[rules-users] Optaplanner rule to assign employee only to shift when he/she has the skills

I am trying to create a rule that adds a hard constraint when an employee gets assigned to a shift for which he does not have the skills. I have created a table in MySQL that assigns an employee to a certain shiftType. In my code I stated that once an employee is assigned to a shiftType, he or she automatically has the skills needed for that shiftType, hence the skill == $shiftType part in the rule. rule "alternativeSkill" when $assignment : ShiftAssignment($employee : employee, $shiftType : shiftType) not SkillProficiency(employee == $employee, skill == $shiftType) then scoreHolder.addHardConstraintMatch(kcontext, -1); end With the above rule employees still get assigned to shifts they do not have the skill for. What is wrong with this rule? Thanks. Kind regards, Nick -- View this message in context: http://drools.46999.n3.nabble.com/Optaplanner-rule-to-assign-employee-onl... Sent from the Drools: User forum mailing list archive at Nabble.com.