Op 07-02-13 15:15, André Fróes schreef:

Hello!
I'm still not getting good with drools rules, i'm trying several examples and basic ones. Some i did without any problem and understood plenty well, but when I try to make an approach to what i'm aiming, I'm not able to.

Right now I'm trying to compose this:

When

there's an workorder with skill

and there's and engineer with the skill and capable of doing that workorder

then

the engineer should do it

So i tried something like this:

rule "assignSkillWOToSkilledEngineer"

when

$wo : WorkOrder( $requiredSkill : requiredSkill )

$engineer : Engineer(skill == $requiredSkill)

there's no restriction that the WorkerOrder is assigned to that engineer, so it matches with every engineer of that skill?

then

insertLogical(new IntConstraintOccurrence("assignSkillWOToSkilledEngineer", ConstraintType.NEGATIVE_HARD,

1, $engineer));

the cause $engineer is a problem: If an engineer combines with 2 workorders, it will only count for 1 point due the way insertLogical work.
Normally the causes are the planning entities involved.
Try
insertLogical(new IntConstraintOccurrence("assignSkillWOToSkilledEngineer", ConstraintType.NEGATIVE_HARD,

1, $wo));

end

I would write it like this (pseudo code):

rule "assignSkillWOToSkilledEngineer"

when

$wo : WorkOrder( $requiredSkill : requiredSkill, $assignedEngineer : assignedEngineer )

not EngineerSkillRelation(skill == $requiredSkill, engineer == $assignedEngineer)
      then
        insertLogical(new IntConstraintOccurrence("assignSkillWOToSkilledEngineer", ConstraintType.NEGATIVE_HARD,
        1, $wo));

end

i get no exceptions, but the sort is not working properly
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