[rules-users] Weighted rules / scoring
Greg Barton
greg_barton at yahoo.com
Sun Jun 7 14:40:23 EDT 2009
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 at googlemail.com> wrote:
> From: Chris Strachan <chris.strac at googlemail.com>
> Subject: [rules-users] Weighted rules / scoring
> To: rules-users at 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,
>
>
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>
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