Hi, Don't think I intended to create a new instance, just modify the one matched in the rule. The following seems to have got it working. rule "Myscoreincreaserule" dialect "mvel" when a : Applicant( name == "chris" ) then a.setScore( a.score + 2 ); end Thanks for pointing me in the right direction. Greg Barton wrote: > 1) Where is the variable "score" initialized? If it's not a global the > rule wouldn't compile. > > 2) Is your intent to create a new Applicant instance, or modify the one > matched in the rule? (Or maybe you want to gather the score from the > matched instance and put it (+2) into a new instance? > > --- On Sun, 6/7/09, Chris Strachan <chris.strac(a)googlemail.com&gt; wrote: > > > >> From: Chris Strachan <chris.strac(a)googlemail.com&gt; >> Subject: [rules-users] Weighted rules / scoring >> To: rules-users(a)lists.jboss.org >> Date: Sunday, June 7, 2009, 1:11 PM >> Hi, >> >> >> >> I want to be able to use drools / guvnor brms to store >> weighted rules >> >> (scoring), however I can't seem to find a way to do >> this. >> >> >> >> I attempted the following, >> >> >> >> rule "Myscoreincreaserule" >> >> dialect "mvel" >> >> when >> >> Applicant( name == >> "chris" ) >> >> then >> >> Applicant fact0 = new Applicant(); >> >> fact0.setScore( score + 2 ); >> >> insert(fact0 ); >> >> end >> >> >> >> drools didn't seem to like the way I did this. >> Perhaps this isn't >> >> permitted, in effect I am trying to do - score = score + >> 2. >> >> >> >> Upon validation I get the following error. >> >> >> >> [Myscoreincreaserule] Unable to build >> expression for 'consequence': Failed >> >> to compile: 1 compilation error(s): - (1,3) unqualified >> type in strict mode >> >> for: age ' Applicant fact0 = new Applicant(); >> fact0.setScore( score + 2 ); >> >> insert(fact0 ); ' >> >> >> >> Any ideas on how I should be approaching this? >> >> >> >> Thanks, >> >> >> -----Inline Attachment Follows----- >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> > > > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users