Hibernate Community • View topic - How to persist a list?

View unanswered posts | View active topics

Board index » Hibernate & Java Persistence » Hibernate Users

All times are UTC - 5 hours [ DST ]

How to persist a list?

Page 1 of 1

[ 2 posts ]

Previous topic | Next topic

Author

Message

Jaskiran

Post subject: How to persist a list?

Posted: Tue Dec 06, 2011 7:21 am

Newbie

Joined: Tue Nov 29, 2011 12:42 am
Posts: 3

Hi

1. I have created a list as follows:
ArrayList<Menu> tempList = new ArrayList<Menu>();//Menu is an entity
2. Populating this list with a few 'Menu' objects.
3. then doing:
entityManager.persist(tempList);
At this point I get following exception:
java.lang.IllegalArgumentException: Unknown entity: java.util.ArrayList
at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:223)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:240)
at $Proxy26.persist(Unknown Source)

Please guide what I might be missing.
Thanks!

Top

tux4ever

Post subject: Re: How to persist a list?

Posted: Tue Dec 06, 2011 2:46 pm

Newbie

Joined: Mon Jun 21, 2010 9:03 am
Posts: 7

Hi!

I think it is not possible to persist a list, because list not an entity.
Just iterate over the result list and call persist on every entity.

Code:

for(Menu menu : menus)
{
    entityManager.perist(menu);
}

Best regards.

Top

Page 1 of 1

[ 2 posts ]

Board index » Hibernate & Java Persistence » Hibernate Users

All times are UTC - 5 hours [ DST ]

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum