As a newbie to Drools (using v4.0.7), I’m struggling a bit with the right way to express the following concept

I have a ParentFactObject with an array of ChildFactObjects.

The ChildFactObjects have a boolean attribute “TestMe”

I want to pattern match all ParentFactObjects for whom all ChildFactObjects have false for TestMe

Here’s what I’ve tried:

rule "NoTestChildren"

        when

                $parentFactObject : ParentFactObject // parent exists

                (

                )

                not ChildFactObject     // no child exists that has TestMe true

                (

                        TestMe == true

                ) from $parentFactObject.childFactObjects

        then

                log("Rule NoTestChildren fired.");

end

I get the following:

org.drools.rule.InvalidRulePackage: [66,4]: unknown:66:4 mismatched token: [@1085,4469:4472='from',<38>,66:4]; expecting type THEN

Also tried this:

rule " NoTestChildren "

        when

                $parentFactObject : Borrower // parent exists

                (

                )

                forall ($childFactObject : ChildFactObject      // no child exists that has TestMe true

                (

                        TestMe == true

                ) )from $parentFactObject. childFactObjects

        then

                log("Rule NoTestChildren fired.");

end

I’ve tried a series of variations with similar results.

Can anyone provide any guidance on how to do this?

Thanks in advance.

Tom Murphy

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