle(String title) {
> this.title = title;
> }
> }
> ******************************
>
> my mapping looks like this :
> ******************************
> <?xml version="1.0"?>
> <!DOCTYPE mapping PUBLIC "-//EXOLAB/Castor Mapping DTD Version 1.0//EN"
> "http://castor.exolab.org/mapping.dtd"; >
> <mapping>
> <key-generator alias="mykeygen" name="MAX"></key-generator>
> <class access="shared" identity="id"
> name="com.sysdeo.persistence.castor.test.Super" key-generator="mykeygen">
> <map-to table="super" xml="super"/>
> <field direct="false" lazy="false" name="id" required="true"
> type="integer">
> <sql dirty="check" name="id" type="integer"/>
> </field>
> </class>
> <class access="shared" identity="id"
> name="com.sysdeo.persistence.castor.test.A" key-generator="mykeygen"
> extends="com.sysdeo.persistence.castor.test.Super">
> <map-to table="a" xml="a"/>
> <field direct="false" lazy="false" name="id" required="true"
> type="integer">
> <sql dirty="check" name="id" type="integer"/>
> </field>
> <field name="b" direct="false" lazy="false" required="false"
> type="com.sysdeo.persistence.castor.test.B">
> <sql dirty="ignore" name="bId" />
> </field>
> </class>
> <class access="shared" identity="id"
> name="com.sysdeo.persistence.castor.test.B" key-generator="mykeygen"
> extends="com.sysdeo.persistence.castor.test.Super">
> <map-to table="b" xml="b"/>
> <field direct="false" lazy="false" name="id" required="true"
> type="integer">
> <description>l'identifiant de tout objet</description>
> <sql dirty="check" name="id" type="integer"/>
> </field>
> <field name="title" direct="false" lazy="false" required="false"
> type="string">
> <description>le titre de l'objet</description>
> <sql dirty="check" name="title" type="varchar"/>
> </field>
> </class>
> </mapping>
> ******************************
>
> the id field is set by the key generator (here is a simple MAX algorithm
but
> i've got the same problem with
> MySQL IDENTITY)
>
> ******************************
> and finally here is what i try :
>
> b = new B();
> b.setTitle("some title");
> a = new A();
> a.setB(b);
> db.create(a);
> ******************************
>
> both 'a' and 'b' are persisted BUT the bId in 'a' is set to 0 in the
> database
> whereas the id of 'b' is set correctly in the B table
>
> what have i missed ?
>
> one constraint is that i don't want a reference to 'a' in 'b'
> (only 'a' knows about 'b')
> i've also tried to remove the common superclass (in case that would be
some
> locking for the id generation) : not better
>
> thanks a lot for your help, i hope i gave enough details of my case
>
> David
>
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