Can any one help me..
On Fri, Apr 30, 2010 at 10:46 PM, Sudhir Ramanandi sramana...@gmail.comwrote:
I tried to implement unowned one to many relationship using column alias as
explained here
http://gae-java-persistence.blogspot.com/2010/02/truth-about-joins.html
Here's my code
@Entity
Jason: good point and yes the code did work
Leszek: good point!
Thanks all for the help.
On Sep 3, 9:27 am, leszek leszek.ptokar...@gmail.com wrote:
Keep also in mind that it is not enough to convert 'Child' to 'Key'
while persisting 'Parent'. You should also set key to Parent in Child,
I haven't tested this, but I believe this should work, yes. Let me know
if/when you try it.
As an aside, the object you return here won't actually be detached since
you're not using transactions (and hence, not committing). You'll want to
use something like the following or use a transaction.
You can follow something like that
class Parent {
@Persistent
private ListLong/Key childList;
// non Persistent
private ListChild list;
...
}
class Child {
@PrimaryKey
private Long/Key key;
...
}
// before save Parent
private void beforeSave(EntityManager
Hi,
First of all, thanks for posting, it really helps me.
objectuser : Good post and the link was really nice.
Albert Attard : Thanks for the examples, it shows that you have to
wright lots of code to manage your own relationships (which I was
trying to avoid).
leszek: This is what I did and
Hi:
Quote from the page:
http://code.google.com/appengine/docs/java/datastore/relationships.html#Unowned_Relationships
The App Engine implementation of JDO does not yet implement this facility,
but don't worry, you can still manage these relationships using Key values
in place of instances (or
Hi,
No it doesnt really help me. I understand that I have to manage the
relationships myself but I cant really get it working. So an example
would be nice.
Thanks
FF
On Aug 31, 5:31 pm, Albert Attard albertatt...@gmail.com wrote:
Hi:
Quote from the
