> I understand those concepts now. thanks.
>
> I tried the way you have suggested but still returns null values. Even
> if I am not using complex query just "select * from cahflow", it returns
> all rows with null value.
>
> Any idea?
> Denna
Doing "select * ..." may not produce the result that Cayenne understands.
The outcome is DB and configuration-dependent. I suggest describing each
column in the result explicitly buy using the #result() directive (see
docs on it at
http://objectstyle.org/cayenne/userguide/fetch/sqltemplate-scripting.html).
Or use data rows [query.setFetchingDataRows(true) or corresponding
checkbox in the Modeler] - Cris mentioned this briefly. The result of your
original aggregate query won't map to any of the entities anyway, so data
rows approach seems more sensible.
What this means is that the result will contain java.utl.Map instances
instead of DataObjects. Then you can take each such map and convert it to
your "aggregated" object:
SQLTemplate query = ...
query.setFetchingDataRows(true);
List rows = context.performQuery(query);
Iterator it = rows.iterator();
while(it.hasNext()) {
Map map = (Map) it.next();
// do whatever...
}
Andrus
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