-----Original Message-----
>From: S�bastien Dumais [mailto:[EMAIL PROTECTED]]
>Sent: Friday, August 03, 2001 9:45 PM
>To: [EMAIL PROTECTED]
>Subject: Re: [castor-dev] Many-Many relation problems
>
>Hi Carlos,
>
> I've traced down the problem in
>org.exolab.castor.persist.ClassMolder.create (line 991) method
>(see
>http://virtuals.intalio.com/cgi-bin/cvsweb.cgi/castor/src/main/org/exolab/c
a
>stor/persist/ClassMolder.java?annotate=1.54&cvsroot=castor&only_with_tag=ta
g
>_0_9_3). At this point, from my
>understanding, the variable "oo" contains the value of a "Videoformat" in
my
>example and we need to check if it is persistent.
>But since the identity of this object is already known (we set the "uid"
>field), then this field is not persistent (tx.isPersistent(oo) is false).
I don't think the result of tx.isPersistent( oo ) depend on if identity of
the object is set all not.
"Tx.isPersistent()==true" means the transaction context knows about the
object, and the object is not deleted.
Anyway, why don't you try the cvs version?
> To solve this problem, I removed the condition "tx.isPersistant(oo)" to
>force the persistence of "oo". In that case, the relation is
>always written even if we already know the identity of "Videoformat".
If for some reasons (or maybe a bug) cause tx.isPersistent() to returns the
invalid value, make the relationship to be created anyway might solve your
problem for your specific case. But, I can't agree with your reasoning.
> As for
>the exception thrown while loading, I've found that it was
>caused by my using accentuated characters in the database field that are
not
>compatible with UTF-8. The moment I changed the
>accents for characters entities (é for �), everything was right.
Cool
> If someone knows that I've done something wrong by removing the
>condition or if there is a better way to handle this, let
>me know.
Try the cvs.
>Good day
Good weekend. :-P
Thomas
>S�bastien Dumais
>
>----- Original Message -----
>From: "Carlos Illana" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>Sent: Friday, August 03, 2001 2:06 AM
>Subject: Re: [castor-dev] Many-Many relation problems
>
>
>> Hi Dumais,
>>
>> I have the same problem but the list has not give me an answer.
>> I get the the entry in the m:n relation table added when both objects are
>> new, but when I try to relate the object with objects already in the
>> database the record in the relation table is not added.
>>
>> Maybe Castor development team can give us an answer.
>>
>> Regards,
>> Carlos
>>
>> > Hi all,
>>
>> > I've been using Castor for some time to map a complex set of
>> objects
>> > but I've stumbled across
>> > a problem with a many-many relation. The problem I have is that when I
>> > create a new "Movie" object
>> > and I add a "Videoformats" to it, Castor does not add the entry in the
>> > relation table "videoformat_list".
>>
>> > When I remove the condition tx.isPersistant in ClassMolder
>> > (org.exolab.castor.persist.ClassMolder:915),
>> > the entry is added but when I try loading a "Movie" back, I get this
>> > exception:
>> >
>> > --
>> > org.exolab.castor.jdo.PersistenceException: Object, Title@7ca8, links
to
>> > another object, Movie@7808b9 that is not loaded/updated/created in this
>> > transaction
>> > --
>>
>> > I don't really understand what that means and how to make this m-n
>> > relation work.
>>
>>
>>
>> > The mapping is:
>>
>> > <mapping>
>> > <!-- class declaration for Category here -->
>>
>> > <class identity="uid" name="Videoformats">
>> > <description>Describes a videoformat</description>
>> > <map-to table="videoformats"/>
>>
>> > <field name="uid" type="integer">
>> > <description>Primary Key</description>
>> > <sql name="uid" type="integer"/>
>> > </field>
>>
>> > <field name="videoformatDescription" type="VideoformatDescription"
>> > collection="vector" required="true">
>> > <description></description>
>> > <sql many-key="videoformat"/>
>> > </field>
>> > </class>
>>
>> > <class identity="lang content" name="VideoformatDescription">
>> > <description></description>
>> > <map-to table="videoformats_desc"/>
>>
>> > <field name="lang" type="java.lang.String">
>> > <sql name="lang" type="varchar"/>
>> > </field>
>>
>> > <field name="content" type="java.lang.String">
>> > <sql name="description" type="varchar"/>
>> > </field>
>> > </class>
>>
>> > <class identity="uid" name="Movie" key-generator="uidgen">
>> > <map-to table="movies"/>
>>
>> > <!-- some removed for sake of brievety -->
>>
>> > <field name="uid" type="java.lang.String">
>> > <description>Primary Key for Titles table</description>
>> > <sql name="uid" type="integer"/>
>> > </field>
>>
>> > <!-- ********************** 1-N relation, works fine
>> > ********************************** -->
>> > <field name="category" type="com.dvdsoon.ebeans.title.Category"
>> > required="true">
>> > <description>The category of this movie</description>
>> > <sql name="category"/>
>> > </field>
>> > <!--
>> >
>>
**************************************************************************
>> *******
>> > -->
>>
>> > <!-- *********************** M-N relation, that's the
>> > trouble************************* -->
>> > <field name="videoformats"
>> > type="com.dvdsoon.ebeans.title.Videoformats" collection="vector"
>> > required="true">
>> > <description>Videoformats of this movie</description>
>> > <sql many-table="videoformat_list" many-key="movie"
>> > name="videoformat"/>
>> > </field>
>> > <!--
>> >
>>
**************************************************************************
>> ********
>> > -->
>>
>> > <field name="version" type="integer">
>> > <description>The version number of this entry</description>
>> > <sql name="version_number" type="integer"/>
>> > </field>
>>
>> > </class>
>> > </mapping>
>>
>> > Thank you in advance for your time..
>>
>>
>> > S�bastien Dumais
>>
>> > -----------------------------------------------------------
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