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