10:59 p.m.
Hi all
I'm still struggling with the handling of lists and membership in the
LHS of rule. I'm trying to formulate a rule that only fires if a certain
object is not yet a member of a list.
Here's what I currently have (Drools 5.5.0 btw):
rule "R2030: UpdateDQAttribute"
dialect "mvel"
agenda-group "PROCESS_CHECKRESULTS"
when
pv : PriceViolation ( p : changedPrice.price, dqc : check )
ps : PriceSeries ( id == p.seriesId )
i : Instrument ( id == ps.instrument.id )
dqa : DQAttribute ( rootId == i.id, objectId == p.id )
not dqcv : DQCheckViolation ( check.id == dqc.id ) from
dqa.checkViolations
then
# debug
for (DQCheckViolation dqcv : dqa.checkViolations) {
logger.debug("dqc: {}, dqcv: {}", dqc.id, dqcv.check.id);
}
end
The rule fires and the log statement produces
PriceCheck: dqc: 6fc6636b-9b7c-4302-bce7-1680eec57830, dqcv:
6fc6636b-9b7c-4302-bce7-1680eec57830
The ids are the same, so I would have expected that last LHS condition
to avoid that the rule fires.
--
CU, Joe
9:21 a.m.
Sorry, the actual error in my logic was totally unrelated to the
fragment below.
The problem was that the DQAttribute that should have matched below was
inserted by another rule, but the insertion was done at a time when the
checkViolations collection was still emtpy. And I had forgotten the
modify() after filling the checkViolations collection.
So the rule "saw" an empty collection and that last condition did not
trigger. Once I corrected that, things started working :-)
On 08/03/2013 10:59 PM, Joe Ammann wrote:
Here's what I currently have (Drools 5.5.0 btw):
rule "R2030: UpdateDQAttribute"
dialect "mvel"
agenda-group "PROCESS_CHECKRESULTS"
when
pv : PriceViolation ( p : changedPrice.price, dqc : check )
ps : PriceSeries ( id == p.seriesId )
i : Instrument ( id == ps.instrument.id )
dqa : DQAttribute ( rootId == i.id, objectId == p.id )
not dqcv : DQCheckViolation ( check.id == dqc.id ) from
dqa.checkViolations
then
# debug
for (DQCheckViolation dqcv : dqa.checkViolations) {
logger.debug("dqc: {}, dqcv: {}", dqc.id, dqcv.check.id);
}
end
The rule fires and the log statement produces
PriceCheck: dqc: 6fc6636b-9b7c-4302-bce7-1680eec57830, dqcv:
6fc6636b-9b7c-4302-bce7-1680eec57830
The ids are the same, so I would have expected that last LHS condition
to avoid that the rule fires.
--
CU, Joe
10:05 a.m.
The rule is correct, and it works with similar scenarios.There may be
a bug, due to circumstances. Can you post a simple but complete set of
files to reproduce this?
-W
On 03/08/2013, Joe Ammann <joe(a)pyx.ch> wrote:
Hi all
I'm still struggling with the handling of lists and membership in the
LHS of rule. I'm trying to formulate a rule that only fires if a certain
object is not yet a member of a list.
Here's what I currently have (Drools 5.5.0 btw):
rule "R2030: UpdateDQAttribute"
dialect "mvel"
agenda-group "PROCESS_CHECKRESULTS"
when
pv : PriceViolation ( p : changedPrice.price, dqc : check )
ps : PriceSeries ( id == p.seriesId )
i : Instrument ( id == ps.instrument.id )
dqa : DQAttribute ( rootId == i.id, objectId == p.id )
not dqcv : DQCheckViolation ( check.id == dqc.id ) from
dqa.checkViolations
then
# debug
for (DQCheckViolation dqcv : dqa.checkViolations) {
logger.debug("dqc: {}, dqcv: {}", dqc.id, dqcv.check.id);
}
end
The rule fires and the log statement produces
PriceCheck: dqc: 6fc6636b-9b7c-4302-bce7-1680eec57830, dqcv:
6fc6636b-9b7c-4302-bce7-1680eec57830
The ids are the same, so I would have expected that last LHS condition
to avoid that the rule fires.
--
CU, Joe
12:41 p.m.
On 08/04/2013 10:05 AM, Wolfgang Laun wrote:
The rule is correct, and it works with similar scenarios.There may
be
a bug, due to circumstances. Can you post a simple but complete set of
files to reproduce this?
You're perfectly right :-) The rule was correct, but as I wrote in an
earlier post, I forgot to modify() the DQAttribute fact after changing
the checkViolations collection. So the engine could not know the correct
contents of the collection.
Thanks for looking into this!
--
CU, Joe
3918
days inactive
3919
days old
3 comments
2 participants
participants (2)
-
Joe Ammann -
Wolfgang Laun