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Updating a bag ...

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demol

Post subject: Updating a bag ...

Posted: Mon Mar 19, 2007 1:09 pm

Beginner

Joined: Wed Jun 28, 2006 2:03 pm
Posts: 22

Hibernate version:
1.2.0.CR1

Hello all...
My mapping documents:

Code:

<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
  <class name="X" table="tblX" lazy="false">

    <id name="IdX" column="id" type="Int32" unsaved-value="0">
      <generator class="identity"/>
    </id>

    <bag name="lpath" generic="true" access="field" table="tblY" inverse="true" lazy="false" cascade="all-delete-orphan">
      <key column ="IdX"></key>
      <one-to-many class ="Y" />
    </bag>
   
  </class>
</hibernate-mapping>

The insert works great...
The problem occurs when I try to update the X class...
To do that, first I load a X´s entity :
...
X _x = session.Load(persitentType,id);
...

After that I change my path´s list (lPath), like that :

Code:

List<Path> _l = (List<Path>)Session["PATH_LIST"];
_x.Path.Clear();
_x.Path = _l;
session.SaveOrUpdate(_x);

So, I got the following error:

a different object with the same identifier value was already associated with the session: 1, of class: Y

Any ideas?

ty

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devonl

Post subject:

Posted: Mon Mar 19, 2007 6:57 pm

Expert

Joined: Fri May 13, 2005 5:56 pm
Posts: 308
Location: Santa Barbara, California, USA

you can't just replace a collection like that, you would need to do something like:

Code:

List<Path> _l = (List<Path>)Session["PATH_LIST"];
_x.Path.Clear();
foreach (Path p in _l)
  _x.Path.Add(p);
  // and possiblly
  // p.X = _x;
session.SaveOrUpdate(_x);

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demol

Post subject:

Posted: Tue Mar 20, 2007 8:39 am

Beginner

Joined: Wed Jun 28, 2006 2:03 pm
Posts: 22

devonl wrote:

you can't just replace a collection like that, you would need to do something like:

Code:

List<Path> _l = (List<Path>)Session["PATH_LIST"];
_x.Path.Clear();
foreach (Path p in _l)
  _x.Path.Add(p);
  // and possiblly
  // p.X = _x;
session.SaveOrUpdate(_x);

I did that

Code:

 foreach (Path p in _l)
{
                p.X = _x;
               _x.Path.Add(p);                
}

And I got the same error ! :(

a different object with the same identifier value was already associated with the session: 1, of class: Y

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devonl

Post subject:

Posted: Tue Mar 20, 2007 1:51 pm

Expert

Joined: Fri May 13, 2005 5:56 pm
Posts: 308
Location: Santa Barbara, California, USA

okay, please post your class definition and the mapping file.

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