Hi again,
so, I now tried this:
// Delete any condending ads
for(ForecastContendingLineItem temp :
_forecastItem.getForecastContendingLineItemArray()) {
_forecastItem.removeFromForecastContendingLineItemArray(temp);
}
// Now deal with the contending ads
LineItem contendingLineItem = null;
ForecastContendingLineItem relation = null;
for(Integer tempId : result.getContendingAdIds()) {
contendingLineItem =
LineItemDfpInfo.getLineItemByDfpId(config.context(), tempId);
if(contendingLineItem != null) {
relation = new ForecastContendingLineItem();
relation.setToForecast(_forecastItem);
relation.setToLineItem(contendingLineItem);
relation.setUsedImpressions(0L);
relation.setOsi(0L);
_forecastItem.addToForecastContendingLineItemArray(relation);
}
}
So first, I am trying to remove the existing items from the list (first
3 lines). Then I am adding the new once. I now get this:
org.apache.cayenne.validation.ValidationException: [v.3.0.2 Jun 11 2011
09:31:18] Validation failures: Validation failure for
ch.goldbach.lib.ForecastContendingLineItem.toForecast: "toForecast" is
required.
Validation failure for
ch.goldbach.lib.ForecastContendingLineItem.toForecast: "toForecast" is
required.
at
org.apache.cayenne.access.ObjectStoreGraphDiff.validateAndCheckNoop(ObjectStoreGraphDiff.java:111)
at
org.apache.cayenne.access.DataContext.flushToParent(DataContext.java:1110)
at
org.apache.cayenne.access.DataContext.commitChanges(DataContext.java:1060)
The "setToForecast" method says this:
public void setToForecast(Forecast toForecast) {
setToOneTarget("toForecast", toForecast, true);
}
So, I am bit lost, why the line
relation.setToForecast(_forecastItem);
does not seem to work. Any ideas?
Gruß/Regards,
Tobias.
*Adternity GmbH*
Kennedydamm 1
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Tonhallenstraße 16
47051 Duisburg
Tel.: +49 203 298685 37
eMail: [email protected]
Web: http://www.adternity.net
Geschäftsführer: Thomas Servatius, Tobias Wolff, Jörn Mika, Henrik Basten
Amtsgericht: Düsseldorf, HRB 60031
Steuer-Nr.: DE238773677
On 7/31/12 11:00 PM, Tobias Wolff wrote:
Hi,
I am currently trying to do the following in Cayenne 3.0.2:
* fetch an object A
* delete some related objects which are related to A in an n:m relation
* add new objects to A (same n:m relation)
I have undergone a couple of java.util.ConcurrentModificationException
and org.apache.cayenne.validation.ValidationException exception
without being able to fix them. Here is some code, but a general hint
on how to achieve that (especially when to do commits) would be much
appreciated.
* Class Forecast
* Class LineItem
* Class ForecastCondendingLineItem (n:m relation between Forecast
and LineItem)
I have an object F of class Forecast which I have pulled from the
database. Now I try to delete the n:m relations like this:
for(ForecastContendingLineItem temp :
F.getForecastContendingLineItemArray()) {
F.removeFromForecastContendingLineItemArray(temp);
context.deleteObject(temp);
}
This results in the ConcurrentModificationException. I also tried this:
context.deleteObjects(F.getForecastContendingLineItemArray());
There is no exception, but I do not see any DELETE statements in the
log either (probably I shoudn't!?). Then later on I try to add new n:m
relations like this:
relation =
config.context().newObject(ForecastContendingLineItem.class);
relation.setToForecast(_forecastItem);
relation.setToLineItem(contendingLineItem);
relation.setUsedImpressions(0L);
relation.setOsi(0L);
But this results in the following a ""Validation failure for
ch.goldbach.lib.ForecastContendingLineItem.toForecast: "toForecast"
is required."" exception although my feeling is that I do set the
ToForecast relation through "setToForecast", no?
Anyone can help me out?
Thanks,
Tobias.
