Can you explain what are you trying to achieve in general (i.e.
scenario details)? I may be able to help then.
Andrus
On Apr 12, 2006, at 12:01 PM, [EMAIL PROTECTED] wrote:
Hi Andrus ,
I tested DeepMergeOperation. Merged object on targetContext
(anotherObject) is created as I desired with its relations but I
observe actually anotherObject is not created physically on
database .I used the targetContext.commitChanges() to create on
database but not create it.What is the reason of this or how can
commit created anotherObject on targetContext.
----- Orjinal Mesaj -----
Kimden: Andrus Adamchik
Tarih: Tuesday, April 11, 2006 17:53
Konu: Re: Object migrates between DataDomains
Kime: [email protected]
Yeah, default mechanism is "lazy" in that it assumes that
related
objects can be resolved from the database on demand. Copying
a
subgraph of new objects is a bit more tricky. In 1.2 you can
try
using org.objectstyle.cayenne.util.DeepMergeOperation for
your
purpose. Something like this:
DataContext srcContext, targetContext;
DataObject object;
ClassDescriptor descriptor =
targetContext.getEntityResolver().getClassDescriptor("MyEntity");
DataObject anotherObject = new
DeepMergeOperation(targetContext).merge
(object, descriptor);
DeepMergeOperation merges everything that is attached to a
given
object and is already resolved in memory. If you need to
implement
different logic, you can write your own version using
DeepMergeOperation as a template. An example of a different
graph
traversal termination logic is ObjectDetachOperation that is
based on
a preset tree of relationships.
Andrus
On Apr 11, 2006, at 5:50 PM, [EMAIL PROTECTED] wrote:
Hi,
Thank you for help. I make the changes as you say but I
observe the
DataContext.localObject(..) not set the relations (forign
key
id's).Can you help me for migrating
objects with its relations through DataDomains.
----- Orjinal Mesaj -----
Kimden: Andrus Adamchik <[EMAIL PROTECTED]>
Tarih: Monday, April 10, 2006 11:55
Konu: Re: Object migrates between DataDomains
Kime: [email protected]
On Apr 10, 2006, at 11:48 AM, [EMAIL PROTECTED] wrote:
Hi,
Is there a easy way to migrate created objects from one
DataDomain
to other DataDomain.
Thank you...
Technically DataObject belongs to a DataContext, so we should be
speaking about moving objects between DataContexts (that in turn
can
belong to different DataDomains). This is done with
DataContext.localObject(..)
http://objectstyle.org/confluence/display/CAYDOC/Moving+Objects
+Between+Contexts
Of course object mappings have to be compatible in both domains
involved.
Andrus
