Re: [Andromda-user] how to specify max_fetch_depth for hibernate

[Carlos Cuenca]

Hi, first of all, currently hibernate cartridge is not mapping compositions (as they should be done with the "component" element... the good news about this, is that I plan to do before March 14th). On the other hand, and based on the information you give on the mail, I think that the cartridge is doing what it is supposed to do, let me explain it: When there is a one to one association, the cartridge will map the relation with a <one-to-one> element on one side, and a <many-to-one> on the other. Hibernate cartridge decides where to use <one to one> or <many to one>, if one of the sides is declared primary. Here is an extract of the templates: #if ($sourceEnd.one2One) #if ($sourceEnd.one2OneSecondary)         <one-to-one name="$otherEnd.name"  ...... #else #if($sourceEnd.one2OnePrimary)         <many-to-one name="$otherEnd.name" .....             <column name="$otherEnd.columnName"/>         </many-to-one> #else         <one-to-one name="$otherEnd.name" ....... #end #end Secondary means: the foreign key is not specified on this one-to-one association within the hibernate one-to-one mapping. Primary means:  it will be the one containing the foreign key column definition. (the other end contains the Aggregation or composition) Also lazy attribute should not be mapped any of these sides (please refer to hibernate-mappings dtd). I hope this can help you regards Carlos Wouter Zoons wrote: you're right, it should be a one-on-one .. the foreign key should not be there strange indeed, I'm using the same construct in my own models and it's working fine .. perhaps this bug has been introduced last night ? Carlos, could you verify Bernard's issue too ? I'm reluctant to update from the Maven repo because I'm in a critical phase in my project. thanks -- Wouter Thank you for the MaxFetchDepth pointer. Now for the aggregation/composition issue, I am well aware that setting an association's type to "composition" will eagerly load its dependent objects, unless you specify it to be lazy explicitely using a tag value. ok, I have an association between a User entity and a Rolodex Entity. It is a composition, which to me implies a black diamond on the User side of the relation. Both ends of the relation have a 1 multiplicity. here's what andromda generates: <many-to-one name="rolodex" class="fractals.psychos.core.pim.entity.RolodexImpl" outer-join="auto" unique="true" not-null="false" cascade="delete"> <column name="ROLODEX_FK"/> </many-to-one> I have specified @andromda.hibernate.lazy on BOTH ends of the relation, just to be sure. not only is the "lazy" attribute missing, but, ok I may be naive, but this isn't a many-to-one association, but a 1-to-1 association. can somebody please explain this to me? bernard --- Wouter Zoons <[EMAIL PROTECTED]> wrote: I can't figure out how to tell hibernate NOT to eagerly load relations. It seems to be completely ignorant of the "lazy=true" attribute. it is not bottom of this page: http://team.andromda.org/docs/andromda-spring-cartridge/howto2.html (compositionDefinesEagerLoading) http://team.andromda.org/docs/andromda-hibernate-cartridge/namespace.html So, as a last resort, as is stated there, I'd like to try setting max_fetch_depth to 1 or 2, only I don't know how to let AndroMDA specify that. (hibernateMaxFetchDepth) http://team.andromda.org/docs/andromda-hibernate-cartridge/namespace.html -- Wouter __________________________________ Celebrate Yahoo!'s 10th Birthday! Yahoo! Netrospective: 100 Moments of the Web http://birthday.yahoo.com/netrospective/ ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click _______________________________________________ Andromda-user mailing list Andromda-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/andromda-user ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95&alloc_id396&op=click _______________________________________________ Andromda-user mailing list Andromda-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/andromda-user