Thanks for posting the solution! Does it work with just "retract" rather than "modifyRetract"? Could the Drools' team remind me (the group) of the difference between the two? ------------------------------ *From:* Ronald R. DiFrango [mailto:ron.difrango@gmail.com] *Sent:* 03 October 2007 14:57 *To:* Anstis, Michael (M.) *Cc:* Rules Users List *Subject:* Re: [rules-users] Retract in a function I got it, the following works: function void openRTVLines(WorkingMemory workingMemory, QueryResults results, String status) { System.out.println( "We have " + results.size() + " Open RTV Lines" ); for ( Iterator it = results.iterator(); it.hasNext(); ) { QueryResult result = ( QueryResult ) it.next(); DetailLine line = ( DetailLine ) result.get( "line" ); line.setStatus (status); // Now retract those objects from Working Memory FactHandle handle = workingMemory.getFactHandle(line); System.out.println("handle : " + handle); workingMemory.modifyRetract(handle); } } On 10/3/07, Ronald R. DiFrango <ron.difrango(a)gmail.com > wrote: > > I have now tried the following and it did not seem to have the intended > result of removing the detail line from working memory: > > function void openRTVLines(WorkingMemory workingMemory, QueryResults > results, String status) > { > System.out.println( "We have " + results.size() + " Open RTV Lines" > ); > for ( Iterator it = results.iterator(); it.hasNext(); ) { > QueryResult result = ( QueryResult ) it.next (); > DetailLine line = ( DetailLine ) result.get( "line" ); > line.setStatus(status); > > // Now retract those objects from Working Memory > FactHandle[] handles = result.getFactHandles(); > System.out.println("handles.length : " + handles.length); > for(int i = 0; i < handles.length; i++) > { > System.out.println("Retracting : "); > workingMemory.retract(handles[i]); > } > } > } > > Any other thoughts out there? > > On 10/3/07, Ronald R. DiFrango < ron.difrango(a)gmail.com&gt; wrote: > > > > Michael, > > > > Those detail lines are in working memory for sure. In fact the query > > it self only works on working memory objects. > > > > As far as I know you can not place the results of a queryResult in the > > LHS. > > > > Ron > > > > On 10/3/07, Anstis, Michael (M.) < manstis1(a)ford.com&gt; wrote: > > > > > > Can you not get a reference to a DetailLine in the LHS? > > > > > > If you have not inserted DetailLine objects into working memory how > > > can you expect to retract them? > > > > > > If you have inserted DetailLine's into working memory what does > > > query "Open RTV Lines" return, can it be joined into the LHS? (or split into > > > two rules)? > > > > > > ------------------------------ > > > *From:* rules-users-bounces(a)lists.jboss.org [mailto: > > > rules-users-bounces(a)lists.jboss.org] *On Behalf Of *Ronald R. > > > DiFrango > > > *Sent:* 03 October 2007 14:01 > > > *To:* Rules Users List > > > *Subject:* [rules-users] Retract in a function > > > > > > All, > > > > > > I have the following function that I call from all of my rules. > > > When I execute this function, I need to retract that object from working > > > memory. The problem is that when I insert the comment line below I get a > > > compiler error saying that I can only issue a retract on fact handles. > > > > > > Here is an example of my rule plus the function: > > > > > > rule "QTY Percentage tolerance - Approval" > > > salience -25 > > > no-loop true > > > when > > > rtvHeader : RtvHeader( totalAmount : totalAmount, status not > > > in ( StatusConstants.MATCHED, StatusConstants.APPROVAL) ) > > > repaymentCode : RepaymentCode( code == "QTY", matchApprv == > > > "Y", tolDollar ==0, tolPercent != 0, tolPercent : tolPercent ) > > > qtyOutput : QTYOutput( sumRTVQty : sumRTVQty , sumCmAndRnr : > > > sumCmAndRnr ) > > > eval( qtyPercentage(qtyOutput, totalAmount, tolPercent) ) > > > then > > > System.out.println("QTY Percentage tolerance - No > > > Approval"); > > > rtvHeader.setStatus(StatusConstants.APPROVAL ); > > > openRTVLines(drools.getWorkingMemory(), > > > drools.getWorkingMemory().getQueryResults( "Open RTV Lines" ), > > > StatusConstants.MATCHED_WITHIN_TOLERANCE); > > > end > > > > > > function void openRTVLines(WorkingMemory workingMemory, QueryResults > > > results, String status) > > > { > > > System.out.println( "We have " + results.size() + " Open RTV > > > Lines" ); > > > for ( Iterator it = results.iterator(); it.hasNext(); ) { > > > QueryResult result = ( QueryResult ) it.next (); > > > DetailLine line = ( DetailLine ) result.get( "line" ); > > > line.setStatus(status); > > > > > > // I need to add this in > > > // workingMemory.retract(line); > > > } > > > } > > > > > > Thanks in advance, > > > > > > Ron > > > > > > > > > > > >