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ceek79
 Post subject: Unable to resolve property: _com
PostPosted: Tue Jun 30, 2009 10:20 am 
Newbie

Joined: Mon Jun 29, 2009 1:45 pm
Posts: 3
Hello,

i'm getting this exception when i try to merge a persisted object with my session:

Code:
org.hibernate.HibernateException: Unable to resolve property: _com
   at org.hibernate.tuple.entity.EntityMetamodel.getPropertyIndex(EntityMetamodel.java:487)
   at org.hibernate.tuple.entity.AbstractEntityTuplizer.getPropertyValue(AbstractEntityTuplizer.java:302)
   at org.hibernate.persister.entity.AbstractEntityPersister.getPropertyValue(AbstractEntityPersister.java:3600)
   at org.hibernate.event.def.DefaultMergeEventListener.mergeTransientEntity(DefaultMergeEventListener.java:322)
   at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:282)
   at org.hibernate.event.def.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:397)
   at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:234)
   at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:715)
   at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:697)
   at org.hibernate.engine.CascadingAction$6.cascade(CascadingAction.java:268)
   at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:292)
   at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:240)
   at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:193)
   at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:320)
   at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:266)
   at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:243)
   at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:193)
   at org.hibernate.engine.Cascade.cascade(Cascade.java:154)
   at org.hibernate.event.def.AbstractSaveEventListener.cascadeAfterSave(AbstractSaveEventListener.java:479)
   at org.hibernate.event.def.DefaultMergeEventListener.mergeTransientEntity(DefaultMergeEventListener.java:351)
   at org.hibernate.event.def.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:282)
   at org.hibernate.event.def.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:397)
   at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:234)
   at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:715)
   at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:697)
   at org.hibernate.engine.CascadingAction$6.cascade(CascadingAction.java:268)
   at org.hibernate.engine.Cascade.cascadeToOne(Cascade.java:292)
   at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:240)
   at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:193)
   at org.hibernate.engine.Cascade.cascadeCollectionElements(Cascade.java:320)
   at org.hibernate.engine.Cascade.cascadeCollection(Cascade.java:266)
   at org.hibernate.engine.Cascade.cascadeAssociation(Cascade.java:243)
   at org.hibernate.engine.Cascade.cascadeProperty(Cascade.java:193)
   at org.hibernate.engine.Cascade.cascade(Cascade.java:154)
   at org.hibernate.event.def.DefaultMergeEventListener.cascadeOnMerge(DefaultMergeEventListener.java:563)
   at org.hibernate.event.def.DefaultMergeEventListener.entityIsPersistent(DefaultMergeEventListener.java:266)
   at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:240)
   at org.hibernate.event.def.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:84)
   at org.hibernate.impl.SessionImpl.fireMerge(SessionImpl.java:705)
   at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:689)
   at org.hibernate.impl.SessionImpl.merge(SessionImpl.java:693)


Hibernate 3.3.2.GA, vista, jdk 6, postgresql

i've checked my xml-mapping, well intellij did the job for me, there is no error.

Can anyone tell me how to trace this to the reason?

thanks,
chris
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AndreasH
 Post subject: Re: Unable to resolve property: _com
PostPosted: Sun Jul 18, 2010 2:41 pm 
Newbie

Joined: Fri Jul 14, 2006 7:32 am
Posts: 9
The original post is more than a year old and I don't know if the problem was solved then,
but today I'm trying to solve a very similar error and I'm running out of ideas.

Well, in my case the error message is:

org.hibernate.HibernateException: Unable to resolve property: _at

This exception occurs when hibernate tries to cascade a merge operation
to a many-to-many mapping.

I have checked it several times: none of my mapping files or entity classes
have a property called "_at"! This string doesn't even occur anywhere in my files
(checked with grep). Where does Hibernate get this string from?

What alerts me is: in my case the Java package names all start with "at" (the toplevel domain for austria).
In the original post, the exception tells about an unresolvable property "_com", which makes me wonder
if this also might be the start of a Java package name ("com.something").

I'm seeing this problem with hibernate 3.2.7.ga.

Any idea anyone?
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agarhi
 Post subject: Re: Unable to resolve property: _com
PostPosted: Mon Nov 17, 2014 7:58 pm 
Newbie

Joined: Sat Apr 19, 2014 4:10 pm
Posts: 2
I am facing the _com version of the error and our packages begin with com.

Have no idea what to do with this one.

Please suggest.
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