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jagdfalke
 Post subject: Problem beim Löschen von Objekten
PostPosted: Sat Nov 17, 2007 6:53 pm 
Newbie

Joined: Wed Jun 20, 2007 1:34 pm
Posts: 1
Hi,
ich bekomme immer folgende Exception:
Quote:
[java] Exception in thread "main" org.hibernate.ObjectDeletedException: deleted object would be re-saved by cascade (remove deleted object from associations): [de.javafalke.jwarehouse.model.Location#10]
[java] at org.hibernate.impl.SessionImpl.forceFlush(SessionImpl.java:1014)
[java] at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:165)
[java] at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:94)
[java] at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
[java] at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:507)
[java] at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:499)
[java] at org.hibernate.engine.CascadingAction$5.cascade(CascadingAction.java:218)
[java] at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:268)
[java] at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:216)
[java] at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:169)
[java] at org.hibernate.engine.Cascade.cascade(Cascade.java:130)
[java] at org.hibernate.event.def.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:131)
[java] at org.hibernate.event.def.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:122)
[java] at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:65)
[java] at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:26)
[java] at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
[java] at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
[java] at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
[java] at de.javafalke.jwarehouse.PersistenceManager.delete(PersistenceManager.java:155)
[java] at de.javafalke.jwarehouse.Run.addSomethingToDB(Run.java:130)
[java] at de.javafalke.jwarehouse.Run.main(Run.java:23)
[java] Java Result: 1


Ich nehm an das ist ein Problem in den Mapping files oder? Also hier mal das hbm.xml zu Location:

Code:
<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">

<hibernate-mapping>

    <class name="de.javafalke.jwarehouse.model.Location" table="LOCATIONS">

        <id name="id" column="ID_LOCATION">
            <generator class="increment"/>
        </id>

        <property name="name" type="string" column="NAME_LOCATION"/>

      <many-to-one name="parent" cascade="all" class="de.javafalke.jwarehouse.model.Location" column="PARENT_LOCATION"/>
   
      <list name="children" cascade="all" lazy="true">
            <key column="PARENT_LOCATION"/>
            <list-index column="IDX"/>
            <one-to-many class="de.javafalke.jwarehouse.model.Location"/>
       </list>
          
    </class>

</hibernate-mapping>


Oder muss ich doch ganz wo anders suchen?
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Jolliver
 Post subject: Re: Problem beim Löschen von Objekten
PostPosted: Sun Nov 18, 2007 5:39 pm 
Newbie

Joined: Wed Nov 07, 2007 7:36 pm
Posts: 6
jagdfalke wrote:
<property name="name" type="string" column="NAME_LOCATION"/>

<many-to-one name="parent" cascade="all" class="de.javafalke.jwarehouse.model.Location" column="PARENT_LOCATION"/>

<list name="children" cascade="all" lazy="true">
<key column="PARENT_LOCATION"/>
<list-index column="IDX"/>
<one-to-many class="de.javafalke.jwarehouse.model.Location"/>
</list>


Hallo Jagdfalke,
ich kenne mich mit XML nicht wirklich aus, da ich Annotations benutze, aber 1.) in der Location.hbm.xml kannst Du schlecht als Mapping-Klasse wieder Location angeben.
2.) machen eine Many-To-One und eine Liste auf die gleiche Klasse keinen Sinn.
Hier findest Du wohl eine Lösung:
http://www.hibernate.org/hib_docs/v3/re ... tional-m21
Viele Grüße und viel Erfolg,
Jolliver
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mican
 Post subject:
PostPosted: Tue Nov 20, 2007 7:40 am 
Beginner
Beginner

Joined: Thu Jan 04, 2007 5:44 am
Posts: 26
Location: Innsbruck - Sivas(TR) - Bregenz
das delete reicht meistens nicht aus ausser du hast cascadet deleting enabled. Du musst noch bei den assozierenden Objekten das gelöschte Objekt null setzen.. zb du hast ein Person p objekt welche noch eine 1:1 beziehung mit einem Adress a objekt hat und du löschst die adresse mit

session.delete(a);

dann musst du noch

p.setAdresse(null); durchführen.

Bzw. wenn du ein objekt in einer collections löschst evtl mit remove()

sonst versucht hibernate beim commit noch die referenzobjekte die ja in der session gelöscht wurdne wieder zu speichern.
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