[rules-users] How to check if a property IS null ?

[Hendy Irawan]

I'm trying to check if property is null, but the rule is never fired :

Sample :

rule "Cancel"
    when
        $action				: CancelProductBookingDetail( created == null ) 
    then

end

(created is of type java.util.Date)

Any help is appreciated.

Hendy



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