Hi all,

I have problems with a many-to-many associations, I can do inserts but I cant do querys. I obtain ever the same exception. I havbe test with lazy = "false", outer-join="true" but the same. I would appreciate any help.

Thanks


Rodolfo


Hibernate version: 3.0.5

Mapping documents:
<class name="com.mdagen.rallie.model.Equipo" table="EQUIPOS">
...
<set name="marcas" cascade="save-update"
table="EQUIPOS_MARCAS">
<key column="NUMERO"/>
<many-to-many class="com.mdagen.rallie.model.Marca"
column="ID_MARCA"/>
</set>
...
</class>
_______________

<class name="com.mdagen.rallie.model.Marca" table="MARCAS">
...
<set name="equipos" inverse="true" cascade="save-update"
table="EQUIPOS_MARCAS">
<key column="ID_MARCA"/>
<many-to-many class="com.mdagen.rallie.model.Equipo"
column="NUMERO"/>
</set>
</class>

Code between sessionFactory.openSession() and session.close():
...
result = (Marca)getHibernateTemplate().load(Marca.class, idMarca);
Hibernate.initialize(resultado.getEquipos());
...

Full stack trace of any exception that occurs:
2006-01-10 15:38:33 StandardWrapperValve[action]: Servlet.service() para servlet action lanzó excepción
org.hibernate.LazyInitializationException: illegal access to loading collection at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:172)

Name and version of the database you are using:
mysql 4.1

Hi,

*full stacktrace*, not last 2 lines :)

Assuming this is what am thinking it is....

This error at object loading time is quite typical to an object trying to modify linked objet during Hibernate initialisation process.

example:


You can not modify other classes that can be potentially managed by hibernate inside a setter accessed by hibernate. A setter is made to set a value. If it begin to modify other object, then it is not a setter anymore.

thanks,

my POJO code class is :

public class Marca ... {
....
private Set equipos;
....

public setEquipos(Set data) {
this.equipos = data;
}
...
}
_____________

public class Equipo ... {
...
private Set marcas;
....

public setMarcas(Set data) {
this.marcas = data;
}
...
}

I think the problem could be other than you say because I don´t do any set into my set methods.

The other exceptions are exception from catalina, struts and tomcat I think this full stack don´t give very much information.

What the solution do you think I could do.


Thanks Rodolfo

Again, stacktrace!