It's pretty straightforward. In the following code Person is the
parent, and Alert is the child. There are actually many Alert
classes (I'm using Cayenne STI), so the specific Alert class we're
interested in is passed as a parameter. Also, I forgot to mention
that if we shut everything down, and then restart, we do see the
modified status (presumably because Cayenne really had to go back to
the database to get the data for the child list).
/**
* Finds all Alerts of the given type sent to the given person
*
* @param person
* Person to find Alerts for
* @param include_hidden
* If true, include hidden alerts as well
* @param alert_subclass
* Class of alert to search for
* @return List of alert objects, of given type, for the given person
*/
protected static List findFor(Person person, boolean include_hidden,
Class alert_subclass) {
DataContext dc = DataContext.getThreadDataContext();
SelectQuery query = new SelectQuery(alert_subclass);
query.setQualifier(ExpressionFactory.matchExp("toReceiver",
person));
query.andQualifier(ExpressionFactory.matchExp("deleted", new Boolean
(false)));
if (!include_hidden)
query.andQualifier(ExpressionFactory.matchExp("hidden",new Boolean
(false)));
query.addOrdering("createDate",false);
List result = dc.performQuery(query);
return result;
}
On May 19, 2006, at 6:05 AM, Gentry, Michael ((Contractor)) wrote:
Jeff, could you post the code where you are doing the second query?
Thanks!
/dev/mrg
-----Original Message-----
From: Jeff de Vries [mailto:[EMAIL PROTECTED]
Sent: Friday, May 19, 2006 12:09 AM
To: [email protected]
Subject: Caching problem?
Simplified version: I have a parent table and a child table, where
the
child table has a parent_id column and a status column. I change the
status in one of the child records and commit the change. Later, I
ask
for the child records for the given parent record, but the child
record
that I get back on which I changed the status still has the *old*
status
instead of the new status. If I look at the database, the child
record
does have the new status (and in fact I can see the update and
commit as
soon as I commit the child record change).
Why is the parent still seeing the old child status? An additional
note
is that I'm not using parent.getChildArray() but rather a
SelectQuery(Child) that matches toParent to the parent I'm interested
in.
(This is in Cayenne 1.2B2 using PostgreSQL 8.1)
Thanks,
Jeff
