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Object saveOrUpdate(Object)

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ad-rocha

Post subject: Object saveOrUpdate(Object)

Posted: Mon Jul 25, 2005 8:21 am

Beginner

Joined: Mon Jun 20, 2005 3:14 pm
Posts: 33

Hi,

I would like to return the Object saved into database with appropriate fields values (because PK is auto-generated). Is there a way to do this using saveOrUpdate?

Suppose this situation:

Code:

class MyObject {
  long id = 0; // <--- before save
  String desc;
}

myObject = new MyObject();
myObject.setDesc("first object created");
MyObject updatedObj = session.saveOrUpdate(myObject);

System.out.println(updatedObj .getId()); // <--- must print '1' (auto-generated key)

Thanks,

Andre

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sven

Post subject:

Posted: Mon Jul 25, 2005 8:34 am

Expert

Joined: Thu Dec 04, 2003 12:36 pm
Posts: 275
Location: Bielefeld, Germany

If you don't need the saveOrUpdate, you can use:

Code:

Session session = ...;
Serializable id = session.save(Object object);

Otherwise try using this:

Code:

Session session = ...;
Serializable id = session.getIdentifier(Object object);

In your case:

Code:

Serializable id = session.getIdentifier(myObject);

See JavaDoc for more information.

Best regards
Sven

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ad-rocha

Post subject:

Posted: Mon Jul 25, 2005 8:45 am

Beginner

Joined: Mon Jun 20, 2005 3:14 pm
Posts: 33

Sven,

Thanks for your reply, but I would like to return the whole object, included new ID (not only ID object)

Thanks,

André

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sven

Post subject:

Posted: Mon Jul 25, 2005 8:58 am

Expert

Joined: Thu Dec 04, 2003 12:36 pm
Posts: 275
Location: Bielefeld, Germany

Code:

...
Serializable id = session.getIdentifier(myObject); // resp. Seriablizable id = session.save(myObject);
MyObject myObject = (MyObject) session.load(MyObject.class, id)

Alternatively, use Criteria or HQL.

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ad-rocha

Post subject:

Posted: Mon Jul 25, 2005 9:04 am

Beginner

Joined: Mon Jun 20, 2005 3:14 pm
Posts: 33

Sven,

But if my object has a composite PK?

Thanks again,

Andre

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ad-rocha

Post subject:

Posted: Mon Jul 25, 2005 9:05 am

Beginner

Joined: Mon Jun 20, 2005 3:14 pm
Posts: 33

Sven,

But if my object has a composite PK? what kind of data will getIdentifier()return?

Thanks again,

Andre

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sven

Post subject:

Posted: Mon Jul 25, 2005 10:55 am

Expert

Joined: Thu Dec 04, 2003 12:36 pm
Posts: 275
Location: Bielefeld, Germany

Well, I don't know what getIdentifier() will return in case of a composite PK.

Use Criteria or HQL to retrieve your object with id.

Best regards
Sven

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Nebob

Post subject:

Posted: Mon Jul 25, 2005 6:08 pm

Senior

Joined: Thu May 12, 2005 11:40 pm
Posts: 125
Location: Canada

1. saveOrUpdate will modify the object you pass it to set the id.

2. Composite keys are always set by you (using generator class="assigned"), and will therefore always be set before you even call save, if your code is to work.

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tenwit

Post subject: refresh

Posted: Mon Jul 25, 2005 11:56 pm

Expert

Joined: Thu Dec 23, 2004 9:08 pm
Posts: 2008

If saving the object modified fields other than the id (e.g. if the DB fills in a version or timestamp field) then session.refresh(object) could be what you're looking for.

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ad-rocha

Post subject:

Posted: Tue Jul 26, 2005 6:47 am

Beginner

Joined: Mon Jun 20, 2005 3:14 pm
Posts: 33

Thanks guys!

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